Supramolecular self-assembly and crystal structures of new zinc(II) complexes derived from 4-Methyl-2-[(2-methylaminoethylimino)methyl]phenol

Abstract

A new dinuclear zinc(II) complex, [Zn 2 Br 2 L 2 ] (I), was prepared from 4 methyl 2 [(2 methyl aminoethyl imino)methyl]phenol (HL) with zinc bromide in methanol. Self assembly of I with ammonium thiocyanate in methanol afforded the mononuclear complex [Zn(L)(HL)] 2 [Zn(NCS) 4 ] (II). Structures of complexes I, II have been characterized by elemental analysis, IR spectra and single crystal X ray diffraction (CIF files CCDC nos. 1046617 (I), 1046618 (II)). Complex I possesses a crystallographic two fold rotation axis symmetry, with Zn···Zn separation of 3.106(1) Å. Complex II contains two mononuclear zinc(II) com plex cations and one [Zn(NCS) 4 ] complex anion. The Zn(1) atom in I is in a tetrahedral coordination. The Zn(2) atom in I and the Zn atoms in II are in octahedral coordination. Crystals of I, II complexes are stabi lized by hydrogen bonds.