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, Washington, DC (United States)
- OSTI ID:
- 696629
- Journal Information:
- Organometallics, Vol. 18, Issue 17; Other Information: PBD: 16 Aug 1999
- Country of Publication:
- United States
- Language:
- English
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