Complexes of 1,2-dimethylimidazole with divalent cobalt, nickel, copper, and zinc

Abstract

The preparation is described of the compounds ML₄X₂(L = 1,2-dimethylimidazole; M = Co, X = I or NO₃; M = Ni, X = Cl, Br, I, or NO₃; M = Cu, X = Br or NO₃), ML₂X₂(M = Co, Ni, or Zn, X = Cl, Br, I, or NO₃; M = Cu, X = Cl or NO₃), CuL₃Cl₂ and ZnL₄(NO₃)₂,H₂O. Vibrational, electronic, and e.s.r. spectra and magnetic measurements are reported for these and structural information is deduced. The halogeno-complexes ML₂X₂ have pseudotetrahedral structures and CoL₄X₂ and ZnL₄(NO₃)₂,H₂O are probably tetrahedral. The compounds NiL₄X₂(X = Cl, Br, or I) are square and CuL₃X₂ is five-co-ordinate.