Organometallic surface catalysis

It is also interesting to compare this heterogeneous NP approach to that involving organometallic surfaces catalysis developed by Basset s group. In this approach, the catalyst is molecular and anchored to silica via Si-O-metal bridges. 

Basset, J. M., Gates, B. C., Candy, J. P., Choplin, A., Leconte, M., Quignard, E, and Santini, C. C., Surface Organometallic Chemistry Molecular Approaches to Surface Catalysis, NATO ASI Series, Kluwer, Dordrecht, 1988. 

Basset J-M, Gates BC, Candy J-P, Choplin A, Leconte M, Quignard F, Santini C (eds) (1988) Surface organometallic chemistry molecular approaches to surface catalysis. NATO ASl series, vol 231. Kluwer, Dordrecht... 

For example, many catalytic cycles involve the transfer of protons. Common intermediates are carbenium ions and carbanions, and the catalysts include soluble and solid acids and bases and enzymes. The catalytic cycles may be similar, whether the proton donor (or acceptor) is a soluble molecule or ion or a functional group on a surface. Similarly, catalysis proceeding via organometallic intermediates may involve soluble transition metal complexes, metalloenzymes, or metal surfaces. Catalysis by metals is, however, much more complicated than acid-base catalysis, and the analogies between soluble metal complexes and surfaces cannot yet be developed beyond a few selected examples. 

The structure of metal clusters is of importance to organometallic chemistry, catalysis and surface science. Silver clusters form the latent photographic image135. 

R.D. Adams and W.A. Herrmann (Eds.), Chemistry of Heteronuclear Clusters and Multimetallic Catalysts, Kdnigstein, Germany, September 1987 [Polyhedron Symposium-in-Print No. 8]. Polyhedron, 1988, 7 (22/23), pp. 2251-2463 J,-M. Basset, B.C. Gates, J.P. Candy, A. Choplin, M. Leconte, F. Quignard and C. Santini (Eds.), Surface Organometallic Chemistry Molecular Approaches to Surface Catalysis [NATO ASI Ser., vol. C231], Kluwer Dordrecht, 1988 P. Braunstein (ed.). Recent Advances in Di- and Polynuclear Chemistry, New J. Chem., 1988, 12 (6/7), pp. 305-720... 

BASSET, J. M., et al. (Eds.) - Surface Organometallic Chemistry Molecular Approaches to Surface Catalysis... 

The purpose of this chapter is not to make an extensive survey of the field of molecular clusters in coordination chemistry, a field which is expanding very rapidly in various directions, but to present a short introduction of the field of catalysis by clusters for the scientific community of surface catalysis. This community is not always aware of the progresses in molecular chemistry and more specifically in molecular clusters which are at the borderline between the solid state and the molecular state. The examples which will be given will be taken from reviews in the field of molecular clusters [1—5] in the field of catalysis by molecular clusters [6—7] as well as in the field of surface organometallic chemistry [8—14]. For a deeper approach of the fields considered, it is suggested to refer to those specialized review articles. 

It is obviously of importance for these studies to have a variety of means available for the incorporation of tritium into organic molecules. This is done using catalytic systems and is where the subject takes on a particular interest to the organometallic chemist. Indeed, the high sensitivity of H NMR makes it an ideal tool for the study of surface catalysis, an area of research which has already been reviewed, " or for the mechanistic study of metal catalyzed reactions. Tritiation can be carried out with... 

The systematic study of the reactivity of organometallic compounds with surfaces (e.g., of oxides, sulfides, zeolites, and metals) is expected to have the same impact on surface catalysis that organometallic chemistry has had on homogeneous catalysis. 

Surface Organometallic Chemistry Molecular Approaches to Surface Catalysis, 35 6. 

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