Pattanaik, Sandip published the artcileCobalt-Catalyzed Selective Synthesis of Disiloxanes and Hydrodisiloxanes, Recommanded Product: Triethylsilanol, the publication is ACS Catalysis (2019), 9(6), 5552-5561, database is CAplus.
Selective syntheses of sym. siloxanes and cyclotetrasiloxanes are attained from reactions of silanes and dihydrosilanes, resp., with H2O, and the reactions are catalyzed by a NNNHtBu Co(II) pincer complex. When phenylsilane was subjected to catalysis with H2O, a siloxane cage consisting 12 Si and 18 O centers was obtained and remarkably the reaction proceeded with liberation of 3 equiv of H2 (36 H2) under mild exptl. conditions. Upon reaction of silane with different silanols, highly selective and controlled syntheses of higher order monohydrosiloxanes and disiloxymonohydrosilanes were achieved by Co catalysis. The liberated H2 is the only byproduct observed in all of these transformations. Mechanistic studies indicated that the reactions occur via a homogeneous pathway. Kinetic and independent experiments confirmed the catalytic oxidation of silane to silanol, and further dehydrocoupling processes are involved in syntheses of sym. siloxanes, cyclotetrasiloxanes, and siloxane cage compounds, whereas the unsym. monohydrosiloxane syntheses from silanes and silanols proceeded via dehydrogenative coupling reactions. Overall these Co-catalyzed oxidative coupling reactions are based on the Si-H, Si-OH, and O-H bond activation of silane, silanol, and H2O, resp. Catalytic cycles consisting of Co(II) intermediates probably are operative.
ACS Catalysis published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Recommanded Product: Triethylsilanol.
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