Correction to Supporting Information for Delley et al., Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates

CHEMISTRY Correction to Supporting Information for “Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates,” by Murielle F. Delley, Francisco Núñez-Zarur, Matthew P. Conley, Aleix Comas-Vives, Georges Siddiqi, Sébastien Norsic, Vincent Monteil, Olga V. Safonova, and Christophe Copéret, which appeared in issue 32, August 12, 2014, of Proc Natl Acad Sci USA (111:11624–11629; first published July 7, 2014; 10.1073/pnas.1405314111).

The authors note that the legend for Fig. S5 appeared incorrectly. The SI has been corrected online.

Fig. S5.

(A) Initial rate of ethylene polymerization plotted against the degree of poisoning of [(≡SiO)₃Cr] with 4-picoline. (B) Transmission infrared spectra of [(≡SiO)₃Cr] treated with C₂H₄ (a) and C₂D₄ (b). Inset (c) is a zoom at 2,700–2,500 cm⁻¹ of (b) showing a band at 2,581 cm⁻¹ and at 2,609 cm⁻¹.