Browsing by Author "Burgos, Francisco"

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    New Rh derivatives of s-indacene active in dehydrogenative silylation of styrene
    (ELSEVIER SCIENCE SA, 2006) Esponda, Edgardo; Adams, Christopher; Burgos, Francisco; Chavez, Ivonne; Manriquez, Juan M.; Delpech, Fabien; Castel, Annie; Gornitzka, Heinz; Riviere Baudet, Monique; Riviere, Pierre
    The mono- and bimetallic complexes [(2,6-diethyl-4,8-dimethyl-s-indacenide){Rh(COD)}] (1), anti-[(2,6-diethyl-4,8-dimethyl-s-indacenediide) {Rh(COD)}(2)] (2a), syn-[(2,6-diethyl-4,8-dimethyl-s-indacenediide){Rh(COD)}(2)] (2b) were synthesized and characterized spectroscopically and in the case of complex 2b, by means of X-ray diffraction. The C-13 and Rh-103 NMR studies suggest that the bonding mode of the indacenediide ligand can be described as intermediate between eta(3)- and eta(5)-coordination. This result was confirmed by the crystal structure of 2b as evidenced by the slippage of the rhodium atom towards the periphery of the ligand. Cyclic voltammetry studies revealed a strong intermetallic communication through the fused ring ligand. This property was further illustrated by higher activity and selectivity of binuclear complexes 2 for the catalytic dehydrogenative silylation of styrene. (c) 2006 Elsevier B.V. All rights reserved.
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    Radical hydrometalation of functional ethylenic compounds : Radical autoinhibition changes the regioselectivity
    (2005) El Kadib, Abdelkrim; Feddouli, Amal; Rivière, Pierre; Delpech, Fabien; Rivière Baudet, Monique; Castel, Anne; Ahra, Mohamed; Hasnaoui, Aisa; Burgos, Francisco; Manríquez M., Juan Manuel; Chávez Madariaga, Ivonne