Synthesis and crystal structures of two Schiff base copper(II) complexes derived from 4-chloro-2-[(2-morpholin-4-ylethylimino)methyl]phenol

A centrosymmetric mononuclear copper(II) complex, [Cu(L-1)(2)] (I), and a phenolate oxygen-bridged dinuclear copper(II) complex, [Cu-2(L-2)(4)] (II) (HL1 = 4-chloro-2-[(2-morpholin-4-ylethylimino)methyl]phenol, HL2 = 4-chloro-2-(cyclohexylimino-methyl)phenol), were synthesized and characterized by elemental analyses, IR, and single crystal X-ray diffraction. The crystal of I is monoclinic: space group {ITP}2(1)/n, a = 13.396(3), b = 5.339(1), c = 19.740(4) , beta = 108.64(3), V = 1337.8(5) (3), {ITZ} = 2. The crystal of II is monoclinic: space group P2(1), a = 9.157(2), b = 22.715(4), c = 12.169(2) , = 95.28(3), {ITV} = 2520.4(8) 3, {ITZ}= 2. The Cu atom in I, lying on the inversion center, is four-coordinate in a square planar geometry with two phenolate oxygen and two imine nitrogen atoms. Each Cu atom in II is five-coordinate in a square pyramidal geometry with two phenolate oxygen and two imine nitrogen atoms from two L-2 ligands defining the basal plane and with one phenolate oxygen atom of another L-2 ligand occupying the apical position.