Dean M. Roddick, Richard H. Heyn, and T. Don Tilley" ... Chemistry Department, 0-006, University of California, San Diego, La Jolla, California 92093 ... The preparation and characterization of (THF)zLiSiHMesz (1, Mes = mesityl) are reported. Compound 1 reacts with Cp,Zr(Me)Cl (Cp = q5-C5H5) to afford thermally unstable Cp,Zr(SiHMes )Me (2), characterized ... Introduction The development of early-transition-metal silicon chemistry has been hampered by a lack ...