| Popis: |
The reactions of OsH(Ph)(CO)L 2 (L = P t Bu 2 Me) with HSiMe 3 , H 2 SiPh 2 or H 3 SiPh produce benzene and OsH 3 (silyl)(CO)L 2 , which is characterized as a fac -H 3 OsP 3 shape capped on the H 3 face by the silyl group. For H 2 SiPh 2 and H 3 SiPh, these reactions are shown proceed through an intermediate Os(H) 2 (silylene)(CO)L 2 species. OsHF(CO)L 2 reacts with these silanes to give the same OsH 3 product (and silyl-F). These reactions can be combined to effect osmium catalysis of conversion of Si H + H 2 C CHF to fluorosilane and H 2 C CH 2 from OsH 3 (SiMe 3 )(CO)L 2 , or from the catalyst precursor OsHF(CO)L 2 . |
Full Text from ScienceDirect