tBuSiO(ReO4)4, a Model Compound for Metal Oxides on Silicate Surfaces—Synthesis from the Stable Triol tBuSi(OH)3 and Re2O7

Four ReO4 units each anchored to a silicon atom are found in the soluble metal-containing siloxane 1, accessible from the silanetriol tBuSi(OH)3 and Re2O7. The silanetriol does not undergo condensation reactions and can be prepared from tBuSiCl3 by hydrolysis in high yield. Compounds like 1 are interesting as model compounds for silicate supports bearing catalytically active transition-metal oxides.