Synthesis and 2D NMR characterization of Ni(II), Pd(II), and Cu(II) complexes with H2cdsalen (methyl-2{N-[2-(2’-hydroxyphenyl) methylidenenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate)

Abstract

Abstract: In this study we report on the preparation of Ni(II), Pd(II), Co(II), and Cu(II) complexes with H2cdsalen (methyl- 2{N-[2-(2’-hydroxyphenyl)methylidenenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate)salicylaldehyde. The products were characterized using 1D NMR (1H and 13C) and 2D NMR (COSY, NOESY, and ROESY) techniques. The conformational studies of the complexes with Ni and Pd in solution have been performed with help of the nuclear Overhauser effect (NOE) and 2D ROESY experiments.