Carbonyl-η-hexamethylbenzene complexes of osmium. Carbon-hydrogen activation by (η-C6Me6)Os(CO)(H)2 | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

8713061

Reference Type

Journal Article

Title

Carbonyl-η-hexamethylbenzene complexes of osmium. Carbon-hydrogen activation by (η-C6Me6)Os(CO)(H)2

Author(s)

Kiel, WA; Ball, RG; Graham, WAG

Year

1990

Is Peer Reviewed?

Yes

Journal

Journal of Organometallic Chemistry
ISSN: 0022-328X
EISSN: 1872-8561

Volume

383

Issue

1-3

Page Numbers

481-496

Language

English

DOI

10.1016/0022-328X(90)85149-S

Abstract

Reduction of (η-C6Me6)Os(CO)Cl2 (1) with zinc/acetic acid/methanol gives (η-C6Me6)Os(CO)(Cl)H (2), which can be further reduced with Na[H2Al(OCH2- CH2OCH3)2] to (η-C6Me6)Os(CO)H2 (3). Photolysis of 3 in hydrocarbons (benzene, cyclohexane, neopentane) results in formation of the carbon-hydrogen bond activation products (η-C6Me6Os(CO)(R)(H) (6a-6c, R = C6H5, C6H11 and CH2C(CH3)3, respectively) and free hexamethylbenzene. Independent syntheses of the hydrides 6a-6c are described as well as syntheses of the complexes (η-C6Me6)Os(CO)(R)2 (4a-4c) and (η-C6Me6)Os(CO)(R)Cl (5a-5c). The structure of (η-C6Me6)Os(CO)(cyclohexyl)2 (4b) determined by single crystal X-ray diffraction is reported. 1990.