Synthesis, spectral studies and X-ray crystal structure of N,N′-(±)-trans-1,2-cyclohexylenebis(3-ethoxysalicylideneamine) H2(t-3-EtOsalchxn)

✍ Scribed by Érica Tozzo; Sandra Romera; Mirian P. dos Santos; Marcia Muraro; Regina H. de A. Santos; L.M. Lião; L. Vizotto; Edward R. Dockal

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 422 KB
• Volume: 876
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2007.05.043

✦ Synopsis

The synthesis, spectra and X-ray crystal structure of N,N 0 -(±)-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 0 -(±)-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.