Syntheses and Crystal Structures of Two Novel Dinuclear Copper(II) and Zinc(II) Complexes Derived from Flexible Schiff Bases

Abstract

AbstractTwo novel structurally similar dinuclear Schiff base complexes, [Cu2(DMN)2(NCS)2] (1) and [Zn2(DMP)2(NCS)2] (2) (HDMN = 1‐[(3‐dimethylaminopropylimino)methyl]naphthalen‐2‐ol, HDMP = 2‐[(2‐diethylaminoethylimino)methyl]phenol), were prepared by an analogeous procedure and characterized by elemental analyses, infrared spectroscopy, and single crystal X‐ray determinations. Each metal ion in the complexes has a square‐pyramidal coordination. The distinct difference between the two structures is the basal and apical donor atoms. In 1, the Cu atom is coordinated by one O and two N atoms of one (DMN)−, ion as well as by one terminal N atom of a thiocyanate anion in the basal plane, and by one O atom of another (DMN)− ion at the apical position. The Cu···Cu separation is 3.080(2) Å. While in 2, the Zn atom is coordinated by one O and two N atoms of one (DMP)−, ion together by one O atom of another (DMP)− ion in the basal plane, and by one terminal N atom of a thiocyanate anion at the apical position. The Zn···Zn separation is 3.205(4) Å.