An Asymmetrical Salamo-Type Chelating Ligand with Its Cobalt(II) Complex:Syntheses, Characterizations and Crystal Structures

Abstract

A salamo-type chelating ligand 4-chloro-6′-methoxy-2,2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol(H2L) and its complex [Co(L)(H2O)], have been synthesized and characterized by elemental analyses, IR spectra, UV-Vis spectra and X-ray single crystal diffraction method. The ligand crystallizes in the monoclinic system,space group P21/n with cell parameters: a=1.555 54(17) nm, b=0.470 55(5) nm, c=2.423 3(2) nm, β=106.108(2)°,Z=4, V=1.704 1(3) nm3, R1=0.055 3, wR2=0.063 3, and the Co髤 complex crystallizes in the orthorhombic system, space group Iba2 with cell parameters: a=1.934 27(14) nm, b=2.497 20(19) nm, c=0.752 96(5) nm, Z=8,V=3.637 0(5) nm3, R1=0.045 4, wR2=0.083 9, the Co髤 complex is mono-nuclear structure. The five-coordinated Co髤 atom of the complex lies in the N2O2 coordination sphere of one bis-oxime ligand, and the Co髤 atom of the complex has a slightly distorted trigonal bipyramid geometry, while the molecules also assemble to a 1D infinite chain-like supramolecular structure by intermolecular C8-H8…Cl1 hydrogen bond. CCDC: 940101,H2L; 940100,Co髤 complex.