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Silica may be employed as a bidentate ligand to bis(neopentyl) fragments of titanium(IV) and zirconium(IV). The resulting supported organometallic complexes ( SiO) 2 M(CHCMe 3 ) 2 undergo thermolysis corresponding to their transformation to isolated neopentylidene complexes by extrusion of neopentane. The reactions are kinetically first-order and therefore deemed to be intramolecular...