Synthesis, spectral studies and X-ray crystal structure of N,N'-( ±)-trans-1,2-cyclohexylenebis(3-ethoxysalicylideneamine) H2(t-3-Etosalchxn)

Abstract The synthesis, spectra and X-ray crystal structure of N , N ′-(±)- trans -1,2-cyclohexylenebis(3-ethoxysalicylideneamine) H 2 ( t -3-EtOsalchxn), a salen-type ligand, are reported. The Schiff base was characterized by elemental analysis, m.p., IR, electronic spectra, 1 H and 13 C NMR spectra. The spectra are discussed and compared with those of N , N ′-(±)- trans -1,2-cyclohexylenebis(salicylideneamine), H 2 ( t -salchxn). The electronic and IR spectra were also resolved by deconvolution. The influence of the ethoxy group on the IR, electronic spectrum, 1 H and 13 C NMR spectra is discussed. Strong intramolecular forces are present as supported by the IR and 1 H NMR spectra and the X-ray crystal structure. An intermolecular hydrogen bond is observed and appears twice in a pair of molecules in the unit cell.