Synthesis and Crystal Structure of the Copper(II) Complex with N,N'-Cyclohexanebis(3- formyl- 5-tert-butyl-salicylaldimine)

A mononuclear copper(Ⅱ) complex CuL with a Schiff-base L (H2L = N,N'-cyclohexanebis(3-formyl-5-tert-butyl-salicylaldimine)) has been synthesized and characterized.X-ray diffraction analysis at room temperature indicates that the complex (Cu C30H36N2O4, Mtr =552.15) crystallizes in tetrahedral system, space group P41 with α = 13.4685(6), c = 31.326(2) A,V= 5682.5(5)A3, Z = 8, Dc = 1.291 g/cm3, F(000) = 4656, μ (MoKα) = 0.805 mm-1. The final R and Rw factors are 0.0421 and 0.0815, respectively with 4435 observed reflections. The title complex is a neutral molecule in which the ligand is doubly deprotonated, forming a four-coordinated Cu(Ⅱ) complex by nitrogen and oxygen donors of the ligand and the coordination geometry of Cu(Ⅱ) could be considered as an approximately planar configuration.There are two independent molecules, having a transoid arrangement in this structure.