Search

Abstract: A series of new triorganotin(IV) pyridinecarboxylates with 6-hydroxynicotinic acid (6-OH-3-nicH), 5-hydroxynicotinic acid (5-OH-3-nicH) and 2-hydroxyisonicotinic acid (2-OH-4-isonicH) of the types: [R3Sn (6-OH-3-nic)·L] n (I) (R=Ph, L=Ph·EtOH, 1; R=Bn, L=H2O·EtOH, 2; R=Me, L=0, 3; R= n-Bu, L=0, 4), [R3Sn (5-OH-3-nic)] n (II) (R=Ph, 5; R=Bn, 6; R=Me, 7; R= n-Bu, 8), [R3Sn (2-OH-4-isonic·L)] n (III) (R=Bn, 9, L=MeOH; R=Me, L=0, 10; R=Ph, 11, L=0.5EtOH) have been synthesized. All the complexes were characterized by elemental analysis, TGA, IR and NMR (1H, 13C, 119Sn) spectroscopy analyses. Among them, except for complexes 5 and 6, all complexes were also characterized by X-ray crystallography diffraction analysis. Crystal structures show that complexes 1–10 adopt 1D infinite chain structures which are generated by the bidentate O, O or N, O and the five-coordinated tin centers. Significant O–H⋯O, and N–H⋯O intermolecular hydrogen bonds stabilize these structures. Complex 11 is a 42-membered macrocycle containing six tin atoms, and forms a 2D network by intermolecular N–H⋯O hydrogen. [Copyright &y& Elsevier]

The triethylammonium dicarboxylatotriorganostannates, [(C2H5)3NH][R3Sn(3,5-pdc)] · mH2O (3,5-pdc = 3,5-pyridinedicarboxylate) (m = 1, R = Me 1; m = 0, R = Ph 2, PhCH23, n-Bu 4), [(C2H5)3NH][R3Sn(5-nip)] (5-nip = 5-nitroisophthalate) (R = Me 5, Ph 6, PhCH27,n-Bu 8) have been prepared from triethylamine, 3,5-pyridinedicarboxylic acid, 5-nitroisophthalic acid and triorganotin chloride. Complexes 1–8 have been characterized by elemental, IR, 1H, 13C and 119Sn NMR analyses. Complexes 1, 2, 5 and 6 are also determined by single crystal X-ray diffraction. For 1, 2, 5 and 6, each carboxylate moiety is involved in coordination to a tin center via only one O atom showing that the Sn atoms are five-coordinate and exist in trigonal bipyramidal geometries. Moreover, for 2, 5 and 6, the nitrogen atoms of ammonium are hydrogen bonded to the pendant carboxyl oxygen. In 1, adjacent polymeric chains and triethylammonium are linked by hydrogen bonds through the co-crystallized water molecule, thus a 2D network is formed. [ABSTRACT FROM AUTHOR]

A cobalt complex constructed by the ligand(L): 4-hydroxy-3-methoxybenzaldehyde [Co(C8H7O3)2(H2O)2] has been synthesized and characterized by X-ray single crystal diffraction. The cobalt(II) atom is six-coordinate in a distorted octahedral geometry, intermolecular O-H•••O hydrogen bonds lead to the formation of a two-dimensional supramolecular network along ab plane. Its thermal stability was determined by TGA/DSC. Its two-photon absorption (TPA) cross-section σ2value and second hyperpolarizability γ value were determined to be 1.59 × 10−53(m4· s/photon · molecule) and 1.06 × 10−56(C · m4/V3) by Z-scan technique with 20 picosecond (ps) pulses at wavelength 1064 nm. The γ value is about six times larger than the time-dependent density-functional theory (TDDFT) calculation results. [ABSTRACT FROM AUTHOR]

Abstract: A copper complex constructed by the ligand: 1,3-dithiole-2-thione-4,5-dithiolato (DMIT) has been synthesized and its crystal structure has been determined by means of X-ray single crystal diffraction. The central copper(II) ion coordinates with two DMIT which constructed a square environment. Intermolecular C–H⋯S hydrogen bonds between cation groups and ligands lead to the formation of a two-dimensional supramolecular network. Its third-order nonlinear optical property has been studied using Z-scan technique at different peak laser irradiance with 20picosecond (ps) pulses at wavelength 1064nm. Its molecular second hyperpolarizability γ was determined to be 4.03×10−57 m4 CV−3. [Copyright &y& Elsevier]