Published in
Elsevier, Tetrahedron Letters, 46(44), p. 8421-8425, 2003
DOI: 10.1016/j.tetlet.2003.09.100
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Kharasch addition catalysed by half-sandwich ruthenium complexes. Enhanced activity of ruthenacarboranes
Journal article published in 2003 by
Oscar Tutusaus,
Sébastien Delfosse,
Albert Demonceau,
Alfred F. Noels,
Clara Viñas,
Francesc Teixidor 
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Abstract
Ruthenium complexes of the type [RuH(η5-CB)(PPh3)2] {CB is a monoanionic charge-compensated carborane ligand such as [9-SR2-7,8-C2B9H10]− and [9-SR2-7-CH3-7,8-C2B9H9]−} efficiently catalyse the Kharasch addition of CCl4 across olefins and, with maximum total turnover numbers of 9000 and initial turnover frequencies of 1900 h−1 at 40°C, highly surpass their Ru–Cp# analogues in these reactions.