Coordination Polymeric Assemblies of some d‐Block Elements with Schiff Bases and its Characterization

A few coordination chain polymeric assemblies of the type [M(SB)(H₂O)₂]_n [M=Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II), H₂SB¹=1,1′‐dihydroxy‐2,2′‐(1‐isonitriloethylidyne ‐4‐nitrilomethylidenephenyl)diphenyl or H₂SB²=1‐thio‐1′‐hydroxy‐2,2′‐(1‐isonitriloethylidyne‐4‐nitrilomethylidenephenyl)diphenyl have been investigated. Structural and spectroscopic properties have been studied on the basis of elemental analyses, infrared spectra, ¹H‐NMR, ¹³C‐NMR, electronic spectra, magnetic measurements and thermogravimetric analyses. The Schiff bases act as binegative tetradentate ligands and bonding occur through the nitrogen and oxygen or sulfur atoms. An octahedral geometry has been assigned to all the prepared coordination polymers. The coordination polymers are insoluble in common organic solvents like benzene, acetone, ethyl acetate, methanol, ethanol, chloroform, dimethyl formamide and dimethyl sulphoxide.

Keywords:

• spectroscopy
• polymeric assemblies
• schiff base
• transition metal

5 Acknowledgements

The authors are thankful to Prof. J.S.Parmar, Head, Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, India, for providing the necessary laboratory facilities.