Solid state 15N and 13C NMR study of dioxomolybdenum (VI) complexes of Schiff bases derived from trans-1,2-cyclohexanediamine

The 13C, 15N CP MAS NMR and FT-IR spectra of dioxomolybdenum (VI) complexes of trans-N,N0-bis-(R-salicylidene)- 1,2-cyclohexanediamine (R ¼ H, R ¼ 3,5-diCl, R ¼ 3,5-diBr, R ¼ 4,6-diOCH3), trans-N,N0-bis-(2-OH-naphthylidene)-1,2-cyclohexanediamine and trans-N-(salicylidene)-N0-(2-OH-naphthylidene)-1,2-cyclohexanediamine have been measured. Comparative analysis of the NMR and IR spectra of the complexes with those of the corresponding ligands has shown that the complexation of the di-Schiff bases leads to changes in the conformation of the ligands and the charge redistribution. The asymmetric structure and non-planar structure of the complexes have been suggested. q 2004 Elsevier B.V. All rights reserved.