1,4-Diselenantetracarbonyl complexes of chromium, molybdenum, or tungsten: chelate complexes of a cyclic ligand in the boat conformation

Abstract

The preparation and ¹H n.m.r. spectra are reported for the new complexes LM(CO)₄ where L is 1,4-diselenan and M is Cr, Mo, or W. The complexes are neutral monomeric species with a ligand in the boat conformation acting in a chelating mode and an analogy is drawn between these complexes and norbornane. The AA′BB′ n.m.r. spectra of the complexes have been analysed and chemical shifts and coupling constants are reported.