Dinitrogen Cleavage Stemming from a Heterodinuclear Niobium/Molybdenum N₂ Complex: New Nitridoniobium Systems Including a Niobazene Cyclic Trimer

Abstract

Preparation of the terminal nitrido anion -[NNb(N[iPr]Ar)3] and the niobazene trimer {(μ-N)Nb(N[iPr]Ar)2}3 (iPr = CH(CH3)2 or CH(CD3)2, Ar = 3,5-C6H3Me2) entails cooperative splitting of dinitrogen upon reduction of the heterobimetallic paramagnetic dinitrogen complex (Ar[R]N)3Mo(μ-N2)Nb(N[iPr]Ar)3 (R = tBu or C(CD3)2 CH3).