Synthesis of hydride and alkyl compounds containing the Cp*Os([eta][sup 3]-allyl) fragment. Crystal structures of Cp*Os([eta][sup 3]-C[sub 8]H[sub 13])Br[sub 2] and [Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Me(H[sub 2]O)][BF[sub 4]]
- Univ. of Illinois, Urbana, IL (United States). School of Chemical Sciences
Treatment of Cp*[sub 2]Os[sub 2]Br[sub 4] with 3-bromo-2-methylpropene or 1,3-cyclooctadiene affords the 2-methylpropenyl and cyclooctenyl products Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Br[sub 2] and Cp*Os([eta][sup 3]-C[sub 8]H[sub 13])Br[sub 2], respectively. The monoalkyl complexes Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])MeBr and Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])(CH[sub 2]SiMe[sub 3])-Br can be generated by treating Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Br[sub 2] with MgMe[sub 2] or LiCH[sub 2]SiMe[sub 3]. The dimethyl complex Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Me[sub 2] can be synthesized from Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Br[sub 2] by addition of methyllithium. In contrast, addition of ethyllithium to Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Br[sub 2] yields the ethylene complex Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])([eta][sup 2]-C[sub 2]H[sub 4]) and a small amount of Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])H[sub 2]. The latter dihydride can be synthesized in better yield by treating Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Br[sub 2] with LiAlH[sub 4]. When the dimethyl complex Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Me[sub 2] is protonated with HBF[sub 4] in the presence of H[sub 2]O the aqua complex [Cp*Os([eta][sup 3]-C[sub 4]H[sub 7])Me(H[sub 2]O)][BF[sub 4]] is formed.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- OSTI ID:
- 5937175
- Journal Information:
- Organometallics, Vol. 18:17; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BROMIDES
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
FLUOROBORATES
HYDRIDES
OSMIUM COMPLEXES
BORON COMPOUNDS
BROMINE COMPOUNDS
COMPLEXES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties