Synthesis and studies of Rh(I) catalysts within and across poly(alkyl aryl ether) dendrimers

Natarajan, Baskar and Jayaraman, Narayanaswamy (2011) Synthesis and studies of Rh(I) catalysts within and across poly(alkyl aryl ether) dendrimers. In: Journal of Organometallic Chemistry, 696 (3). pp. 722-730.

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Abstract

In order to study the efficiencies of catalytic moieties within and across dendrimer generations, partially and fully functionalized dendrimers were synthesized. Poly(alkyl aryl ether) dendrimers from zero to three generations, presenting 3 to 24 peripheral functionalities, were utilized to prepare as many as 12 catalysts. The dendrimer peripheries were partially and fully functionalized with triphenylphosphine in the first instance. A rhodium(I) metal complexation was performed subsequently to afford multivalent dendritic catalysts, both within and across generations. Upon synthesis, the dendritic catalysts were tested in the hydrogenation of styrene, in a substrate-to-catalyst ratio of 1:0.001. Turn-over-numbers were evaluated for each catalyst, from which significant increases in the catalytic activities were identified for multivalent catalysts than monovalent catalysts, both within and across generations. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Journal of Organometallic Chemistry
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Dendrimers; Hydrogenations; Organometallic catalysis; Rhodium
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	24 Mar 2011 12:05
Last Modified:	24 Mar 2011 12:05
URI:	http://eprints.iisc.ac.in/id/eprint/36189

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