Azomethine diselenides: Supramolecular structures and facile formation of a bis-oxazoline diselenide

A series of N2Se2 and N2Se2O2 acyclic Schiff base diselenides (3–9) have been synthesized by condensation of bis(o-formylphenyl) diselenide and amines (aniline, p-bromoaniline, benzylamine, ethanolamine, 1-aminopropanol, 2-aminophenol). The Schiff base diselenides were characterized by elemental analysis, ESI-MS, NMR (1H, 13C, 77Se) spectroscopy and X-ray crystallography. During crystallization compound 6 afforded bis(phenyloxazoline) diselenide 9via cyclization of Schiff base of ethanolamine. The supramolecular nature of these diselenides is studied by X-ray crystallographic structure analysis.