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A linear trinuclear complex of copper(II) with N,N′-bis(2-hydroxy-5-methoxybenzelidene)-1,3-diiminopropane

The synthesis and X-ray crystal structure of a linear phenolate-bridged Cu(II) complex 1 with a Cu–Cu bond distance of 2.9260(5) Å is reported. The complex consists of three Cu(II) ions with two molecules of the N,N′-bis(2-hydroxy-5-methoxybenzelidene)-l,3-diiminopropane ligand and two nitrate ions in such a manner that one ligand is connected with two Cu(II) ions. The complex is monoclinic, space group P21/n, with a = 10.6305(5), b = 13.0719(7), c = 14.6336(8) Å and β = 102.549(1)° at 293 K, Z = 2. The structure shows deprotonation of the phenolate oxygen to form a μ2 bridge. The magnetic moment (1.627 BM per Cu3 unit) at 300 K reveals that the spin doublet state is the ground state.