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0000-0002-2032-8930 WOS: 000446704800003 A new tetranuclear cyanide-bridged Mn-III-Fe-III complex based on manganese(III) Schiff base and hexacyanoferrate(III) units, [Mn(L)(MeOH)(2)][{Mn(L)}{Fe(CN)(6)}{Mn(L)(MeOH)}]center dot 2MeOH, [H2L=N,N'-bis(2-hydroxy-1-naphthalidenato)-1,2-diaminopropane] (1), has been synthesized and characterized by elemental analysis, UV-Vis, FT-IR, PXRD, single crystal X-ray analyses, magnetic and photoluminescence measurements. Complex 1 consist of one trinuclear cyanido-bridged anion, in which [Fe(CN)(6)](3-) anion bridge [Mn(L)](+) and Mn(L)(MeOH)}](+) cations via two C equivalent to N groups in the cis positions, and also one isolated manganese [Mn(L)(MeOH)(2)](+) cation. DC magnetic susceptibility and magnetization studies showed that complex 1 indicates an antiferromagnetic coupling between low-spin Fe(III) and high-spin Mn(III) through the cyanide bridges. In addition, the complex 1 displays a strong cyan-blue luminescence emission in the solid state condition at room temperature. This behavior might be seen easily from the chromaticity diagram. Thus, the complex may be a good promising cyan-blue OLED developing electroluminescent materials for flatted or curved panel display applications due to the fact that it has such features. Research Funds of Mula Stk Kocman University [BAP-2018/008] The authors are grateful to the Research Funds of Mula Stk Kocman University (BAP-2018/008) for the financial support and Balikesir University, Science and Technology Application and Research Center (BUBTAM) for the use of the Photoluminescence Spectrometer. The authors are also very grateful to Prof. Dr. Andrea Caneschi (Laboratory of Molecular Magnetism, Department of Chemistry, University of Florence) for the use of SQUID magnetometer and helpful suggestions.

Two Schiff base complexes, [Cu(HL)2], 1 and [Ni(HL)2], 2 [H2L = 2–((E)–(2–hydroxyethylimino)methyl)–1–naptaphenol] have been synthesized and characterized by elemental analysis, 1H NMR, 13C NMR, IR spectroscopy, and X-ray diffraction. In the crystalline architecture of 1 and 2, intermolecular O−H···O hydrogen bonds link the molecules which form one-dimensional polymeric chain structure along the c axis. C−H···O and C−H···π intermolecular interaction also connect the molecules in the structures which form to 3D structures of 1 and 2. The ligand and metal complexes 1 and 2 were screened for antibacterial and antifungal activities.

Schiff base–metal complexes have been used widely as catalysts for many organic reactions, such as ring-opening polymerization and oxidation. In view of the importance of CdIIcoordination polymers and in an effort to enlarge the library of such complexes, the title novel polymeric CdIItridentate Schiff base complex, [Cd3(C13H16BrN2O)2Cl4(CH4O)2]n, has been synthesized and characterized by elemental analyses, UV and IR spectroscopies, and single-crystal X-ray diffraction. The complex crystallizes in the triclinicP\overline{1} space group with two symmetry-independent CdIIatoms, one of which lies on an inversion centre, and analysis of the crystal structure shows that both CdIIatoms are six-coordinated; the environment around one CdIIatom can be described as distorted octahedral, while that around the second CdIIatom is octahedral. The CdIIatoms are linked by chloride ligands to form a one-dimensional coordination polymer. The nonbonding intermolecular Cd...Cd distances are 3.7009 (4) and 4.3563 (5) Å. Furthermore, the photoluminescence properties of the complex have been investigated and it displays a strong red emission in the solid state at room temperature.

Kara, Hülya (Balikesir Author), Three Schiff base ligands were synthesized via condensation between 2,6-diformyl-4-R-phenol [where R = tert-butyl (HL1), iso-propyl (HL2), and chloro (HL3)] and N,N-dimethylethylene-1,2-diamine to prepare a series of copper(ii) complexes. [Cu-2(L-1)(OH)(ClO4)](ClO4) (1) and [Cu-2(L-1)(SCN)(3)] (2) were synthesized from HL1, whereas [Cu-2(L-2)(SCN)(2)](ClO4) (3) and [Cu-2(L-3)(N-3)(ClO4)](ClO4) (4) were obtained from the ligands HL2 and HL3, respectively. All the complexes were characterized by the usual physico-chemical techniques (FT-IR, UV-vis, single-crystal XRD, ESI-MS, H-1 NMR and EPR) and their variable temperature magnetic study was also carried out. Single-crystal XRD analysis proved that a phenoxyl bridge was present in all four complexes. Complexes 1 and 4 contained additional bridges as hydroxo and mu(1,1)-azido ligands, respectively, together with perchlorate species to generate new binuclear Cu-II complexes containing a triple-mixed bridge. Complex 2 formed a thiocyanate-bridged polymeric chain. Interestingly, a polymeric chain was also formed via the participation of perchlorate ions in the case of complex 3 although thiocyanate, a better bridging anion, was present as a pending co-ligand. The influence of the 'auxiliary part' of the ligands, i.e., the 'R' group towards the structural diversity of complexes 1-4 was evaluated with the help of a DFT study. A magnetic study revealed the fact that the copper centres were antiferromagnetically coupled in all four complexes. The catecholase activities of all four complexes were determined in a DMSO medium and complex 4 was found to be inactive. The order of the catecholase activity of the remaining three complexes was 1 < 2 approximate to 3. The trend of the catecholase activity was explained with the help of an ESI-MS study., Council of Scientific & Industrial Research (CSIR) - India - (09/028.1023)/2018-EMR-I Department of Science & Technology (India) - 327(sanc)/ST/P/S&T/15G-8/2016 dt 09/11/2016

A new dinuclear Fe(III) complex, [Fe(5-MeOL1)(OH)0.86(CH3O)0.14]2•2(CH3OH), [H2-5-MeOL1 = N,N′-bis(5-methoxy-2-hydroxybenzylidene)-2,2-dimethylpropane-1,3-diamine], 1 has been synthesized and characterized by single crystal structure analysis. The structure of 1 consists of two Fe(III) centers with one tetradentate schiff base ligand (N2O2) which are bridged by dihydroxo/dimethoxo groups to yield a Fe2O2 core. Complex 1 exhibits weak antiferromagnetic exchange interaction between Fe(III) ions with J = −0.21 cm–1.

Two new heterodinuclear Schiff base complexes, [Hg(L)NiCl2(DMF)(2)] 1, and [Zn(L)NiCl2(DMF)(2)] 2, where H2L = N,N'-bis(salicylidene)-1,3-diaminopropane and DMF = dimethylformamide have been synthesized and characterized using elemental analysis, IR spectroscopy, thermal analysis and X-ray diffraction. Structural studies on 1 and 2 reveal the presence of a heterodinuclear [(NiHgII)-Hg-II] unit and [(ZnNiII)-Ni-II] in which the central metal ions are connected to each other by two phenolate oxygen bridges. For complex 1 the Ni(II) ion adopts an elongated octahedral geometry (NiN2O4) while the Hg(II) ion assumes a distorted tetrahedral arrangement (HgO2Cl2) whereas for complex 2 the Zn(II) ion adopts an elongated octahedral geometry (ZnN2O4) while the Ni(II) ion assumes a distorted tetrahedral arrangement (NiO2Cl2). There are intermolecular C-H center dot center dot center dot Cl-M interactions among the dinuclear complexes which are interconnected for 1 and 2. These intermolecular interactions result in the formation of a three dimensional structure for 1 and one dimensional zig-zag chains for 2. (C) 2014 Elsevier B.V. All rights reserved.

0000-0002-2032-8930 WOS: 000446704800006 A new cubane-based cobalt(II) cluster, [Co4L4] (1), where H2L = 2-((E)-(2-hydroxyethylimino) methyl)-4-chlorophenol has been prepared using a solvothermal process and characterized by structural, optical and magnetism. The crystal structure of 1 consists of a tetranuclear Co4O4 core in an open-cubane framework. Each cobalt(II) ion is penta-coordinated in a distorted square pyramidal geometry (tau(Co1=Co1i) = 0.030, tau(Co2=Co2i) = 0.023). Furthermore, the photoluminescence analysis indicates that 1 has a strong blue emission which should be attributed to coordination of the metal to the ligand. The temperature dependence of the magnetic susceptibilities of 1 shows antiferromagnetic coupling (J= - 26.61 +/- 0.01) between cobalt(II) ions. Research Funds of Balikesir UniversityBalikesir University [BAP-2017/199] The authors are grateful to the Research Funds of Balikesir University (BAP-2017/199) for the financial support and Balikesir University, Science and Technology Application and Research Center (BUBTAM) for the use of the Photoluminescence Spectrometer. The authors are also very grateful to Prof. Dr. Andrea Caneschi (Laboratory of Molecular Magnetism, Department of Chemistry, University of Florence) for the use of SQUID magnetometer and helpful suggestions.

[Fe(SB)(H2O)]ClO4 and [NEt4]3[Fe(CN)6] react in methanol to give a cis cyano-bridged assembly, 3D [NEt4][Fe(5-ClL1)]2[Fe(CN)6] (5-ClL1H2 = N,N′-bis(5-chlorosalicylidenato)-2,2-dimethyl-1,3-diaminopropane), 1, and a trans cyano-bridged trinuclear complex, [NEt4][Fe(5-ClL2)(MeOH)]2[Fe(CN)6] (5-ClL2H2 = N,N′-bis(5-chlorosalicylidenato)-1,2-diaminopropane), 2, depending on the Schiff base used. Complexes 1 and 2 have been characterized by X-ray analyses and magnetic measurements. The four CN− in the equatorial plane of the [Fe(CN)6]3− moiety bridge four Fe ions each in the cis position, which results in a 3D neutral layered structure giving a [–Fe–NC–Fe–CN–Fe–] linkage for 1. The two CN− in the equatorial plane of the [Fe(CN)6]3− moiety bridge two Fe ions, in the trans position, which results in a hydrogen bonded 2D neutral layered structure for 2. Magnetic studies reveal that complex 1 exhibits weak intralayer ferromagnetic coupling, while complex 2 displays transition to a 3D ferromagnetic order between low-spin Fe(III) and high-spin Fe(III) through the cyanide bridges. Complex 2 further displays frequency-dependent alternating current magnetic susceptibility.

A new double end-on azide-bridged dinuclear nickel(II) Schiff base complex, [Ni-2(mu(1,1)-N-3)(2)(HL)(2)(MeOH)(2)], [HL = 2-[(2-hydroxypropylimino)methyl)-3,5-chlorophenoll has been synthesized and characterized by elemental analysis, UV and IR spectroscopy, single crystal X-ray diffraction, magnetic and photoluminescence study. The asymmetric unit contains half of the dinuclear unit. The Ni(HL) units in each dinuclear molecule are connected to each other by two bridging end-on azide ligands. In the crystalline architecture of the Ni(II) complex, intermolecular O-H center dot center dot center dot N hydrogen bonds link the molecules which form one-dimensional structure. Additionally, low temperature magnetic measurements indicate a dominant intradimer ferromagnetic interactions in double end-on azide-bridged dinuclear Ni(II) complex. Room temperature solid state photoluminescence measurements of Ni(II) complex show strong green emission band at lambda(max) = 508 nm while its free ligand H2L shows broad yellow emission band at lambda(max) = 594 nm. The luminescent performances making Ni(II) complex may be good candidates for potential luminescence materials. (C) 2017 Elsevier B.V. All rights reserved.

Two alkoxo-bridged copper(II) tridentate Schiff base complexes [{Cu(H2L1)}4] (1) [H2L1 = N-(2-hydroxyethyl)-3,5-di-tert-butylsalicylaldimine] and {Cu(H2L2)}4 (2) [H2L2 = N-(2-hydroxyethyl)-4-methoxysalicylaldimine] have been synthesized and structurally and magnetically characterized. X-ray diffraction studies show that 1 and 2 are tetranuclear alkoxo-bridged copper(II) complexes that contain a rather distorted Cu4O4 cubane core of 4+2 type (four short and two long Cu···Cu distances). The coordination of each copper ion can be described as a distorted square pyramid with one nitrogen and four oxygen atoms from three ligands. Variable-temperature magnetic susceptibility measurements on the two tetranuclear complexes 1 and 2 in the range 2–300 K indicate ferromagnetic exchange coupling between copper(II) centers. The magnetic susceptibility data were analyzed by using a simple two-J model with J′ and J″ representing the magnetic exchange couplings through the short and long Cu···Cu exchange pathways, respectively. The J values were as follows: J′ = +28.7 cm–1 and J″ = +7.8 cm–1 for 1, and J′ = +39.8 cm–1 and J″ = +10.2 cm–1 for 2. The sign and magnitude of the exchange coupling constants were justified on the basis of the structural geometric factors of the bridging Cu(O)2Cu fragments, the overlap of the magnetic orbitals, and DFT calculations.

Two novel binuclear Mn(III) [C22H26Cl4Mn2N2O6] (1) and Cu(II) [C26H14Cl4Cu2N2O4] (2) Schiff base complexes have been synthesized and their crystal structures have been determined by single crystal X-ray diffraction analysis. Structural analysis of (1) and (2) shows that the Schiff base ligand of dimers coordinates toward one metal atom in a tridentate mode and each Mn atom is six-coordinated while each Cu atom is four-coordinated. The two halves of the dimers are related by a crystallographic inversion center. The intramolecular non-bonding Mn⋯Mn separation is 2.994 A for complex (1) and Cu⋯Cu separation is 2.994 A for complex (2). Magnetic susceptibilities for (1) and (2) in the solid state have been measured over the temperature range 2–350 K as a function of temperature and the magnetic parameters have been determined with fitting procedure. Magnetic measurements on (1) and (2) reveal the presence of antiferromagnetic spin–exchange interactions between the transition metal ions.

Çoban, Mustafa Burak (Balikesir Author), Copper(II)-Schiff base complexes have attracted extensive interest due to their structural, electronic, magnetic and luminescence properties. The title novel monomeric CuII complex, [Cu(C10H11N2O4)2], has been synthesized by the reaction of 3-{[(3-hydroxypropyl)imino]methyl}-4-nitrophenol (H2L) and copper(II) acetate monohydrate in methanol, and was characterized by elemental analysis, UV and IR spectroscopies, single-crystal X-ray diffraction analysis and a photoluminescence study. The CuII atom is located on a centre of inversion and is coordinated by two imine N atoms, two phenoxy O atoms in a mutual trans disposition and two hydroxy O atoms in axial positions, forming an elongated octahedral geometry. In the crystal, intermolecular O - H...O hydrogen bonds link the molecules to form a one-dimensional chain structure and π-π contacts also connect the molecules to form a three-dimensional structure. The solid-state photoluminescence properties of the complex and free H2L have been investigated at room temperature in the visible region. When the complex and H2L are excited under UV light at 349?nm, the complex displays a strong green emission at 520?nm and H2L displays a blue emission at 480?nm.In a new monomeric CuII complex with 3-{[(3-hydroxypropyl)imino]methyl}-4-nitrophenolate ligands, intermolecular O - H...O hydrogen bonds link the molecules to form a one-dimensional chain structure and π-π contacts also connect the molecules to form a three-dimensional structure. The complex displays a strong green photoluminescence emission at 520?nm.

The synthesis, crystal structure and magnetic properties of [Mn(III)L(H2O)]2(H2O)(ClO4) (1)(L = N,N'-bis(rac-5-chlorosalicylidenato)-1,2-diaminopropane) are reported. Compound 1 consists of a structurally dinuclear system in which two Mn ions are bridged by the oxygen atoms of μ-phenoxo ligands. Low temperature magnetic susceptibility measurements show a ferromagnetic intra-dimer interaction with J = +1.75 cm−1, g = 2.01 and α = −0.32.

Kara, Hülya (Balikesir Author), Six N, N, O-donor Schiff-base ligands, HL1-HL6, [HL1/HL2/HL3= {2-(2-piperazin-1-yl) ethylimino) methyl)-4-(Cl/H/Me)-phenol}; HL4/HL5/HL6={2-(2-morpholine/piperidine/pyrrolidine 1-yl) ethylimino) methyl)-4-chlorophenol}, have been designed by combining 5-R-2-hydroxy-benzaldehyde, (R= Cl/H/Me) and N-(2-aminoethyl)- Y,(Y=piperazin/morpholine/piperidine/pyrrolidine) with the view to explore the role of R and X (part of Y excluding coordinating N) on the coordination chemistry of Cu (II) in presence of bromide as counter anion. HL1-HL6 formed in situ on reaction with Cu(II) Br-2 produce complexes 1-6, re-spectively. Complex 1, [Cu(II)(2)Cu(I)(2)(L1)(MeOH)(2)Br-7.30], is a mixed valence Cu(I)-Cu(II) species having phenyl ring brominated at ortho position with 0.65 occupancy. Complexes 2-4 are mononuclear species with general formula [Cu{L2/L3/L4)} Br2]. Complexes [Cu-3(L5)Br-4] (5) and [Cu-3(L6) Br-4] (6) are trinuclear species having similar structure but exhibit different magnetic property, 5 is ferro-(J= + 16.64 cm(-1)) and 6 is antiferromegnetic (J= -11.76 cm (-1)). The influence of R and X on bromonation, magnetic property and nuclearity issues have been rationalized by DFT calculations., MINECO of Spain CSD2010-0065 UGC/729/Jr Fellow(Sc) UGC, India

Yahşi, Yasemin ( Balikesir Author ), The mu-oxo-bridged Fe(III) dimer complex [{Fe(4-MeOL1)}(2)(mu-O)]center dot HOCH3, (H-2-4-MeOL1 = N,N'-bis(4-methoxy- 2-hydroxybenzylidene)-2,2-dimethylpropane-1,3-diamine), 1 is synthesized and characterized by single crystal X-ray diffraction. Complex 1 contains a [{Fe(4-MeOL1)}(2)(mu-O)] dimeric unit with a methanol solvent molecule of crystallization. Each Fe(III) ion has a distorted square-pyramidal coordination geometry. In the basal plane, the Fe(III) atom is coordinated by two N and two O atoms of the Schiff base ligand. The apical position is occupied by a bridging O2- ion, linking another Fe(III) ion in the complex. There are intermolecular C-H. O and C-H....pi interactions among the dinuclear complexes.

The synthesis, crystal structure and magnetic properties of [Mn(III)L(H2O)2]+ClO4 −, 1 [L = N,N′-bis(rac-3,5-dichlorosalicylidenato)-1,2-diaminopropane] are reported. Single crystal X-ray diffraction studies showed the structure to consist of [MnL(H2O)2]+ octahedra, with trans-coordinated water molecules, which are linked into infinite helices by hydrogen bonds. The distorted octahedral manganese(III) centre contains an N2O2O′2 coordination sphere made up of the Schiff base ligand in the equatorial plane. In the axial direction, an elongation of the trans Mn-Owater bonds to 2.165(2) and 2.187(2) Å is observed. Such elongations are typical of d4 systems but in this case may also be attributed to the poorer donor power of the water molecules.

A Schiff base complex N , N ′-bis(2-hydroxy-1-naphthylmethylidene)-1-methyl-1,2- diaminoethane- N , N ′, O , O ′-nickel(II) has been synthesized. The title compound has been characterized by FT-IR and UV–vis spectroscopies. The UV–vis experiments indicate that the compound has solvatochromism in the UV region, implying non-zero molecular first hyperpolarizability. To investigate microscopic second-order nonlinear optical (NLO) behavior of the examined complex, the electric dipole moments ( μ ) and the first static hyperpolarizabilities ( β ) were computed using Finite Field second-order Moller Plesset (FF MP2) perturbation procedure. According to ab initio quantum mechanical calculations, the title complex exhibits non-zero β values, revealing microscopic second-order NLO behavior.

A dinuclear Cu(II) species [Cu 2 L 2 (H 2 O) 2 (N 3 )](NO 3 ) 2 (L = 2,6-bis( N -ethylpyrrolidine-iminomethyl)-4-methyl-phenolato) where two Cu centers are bridged by phenoxido and μ 1,1 -azido bridges with Cu–Cu separation of ∼3 A have been synthesized with the view to explore the role of azido bridge on catecholase activity and electrochemical property and the roles of both the bridging groups on magnetic coupling of two copper centers. The complex exhibits excellent catecholase activity in acetonitrile as well as in DMSO medium not only by oxidizing 3,5-di- tert- butylcatechol (3,5-DTBC) but also tetrachlorocatechol (TCC), a catechol which is very thorny to oxidize, under aerobic conditions and becomes the first example of its own kind. CV study reveals three quasi-reversible reductive couples which are tentatively assigned as Cu 2 II to Cu II Cu I and Cu I Cu I reduction followed by reduction of Cu I Cu I complex to Cu 0 Cu 0 species. Variable temperature magnetic study suggests the presence of an antiferromagnetic spin–exchange interaction between Cu(II) ions in the dimer via double bridge where the antiferromagnetic contribution of phenoxido bridge predominates over the ferromagnetic interaction of azido bridge.

durmus, sefa/0000-0001-6974-513X; KARA, Hulya/0000-0002-2032-8930 WOS: 000332521000008 A single crystal of copper (II) complex (1) has been synthesized and its crystal structure has been determined by single crystal X-ray diffraction analysis and characterized by elemental analyses, IR spectroscopy, thermal analysis, H-1 NMR and C-13 NMR spectroscopy. The complex crystallizes in orthorombic space group Pnma, with unit cell dimensions a = 9.8944, b = 25.2972, c = 7.4457 angstrom, ss = 90 degrees. Structural analysis of (1) shows that the Schiff base ligand coordinates toward one metal atom in a pentadentate mode and each Cu atom is six-coordinated. The aliphatic oxygen atom of Schiff base ligand links the [CuL] moieties and creates polymeric zig-zag chain structure. In addition, magnetic susceptibilities for complex (1) have been measured over the temperature range 2-300 K and the magnetic parameters have been determined with fitting procedure. Magnetic measurements on (1) reveal the presence of antiferromagnetic exchange interactions between Cu(II) ions in the dimeric unit via bridging oxygen atoms of pentadentate Schiff base ligand. (c) 2014 Elsevier B.V. All rights reserved. Scientific and Technical Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TBAG-108T431]; TBAG-108T431 and Balikesir UniversityBalikesir University [2007/10]; Balikesir UniversityBalikesir University [2007/10] The financial support of the Scientific and Technical Research Council of Turkey (TUBITAK) Grants No: TBAG-108T431 and Balikesir University (Project No. 2007/10) is gratefully acknowledged. And Yasemin Yahsi is also grateful to Dr. Lorenzo Sorace, Dr. Andrea Caneschi and Laboratory of Molecular Magnetism (Department of Chemistry, University of Florence) for the use of Cryogenic S600 SQUID magnetometer and Xcalibur-3 diffractometer and helpful suggestions.

Phenoxo-bridged complexes [M(mu-L)Na(ClO4)(CH3OH)] (M = Cu(II) (1) and Ni(II) (2)) (H2L = N,N'-bis(3-methoxysalicylidenimino)-1,3-diaminopropane, C6H3(OMe)(OH)-CH = N-(CH2)(3)-N = CH-C6H3(OMe)(OH)) are structurally characterised by single-crystal X-ray diffraction study. M(II) appears in the square-plane geometry with MN2O2 coordination sphere, while the sodium ion exists with NaO6 distorted octahedral environment. The molecules pack in the solid-state forming three-dimensional arrays through C-H---O, O-H---O, C-H---pi, and pi---pi interactions. The spectral and redox properties are theoretically explained by DFT computation of optimised geometry of the complexes. (C) 2014 Elsevier Ltd. All rights reserved.

Metal complexes [Ni(HL1)(2)H2O] (1) and [Fe(HL1)(2)] (2), where HL1 is the tridentate Schiff base N-(2-hydroxyethyl)-5-nitrosalicylaldimine, were synthesized and characterized by spectroscopic methods. The crystal structures of 1 and 2 have been determined by single crystal diffraction at 100K. Complexes 1 and 2 have a distorted octahedral geometry. The ligand and metal complexes were screened for antibacterial and antifungal activities by the disk diffusion, microdilution broth, and single spore culture techniques. Antimicrobial activities of the ligand and its complexes have been tested against 10 bacteria, two yeast, and five filamentous fungi. The ligand and metal complexes were found to be active against all tested micro-organisms., Balikesir University - BAP-2010/122 Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) University of Bristol

Chiral one-dimensional hydrogen bonded copper(II) complex [Cu(HL1)Cl](2)center dot H2O (1) (HL1 = N-(2-hydroxyethyl)-5-nitrosalicylaldimine) has been synthesized and characterized by elemental analysis, crystal structure analysis and magnetic susceptibility. X-ray diffraction studies show that 1 is a binuclear copper(II) complex with a pair of chlorine atoms bridging the copper atoms in a central Cu2Cl2 core. Each copper(II) atom is five-coordinated in a square-pyramidal environment. Variable-temperature magnetic susceptibility measurements on the a binuclear complex 1 in the range 2-300 K indicate a weak antiferromagnetic coupling between the binuclear copper(II) centers, with J = -0.274 cm(-1) and the magneto-structural correlations are discussed in detail. (C) 2011 Elsevier B. V. All rights reserved.

Güngör, Elif (Balikesir Author), Two Schiff base ligands (HL1, HL2) and their Co(III) complexes, [Co(HL1)(L1)] (1) and [Co(HL2)(L2)] (2) [where HL1 = 2-((E)-(2-hydroxyethylimino)methyl)-4-chlorophenol and HL2 = 2-((E)-(2-hydroxyethylimino)methyl)-4-bromophenol] were synthesized and characterized using spectroscopic methods. The crystal structures of 1 and 2 have been re-determined by single crystal diffraction at 100K. The ligands and their Co(III) complexes were screened for antibacterial and antifungal activities by the disc diffusion, microdilution broth and single spore culture techniques. The antimicrobial activity of the Co(III) complexes and the free ligands exhibit antimicrobial properties and the Co(III) complexes show enhanced inhibitory activity compared with their parent ligand., Balikesir University Nato-B1-TUBITAK

A new hydrogen-bonded pseudo-dimer, [Mn(III)L1(CH3CH2OH)](2)(ClO4) (1) (L1 = N,N'-bis(2-hydroxy-1-naphthalidenato)-1,2-diaminopropane) has been synthesized and characterized by UV-vis, IR, elemental analysis and crystal structure analysis. The single crystal X-ray diffraction reveals that the structure affords an elongated octahedral MnN2O4 coordination environment, geometry with the four donor atoms of the tetradentate Schiff base in the equatorial plane and with two ethanol molecule in axial positions with Mn-O = 2.265(2) and 2.266(2) angstrom. (C) 2011 Elsevier B.V. All rights reserved.

yok, Kara, Hülya (Balikesir Author)

WOS: 000480362900496 …

Güngör, Elif (Balikesir Author), A cyano-bridged Mn(III)–Fe(III) complex, [Mn(L) (H2 O)]2 Fe(CN)6 ](NEt4 ) (1) (L = N,N′-bis(5- chlorosalicylidene)-1,2-diaminopropane) have been prepared and structurally and magnetically characterized.

Kara, Hülya (Balikesir Author), The synthesis and characterization of [Cu-2(L-1)(3,5 prz)] (L-1=1,3-Bis(2-hydroxy-3,5-chlorosalicylideneamino)propan-2-ol) 1 and of [Cu-2(L-2)(3,5 prz)] (L-2=1 3-Bis(2-hydroxy-bromosalicylideneamino)propan-2-ol) 2 are reported. The compounds were studied by elemental analysis, infrared and electronic spectra. The structure of the Cu-2(L-1)(3,5 prz)] complex was determined by x-ray diffraction. The magnetochemical characteristics of these compounds were determined by temperature-dependent magnetic susceptibility measurements, revealing their antiferromagnetic coupling. The superexchange coupling constants are 210 cm(-1) for 1 and 440 cm(-1) for 2. The difference in the magnitude of the coupling constants was explained by the metal-ligand orbital overlaps and confirmed by ab-initio restricted Hartree-Fock (RHF) calculations. In order to determine the nature of the frontier orbitals, Extended Huckel Molecular Orbital (EHMO) calculations are also reported.

Kara, Hülya (Balikesir Author), yok

The title compound, a hydrogen-bonded linear chain of pseudodimers, Mn(C19H19N2O4)(H2O)2]NO3·H2O, (I), has been determined. The complex affords an elongated octahedral MnN2O4 coordination environment, geometry with the four donor atoms of the tetradentate Schiff base in the equatorial plane and with two aqua ligands in axial positions with Mn-O = 2.238(4) and 2.256(3)A.

Kara, Hülya, The title compound, C23H26N2O2. 2H(2)O, displays strong intramolecular N-H ... O [2.637(2) Angstrom] and intermolecular O-H ... O [2.763(4) and 2.842(3) Angstrom] hydrogen bonds within each salicylideneimine unit and water molecule. The Schiff base has a twofold axis passing through the central C atom and therefore adopts a cis conformation.