Organometallic nitrosyl chemistry. Part II. Alkyl- and aryl-(η-cyclopentadienyl)dinitrosyl complexes of chromium, molybdenum, and tungsten

Abstract

Reactions of organoaluminium reagents with the chloro-complexes [(cp)M(NO)₂Cl](M = Cr, Mo, or W; cp =η-cyclopentadienyl) in benzene solution give the corresponding alkyl or aryl complexes [(cp)M(NO)₂R](R = Me, Et, Buⁱ, or Ph) in good yields. The factors affecting the success of this preparative route and the properties of these new organometallic products are discussed. A novel high-yield synthesis of [{(cp)Cr(NO)₂}₂] is also described.