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Most Intriguing Documents 4Q07-Chemistry and Related Science

Following is one of the journal documents most requested by researchers using CAS online services.

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CAS indexed 28 chemical substances from this document. CAS subject entries for this document include: Dendrimers; Polymerization; Polymerization catalysts; and 2 additional concepts

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TITLE:	Hyperbranched Macromolecules via Olefin Metathesis
AUTHOR(S):	Gorodetskaya, Irina A.; Choi, Tae-Lim; Grubbs, Robert H.
CORPORATE SOURCE:	Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
SOURCE:	Journal of the American Chemical Society (2007), 129(42), 12672-12673 CODEN: JACSAT; ISSN: 0002-7863
PUBLISHER:	American Chemical Society
LANGUAGE:	English

ABSTRACT:
A facile route to hyperbranched polyalkenamer-polyesters via acyclic diene metathesis polymn. is reported. Any mol. functionalized with two or more acrylate groups and one terminal olefin can serve as an ABn monomer when exposed to an imidazolinylidene-based ruthenium olefin metathesis catalyst, due to the cross metathesis selectivity of this catalyst. For the polymers obtained by this method, both 1H NMR spectroscopy and triple detector size exclusion chromatog. conclusively indicate a branched architecture.