Addition/Correction pubs.acs.org/JACS
Retraction of “Bimetallic Effects for Enhanced Polar Comonomer Enchainment Selectivity in Catalytic Ethylene Polymerization” Brandon A. Rodriguez, Massimiliano Delferro, and Tobin J. Marks* J. Am. Chem. Soc. 2009, 131, 5902−5919. DOI: 10.1021/ja900257k The authors have been unable to reproduce the synthesis and spectroscopic characterization of the ethylene/acrylate copolymer described in this article. Accordingly, the authors are retracting this publication due to concerns over the validity of the aforementioned data. The authors regret any confusion that may have been created by publication of this work. In contrast, the results reported in related publications regarding the synthesis of a binuclear catalyst and its ethylene homopolymerization properties,1 and on ligand steric and fluoroalkyl substituent effects on enchainment cooperativity and stability in bimetallic nickel(II) polymerization catalysts,2 have been reproduced.
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REFERENCES
(1) Rodriguez, B. A.; Delferro, M.; Marks, T. J. Organometallics 2008, 27, 2166−2168. (2) Weberski, M. P.; Chen, C.; Delferro, M.; Marks, T. J. Chem. Eur. J. 2012, 18, 10715−10732.
Published: November 5, 2013 © 2013 American Chemical Society
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dx.doi.org/10.1021/ja409590r | J. Am. Chem. Soc. 2013, 135, 17651−17651
