Intriguing substituent effect in modified Hoveyda–Grubbs metathesis catalysts incorporating a chelating iodo-benzylidene ligand

Michał Barbasiewicz; Krzysztof Błocki; Maura Malińska; Robert Pawłowski

doi:10.1039/C2DT32422A

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Dalton Transactions

Issue 2, 2013

The international journal for inorganic, organometallic and bioinorganic chemistry

Impact Factor 3.838 48 Issues per Year Indexed in MEDLINE

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Intriguing substituent effect in modified Hoveyda–Grubbs metathesis catalysts incorporating a chelating iodo-benzylidene ligand

Michał Barbasiewicz,*^a Krzysztof Błocki,^a Maura Malińska^a and Robert Pawłowski^a

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Faculty of Chemistry, Warsaw University, Pasteura 1, Warsaw, Poland
E-mail: barbasiewicz@chem.uw.edu.pl ;
Fax: +48 22 822 5996 ;
Tel: +48 22 822 0211

Dalton Trans., 2013,42, 355-358

DOI: 10.1039/C2DT32422A
Received 11 Oct 2012, Accepted 05 Nov 2012
First published online 06 Nov 2012

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Abstract
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A series of modified Hoveyda–Grubbs catalysts incorporating a chelating iodo-benzylidene ligand were prepared and characterized. The presence of electron-withdrawing ring substituents in the para position to the iodide was found to decrease the catalytic activity, revealing that dissociation of the RuI–Ar bond is not the rate-determining step.