Enhanced reactivity of cationic vs neutral hafhocene complexes in stoichiometric and catalytic sigma-bond metathesis reactions involving Si-H and Si-C bonds

Authors
Sadow, AD Tilley, TD
Citation
Ad. Sadow et Td. Tilley, Enhanced reactivity of cationic vs neutral hafhocene complexes in stoichiometric and catalytic sigma-bond metathesis reactions involving Si-H and Si-C bonds, ORGANOMETAL, 20(22), 2001, pp. 4457-4459
Citations number
38
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
20
Issue
22
Year of publication
2001
Pages
4457 - 4459
Database
ISI
SICI code
0276-7333(20011029)20:22<4457:EROCVN>2.0.ZU;2-O
Abstract
A comparison of the cation-like complex CpCp*HfH(mu -H)B(C6F5)(3) with the neutral analogue CpCp*HfHCl reveals increased activity toward sigma -bond m etathesis for the more electrophilic, cationic complex. A catalytic transfo rmation of PhSiH3 to Ph2SiH2 and SiH4 by CpCp*HfH(mu -H)B(C6F5)(3) appears to occur by sigma -bond metathesis of the Si-C bond, which occurs concurren tly with dehydropolymerization to highly crosslinked polysilanes.