Carborane Complexes of Ruthenium: Reactions of [Ru(THF)(CO)2(η5-7,8-R2-7,8-C2B9H9)] (R = H or Me) with Alkylidyne Complexes of Molybdenum and Tungsten
| Autor: | and Eric L. Sappenfield, J. C. Jeffery, Yi-Hsien Liao, Donald F. Mullica, F. Gordon A. Stone, Stephen Anderson |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Organometallics. 16:958-971 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | The complex [Ru(THF)(CO)2(η5-7,8-C2B9H11)] (1a, THF = tetrahydrofuran) reacts with the alkylidyne reagents [M(⋮CC6H4Me-4)(CO)2(η5-C5H5)] (M = Mo or W) to give the compounds [MRu(μ-CC6H4Me-4)(CO)4(η5-7,8-C2B9H11)(η5-C5H5)] (M = W (2a), Mo (2b)), which readily isomerize to the species [MRu(CO)4{σ,η5-9-CH(C6H4Me-4)-7,8-C2B9H10}(η5-C5H5)] (M = W (3a), Mo (3b)). The structure of 3b was established by X-ray diffraction. The Mo(CO)2(η5-C5H5) fragment is attached to the closo-RuC2B9 framework by a Mo−Ru bond and a three-center two-electron B−H⇀Mo linkage involving a boron atom in an α site in the CCBBB ring ligating the ruthenium. The CH(C6H4Me-4) moiety bridges between the Ru(CO)2 group and the B atom located in the other α site in the CCBBB ring. The oxo complex [WRuO{μ-σ,η5-9-CH(C6H4Me-4)-7,8-C2B9H10}(CO)2(η5-C5H5)] (4a) is a side product in the formation of 3a, and it also was characterized by X-ray diffraction. Treatment of the species 3 with PMe3 affords the zwitterionic compounds [MRu(CO)4{η5-9-CH(PMe3)(C6... |
| Databáze: | OpenAIRE |
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