Synthesis, stabilization, and applications of nanoscopic siloxane-metal particle conjugates
This account reports the new directions in the synthesis and characterization of polysiloxane-encapsulated metal nanoparticles and their applications to catalysis. These materials are prepared by sequestering metal ions with hydropolysiloxanes followed by
Chauhan, Bhanu P.S.,Rathore, Jitendra,Sardar, Rajesh,Tewari, Pankaj,Latif, Umar
Reactivity of Ir–NSiN Complexes: Ir-Catalyzed Dehydrogenative Silylation of Carboxylic Acids
This work describes the results from the studies on the potential of [Ir(μ-Cl)(cod)]2 (cod=1,5-cyclooctadiene) as metallic precursor for the preparation of Ir(NSiN) complexes (NSiN=fac-bis-(pyridine-2-yloxy)methylsilyl). The reaction of [Ir(μ-Cl)(cod)]2 with bis-(pyridine-2-yloxy)methylsilane enabled the synthesis of [Ir(H)(Cl)(NSiN)(η2-cod)] with an uncommon η2-coordination mode for the cod ligand. The application of Ir–NSiN species as catalysts precursors for the dehydrogenative silylation of carboxylic acids was also explored. The outcomes from these catalytic studies revealed a clear influence of the ancillary ligand on the catalytic activity of Ir–NSiN species. Thus, whereas [Ir(H)(CF3SO3)(NSiN)(coe)] shows poor catalytic activity, the related complex [Ir(H)(CF3CO2)(NSiN)(coe)] with a trifluoroacetate ligand was demonstrated to be a highly active catalyst precursor.
Julián, Alejandro,Garcés, Karin,Lalrempuia, Ralte,Jaseer,García-Ordu?a, Pilar,Fernández-Alvarez, Francisco J.,Lahoz, Fernando J.,Oro, Luis A.
p. 1027 - 1034
(2018/01/27)
PROCESS FOR THE PRODUCTION OF HYDROCARBYL SILYL CARBOXYLATE COMPOUNDS
A process for the production of hydrocarbyl silyl carboxylates of formula (I)is described. Wherein n represents a number of dihydrocarbylsiloxane units from 0 to 1000, by reaction of a carboxylic acid of formula (II) with a hydrocarbyl silyl compound of formula (III) the reaction being carried out in the presence of a silaphilic catalyst.
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Page 19-20
(2008/06/13)
An efficient Pd-catalyzed route to silyl esters
A one-step, highly selective catalytic route to silyl esters is reported. Commercially available silanes with Si-H functionality were converted to silyl or siloxy esters in the presence of Pd(OAc)2 under mild reaction conditions. This protocol was found to be equally applicable for the modification of multiple silicon centers in one framework and lead to the corresponding polysilyl esters in high yields. A comparison of catalytic efficiency of Pd(OAc)2 versus Pd on carbon was also undertaken.
Chauhan, Moni,Chauhan, Bhanu P. S.,Boudjouk, Philip
p. 1027 - 1029
(2007/10/03)
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