Synthesis and Characterization of Dinuclear and Tetranuclear Mixed-Spin Nickel(II) Complexes with 2,6-Bis(salicylideneaminomethyl)-4-methylphenol

Abstract

Abstract Dinuclear and tetranuclear nickel(II) complexes with 2,6-bis(salicylideneaminomethyl)-4-methylphenol (H3L), [Ni2(L)(pz)(Hpz)(CH3OH)]·CH3OH (1) and [Ni4(L)2(pz)2(CH3OH)] (2) (Hpz = pyrazole), have been synthesized and characterized by infrared and electronic spectra, and by temperature dependence of magnetic susceptibilities (80—300 K). The molecular structures of 1 and 2 were determined by single-crystal X-ray structure analysis. Complex 1 is a mixed-spin state complex in which one metal center is square planar and the other octahedral. Complex 2 has a zigzag tetranuclear structure, in which two dinuclear units with mixed spin-states are associated by two phenoxo-bridges and one methanol bridge.