Journal
ORGANOMETALLICS
Volume 27, Issue 24, Pages 6570-6578Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om800816q
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- National Science Foundation [CHE-0554734]
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An X-ray structural study of Mo(NAd)(CHCMe2Ph)(2,5-Me2NC4H2)(2) (1; Ad = 1-adamantyl) reveals it to contain one eta(1)-2,5-Me2NC4H2 ring and one eta(5)-2,5-Me2NC4H2 ring. The structures of Mo(NAr)(CHCMe2Ph)(pyrrolide)(2) (Ar = 2,6-i-Pr2C6H3) complexes that contain 2,3,4,5-tetramethylpyrrolides, 2,5-diisopropylpyrrolides, or 2,5-diphenylpyrrolides are analogous to that of 1. In contrast, Mo(NAr)(CH2CMe2Ph)(indolide)(2) (6) was shown to contain two eta(1)-bound indolides. Monohexafluoro-t-butoxide pyrrolide (MAP) species can be prepared, either through addition of one equiv of Me(CF3)(2)COH to a bispyrrolide or through reactions between the lithium pyrrolide and the bishexafluoro-t-butoxide. A trimethylphosphine adduct of a bispyrrolide, Mo(NAd)(CHCMe2Ph)(eta(1)-NC4H4)(2)(PMe3), has been prepared and structurally characterized, while a PMe3 adduct of MAP hexafluoro-t-butoxide species was found to have PMe3 bound approximately trans to the pyrrolide. This adduct serves as a model for the structure of the initial olefin adduct in olefin metathesis.
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