649760-18-9Relevant academic research and scientific papers
Nucleophilic attack on η3-allyl and η 2-tetrahydroborate complexes of ruthenium(II)
Chamberlain, Barbara,Duckett, Simon B.,Lowe, John P.,Mawby, Roger J.,Stott, J. Claire
, p. 2603 - 2614 (2007/10/03)
Reaction of [Ru(CO)(η3-C3H 5)Cl(PMe2Ph)2], 1, with CO and Ag+ yielded 2A and 2B, isomers of [Ru(CO)2-(η3-C 3H5)(PMe2Ph)2]+. Treatment of 2B with BH4- gave [Ru(CO)2(CH 2CH2CH2)(PMe2Ph)2], 7, and [Ru(η2-BH4)-(CO)H(PMe2Ph)2], 6, subsequently obtained from [Ru2(CO)2Cl 4(PMe2Ph)4] and NaBH4. Chloride attacked the metal in 2B, yielding [Ru(CO)2(η1-C 3H5)Cl(PMe2Ph)2], 8, which then reformed 1. Lability of the Ru-HB bond trans to hydride allowed nucleophilic access to the metal in 6, with low-temperature formation of [Ru(η 1-BH4)(CO)-H(L)(PMe2Ph)2] (11, 12, 13, L = PMe2Ph, CO, 4-methylpyridine, respectively). On warming with excess L, these gave H3B·L and [Ru(CO)(H) 2L(PMe2Ph)2] (5, 4, 14, respectively). For L = C2H4, low-temperature NMR studies revealed a rapid equilibrium between 6, C2H4 and [Ru(η 1-BH4)(CO)(η2-C2H 4)H(PMe2Ph)2], 16, with slower conversion to [Ru(η2-BH4)(CO)Et(PMe2Ph)2], 17. The Royal Society of Chemistry 2003.
