Reactions at Metal-Bound Nitrogen Atoms. Formation of Molybdenum and TungstenPhosphoraniminato Complexes from Silylimido Complexes and Synthesis of a Nitride-Bridged Tungsten Derivative

摘要

The chemistry of transition-metal complexes with organo-nitrogen ligands-amines,amidos, imidos, and hydrazidos-has been investigated by a number of chemists due to the relevance of these ligands to metal-promoted industrial and biological processes. In comparison, however, transition-metal complexes containing main-group-substituted nitrogen ligands-such as silylimidos and phosphoraniminatos have received much less attention. We have prepared a number of transition-metal silylimido derivatives and examined their reactions with transition-metal halides; formation of nitride-bridged products occurs readily and in extremely high yield for some silylimido complexes, but not at all for others.