Nickel(II), Copper(II) and Palladium(II) Complexes with Bis-Semicarbazide Hexaazamacrocycles: Redox-Noninnocent Behavior and Catalytic Activity in Oxidation and C-C Coupling Reactions.

Nickel(II), copper(II), and palladium(II) complexes , where M = Ni (), Cu (), Pd (), and , where M = Ni (), Cu (), Pd (), have been prepared by reactions of NiCl·6HO, Cu(OAc)·HO, and PdCl(MeCN) with 14-membered bis-semicarbazide hexaazamacrocycles and in dimethylformamide (DMF). The compounds were characterized by elemental analysis, ESI mass spectrometry, IR, UV-vis, and 1D (H, C) and 2D (H-H COSY, H-H TOCSY, H-H NOESY, H-C HSQC, H-C HMBC) NMR spectra (, , , and ), and X-ray diffraction (, -). The complexes with MN coordination environment have = 0, 1/2, 0 ground states for Ni, Cu, and Pd, respectively.