Structure and spectroscopic properties of bis(N-cyclohexyl-3-methoxy-salicylideneiminato)copper(II)

Abstract

The structure of the title complex (2) has been determined from three-dimensional X-ray counter data. The material crystallizes in the monoclinic space group P2₁/c with two monomeric units in a cell of dimensions a= 11.793(5), b= 18.043(14), c= 6.484(3)Å, and β= 67.12(2)°. Least-squares refincment of 1 190 independent data has led to final values of R and R′ of 0.047 and 0.046, respectively. The monomeric units are crystallographically constrained to be square planar. The green solid yields reddish solutions in various solvents. Electronic and e.s.r. spectroscopic data support the presence of pseudo-tetrahedrally distorted species in solutions. Spectroscopic data for planar (2) are compared with data for pseudo-tetrahedral bis(N-cyclohexylsalicylidene-iminato)copper(II), (1). Structure-spectra correlations applicable to the solid state cannot necessarily be straightforwardly applied to solution species.