Copper(II) chloride–1-methylbenzotriazole chemistry: variation of product as a function of metal-to-ligand reaction ratio; synthesis, structure and properties of a dinuclear complex and a novel chain polymer with two alternating chromophores

Abstract

The 1 : 2 and 1 : 1 reactions of CuCl₂ with 1-methylbenzotriazole in EtOH–CH(OEt)₃ gave the doubly chloro-bridged dimer [Cu₂Cl₄(C₇H₇N₃)₄]1 and the novel alternating linear-chain polymer [{Cu₂Cl₄(C₇H₇N₃)₂}_n]2 respectively, crystal structures of which have been determined; magnetic susceptibility studies show that complex 1 possesses intramolecular- and complex 2 intrachain-ferromagnetic coupling.