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A new dinuclear bromido-coordinated Schiff base zinc(II) complex, [Zn2Br2L1(MeOH)]·MeOH (1), and a new mononuclear bromido-coordinated Schiff base zinc(II) complex, [ZnBr2L2] (2), where L1is the dianionic form ofN,N’-bis(5-fluoro-2-hydroxybenzylidene)propane-1,3-diamine (H2L1), and L2is the zwitterionic form of 2-[(3-dimethylammoniopropylimino)methyl]-4-fluorophenol, have been preprared and characterized mainly by single-crystal X-ray diffraction. Complex 1 crystallizes in the monoclinic space groupP21/nwith unit cell dimensionsa= 10.0876(9) Å,b= 8.9549(8) Å,c= 26.586(2) Å, β = 95.134(2)º, V = 2391.9(4) Ǻ3, Z = 4,R1= 0.0547, andwR2= 0.1025. Complex 2 crystallizes in the monoclinic space groupP21/cwith unit cell dimensionsa= 7.359(1) Å,b= 13.798(2) Å,c= 17.676(2) Å, β = 114.602(2)º, V = 1631.8(4) Ǻ3, Z = 4,R1= 0.0877, andwR2= 0.2197. The inner Zn atom in 1 is five-coordinated in a square pyramidal geometry. The outer Zn atom in 1 and the Zn atom in 2 are four-coordinated in tetrahedral geometry. The crystals of the complexes are stabilized by intermolecular hydrogen bonds. [ABSTRACT FROM PUBLISHER]

A μ-oxido-bridged dinuclear iron(III) complex, [Fe2O(L1)2(L2)2], where L1and L2are the deprotonated forms of 2,4-dichloro-6-[(2-morpholin-4-ylethylimino)methyl]phenol and 3,5-dichlorosalicylaldehyde, respectively, has been prepared and characterized by elemental analysis, infrared spectrum, and single-crystal X-ray determination. The complex crystallizes in the triclinic space groupP, with unit cell dimensionsa= 10.670(1) Å,b= 11.585(1) Å,c= 19.748(2) Å, α = 86.766(2)°, β = 85.038(2)°, γ = 73.973(2)°,V= 2336.1(4) Å3,Z= 2, GOOF = 1.019,R1= 0.0422, andwR2= 0.1024. Structural analysis shows that the iron atoms in the complex are hexacoordinate with a normal Fe-O-Fe bridging angle of 150.84(13)°. Each Fe atom is coordinated by the NNO donor atoms of L1, OO donor atoms of L2, and one bridging O atom. The Fe· · ·Fe distance is 3.467(2) Å. [ABSTRACT FROM PUBLISHER]

Two new mononuclear Schiff base nickel(II) complexes, [Ni(ClSal)] (1) and [Ni(MeSal)] (2) (H2ClSal =N,N′-bis(3,5-dichlorosalicylidene)-1,3-pentanediamine; H2MeSal =N,N′-bis(3-methylsalicylidene)-1,2-ethanediamine), have been synthesized and characterized by elemental analyses, infrared spectra, and single-crystal X-ray diffraction. Complex 1 crystallizes in the orthorhombic space groupP212121, with unit cell dimensionsa= 9.788(1) Å,b= 10.206(1) Å,c= 20.458(2) Å,V= 2043.7(4) Å3,Z= 4,R1= 0.0814, andwR2= 0.1689. Complex 2 crystallizes in the monoclinic space groupP21/n, with unit cell dimensionsa= 11.6353(5) Å,b= 11.8807(6) Å,c= 12.8241(6) Å,β= 115.213(1)°,V= 1603.9(1) Å3,Z= 4,R1= 0.0243, andwR2= 0.0675. The Ni atoms in the complexes are four-coordinated in square planar geometry by the N2O2donor set of the ligands. [ABSTRACT FROM AUTHOR]

A pair of mononuclear Schiff base zinc(II) complexes, [ZnLCl2] (1) and [ZnLBr2] (2), have been prepared by the reaction of equimolar quantities of a new Schiff base ligand 2-[(2-dimethylammonioethylimino)methyl]-4-methylphenolate with ZnCl2and ZnBr2, respectively, in methanol. The structures of the complexes have been characterized by single-crystal X-ray diffraction. Complex 1 crystallizes as orthorhombic space groupP212121, with unit cell dimensionsa= 7.518(1) Å,b= 13.518(2) Å,c= 14.766(2) Å, V = 1500.7(3) Å3, Z = 4,R1= 0.0301,wR2= 0.0780, S = 1.028. Complex 2 crystallizes as orthorhombic space groupP212121, with unit cell dimensionsa= 7.731(1) Å,b= 13.761(1) Å,c= 14.705(1) Å, V = 1564.4(1) Å3, Z = 4,R1= 0.0230,wR2= 0.0488, S = 1.031. The Zn atom in each of the complexes is four-coordinated in a tetrahedral geometry by the phenolate O and imine N atoms of the Schiff base ligand, and two halide anions. Single crystals of the complexes are stabilized by hydrogen bonds. [ABSTRACT FROM AUTHOR]

A new mononuclear Schiff base cobalt(III) complex, [Co(MEA) (N3)(DMF)] (1), and a new mononuclear Schiff base manganese(III) complex, [Mn(EEA)(N3)(OH2)] (2) (MEA is bis (5-methoxysalicylidene)ethylenediamine; EEA is bis(6-ethoxys alicylidene)ethylenediamine), have been prepared and structurally characterized by physicochemical and single-cyrstal X-ray diffraction. Complex 1 crystallizes in the monoclinic space groupP21/cwith unit cell dimensionsa= 9.910(1) Å,b= 19.279(1) Å,c= 12.410(1) Å,β= 102.729(2)°, V = 2312.8(2) Å3, Z = 4,R1= 0.0319, andwR2= 0.0779. Complex 2 crystallizes in the monoclinic space groupP21/cwith unit cell dimensionsa= 14.252(2) Å,b= 22.227(3) Å,c= 13.613(2) Å,β= 91.512(2)°, V = 4310.7(11) Å3, Z = 8,R1= 0.0392, andwR2= 0.0839. The metal atom in each complex is in an octahedral coordination. Crystal of complex 2 was stabilized by hydrogen bonds. [ABSTRACT FROM PUBLISHER]

A new azido-bridged polymeric copper(II) complex, [CuL(μ1,3-N3)]n·2nH2O (1), and a new thiocyanato-bridged polymeric copper(II) complex, [CuL(μ1,3-NCS)]n(2) (L = 4-methoxy-2-[(2-morpholin-4-ylethylimino)methyl]phenolate), have been prepared and structurally characterized by elemental analysis, IR spectra, and single-crystal X-ray determination. Each Cu atom in the complexes is coordinated by three donor atoms of Schiff bases and by two atoms of the pseudohalide ligands, forming a square pyramidal geometry. Azide and thiocyanate anions are preferred bridging groups for the construction of polymeric copper complexes with Schiff bases. [ABSTRACT FROM AUTHOR]

A novel bromido- and azido-bridged dinuclear copper(II) complex, [Cu2Br2L2]·[Cu2Br(N3)L2]·H2O, where L is the deprotonated form of the Schiff base 4-chloro-2-[(2-hydroxyethylimino)methyl]phenol, has been prepared and structurally characterized by elemental analysis, IR spectra, and single crystal X-ray crystallography. Each Cu atom in the complex is coordinated by three donor atoms of Schiff base ligand and by two bridging atoms, forming a square pyramidal geometry. The bromide and azide ligands are preferred bridging groups for the construction of dinuclear copper complexes with Schiff bases. [ABSTRACT FROM AUTHOR]