Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 9, Pages 2820-2823Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja1098066
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Funding
- Swedish Research Council
- European Research Council [ERC AdG 247014]
- Berzelius Center EXSELENT
- Knut and Alice Wallenberg foundation
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(13)CO exchange studies of racemization catalyst (eta(5)-Ph(5)C(5))Ru(CO)(2)Cl and (eta(5)-Ph(5)C(5))Ru(CO)(2)(Ot-Bu) by (13)C NMR spectroscopy are reported. CO exchange for the active catalyst form, (eta(5)-Ph(5)C(5))Ru(CO)(2)(Ot-Bu) is approximately 20 times faster than that for the precatalyst (eta(5)-Ph(5)C(5))Ru(CO)(2)Cl. An inhibition on the rate of racemization of (S)-1-phenylethanol was observed on addition of CO. These results support the hypothesis that CO dissociation is a key step in the racemization of sec-alcohols by (eta(5)-Ph(5)C(5))Ru(CO)(2)Cl, as also predicted by DFT calculations.
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