A Heterobinuclear Cu(II)-Ni(II) Complex Of A macrocyclic oxamide: Synthesis, Crystal Structure, Spectroscopic And Magnetic Properties

摘要

A novel oxamido-bridged heterobinuclear copper(II)-nickel(II) complex [(CuL)Ni(tmd)_2] (C1O_4)_2 (L = the dianion of 2,3-diono-5,6,14,15-dibenzo-7,13-bis(ethoxycarbonyl)-l,4,8,12-tetraazacyclotetradecane-7,I2-diene, tmd= 1,3-diaminopropane) has been synthesized and characterized structurally and magnetically. Single-crystal X-ray analysis reveals that the four-coordinate copper(H) center displays slightly distorted planar geometry and is linked to nickel(II) through the exo-cis oxygen atoms of the oxamido macrocyclic ligand; the six-coordinate nickel(II) center assumes a distorted octahedral environment. Spectroscopic and magnetic properties are discussed.