• S Bhaduri

      Articles written in Journal of Chemical Sciences

    • Homogeneous catalysis by ruthenium carbonyl clusters

      S Bhaduri K R Sharma H I Khwaja

      More Details Abstract Fulltext PDF

      The historical background of and the incentive for using ruthenium carbonyl clusters as homogeneous catalysts are outlined. Keeping in view the possible solutions the uncertainties arising from declusterification and metal colloid formation are discussed. All ruthenium cluster-catalysed reactions are broadly classified as reactions with or without carbon monoxide as one of the reactants and the basic differences between such reactions are highlighted. Some of the factors of special relevance to cluster-catalysed reaction systems are mentioned. The reactions involving carbon monoxide are then discussed. These include water-gas-shift reaction, carbon monoxide hydrogenation, hydroformylation, reductive carbonylation of nitrobenzene and other carbonylation reactions. Hydrogenation, transfer hydrogenation, isomerisation and a few other reactions are then discussed. For all these reactions, special emphasis is laid on well-characterised cluster complexes that have been proposed as catalytic intermediates. Finally an attempt has been made to identify the path that future research in cluster catalysis is likely to follow.

    • Carbonyl complexes as homogeneous and supported catalysts

      S Bhaduri

      More Details Abstract Fulltext PDF

      The use of carbonyl complexes in homogeneous and heterogeneous catalysis is very briefly presented. The demonstrated and expected advantages of such catalysts and the knowledge-gap in these areas of research are highlighted. The results obtained in the author’s laboratory, for two specific reactions — the carbonylation of nitrobenzene and transfer hydrogenation of organic carbonyl compounds with ruthenium carbonyl clusters as catalysts — are discussed. Where empirical and rigorous kinetic analyses are not possible, the usefulness of building hypothetical catalytic cycles with fully characterised clusters to rationalise observed activity and/or selectivity is emphasised. A summary of recent work on organic polymer supported mono- and polynuclear metal carbonyls is also presented.

    • Polyamino acids and cytochrome C anchored rhodium complexes

      Krishna Sharma Vishnu S Darshane Periyakaruppan T Manoharan S Bhaduri

      More Details Abstract Fulltext PDF

      Polyamino acids (amino acid = valine, alanine, lysine and arginine) and the protein cytochrome C (Cyt C) have been treated with [Rh(CO)2Cl]2 (1) to give polymersupportedcis-dicarbonyl species. The polymer-supported rhodium complexes, characterised on the basis of infrared and ESCA data, have been found to undergo reversible decarbonylation reaction. The Cyt C-supported rhodium complex acts as a hydrogenation catalyst of low to moderate activity. In the hydrogenation of 3-methyl cyclohexanone no stereoselectivity has been observed.

  • Journal of Chemical Sciences | News

© 2021-2022 Indian Academy of Sciences, Bengaluru.