Transition Metal Complexes of Diazenes, XVIII [1]. Reactions of 1,2-Diazetines and 1,2-Diazetine-N-oxides with Chromium and Tungsten Carbonyls

Abstract

Chromium and tungsten carbonyls react with 3,3,4,4-tetramethyl-1,2-diazetine (1) or its mono-N-oxide (2) to form complexes (1)M(CO)5, (1)2M(CO)4, (1)M2(CO)10, (1)2M2(CO)8, (1)3M2(CO)6 or (2)M(CO)5 and (2)2M(CO)4, resp. In the reactions of 2 some deoxygenation affords complexes of 1 as by-products. The stability of these and other complexes of the N=N group is related to the ring size of the cyclic diazene ligand.