Abstract
The sterically demanding guanidine ArNHC(Me(2))NAr (Ar = 2,6-diisopropylphenyl, HL) reacts with Y(CH(2)SiMe(3))(3)(THF)(2) to give the yttrium dialkyl complex (L)Y(CH(2)SiMe(3))(2)(THF) (1), which was structurally characterized. Electronic interaction of the -NMe(2) group with the conjugated ligand backbone can be inferred from structural and spectroscopic data. The new yttrium guanidinate complex 1 and its related amidinate analogue [PhC(NAr)(2)]Y(CH(2)SiMe(3))(2)(THF) (2) are highly active and selective catalysts for alkene hydrosilylation with PhSiH(3) (tof > 600 h(-1) at 23 degrees C). For unfunctionalized olefins, full selectivity toward anti-Markovnikov products was obtained. The more electron donating guanidinate ligand affords the highest activities with heteroatom-functionalized substrates.
Original language | English |
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Pages (from-to) | 3131-3135 |
Number of pages | 5 |
Journal | Organometallics |
Volume | 27 |
Issue number | 13 |
DOIs | |
Publication status | Published - 14-Jul-2008 |
Keywords
- YTTRIUM ALKYL COMPLEXES
- PLATINUM(0)-CARBENE COMPLEXES
- OLEFIN HYDROSILYLATION
- ETHENE POLYMERIZATION
- LANTHANIDE
- CHEMISTRY
- METALS
- HYDROSILATION
- ETHYLENE
- HYDRIDES