Dynamic nuclear magnetic resonance studies of complexes of 1,2-bis (benzylthio)ethane with chromium, molybdenum, and tungsten carbonyl complexes
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 19,p. 2015-2017
- https://doi.org/10.1039/dt9760002015
Abstract
Band-shape fitting studies have been made for the n.m.r. spectra of the benzylic methylene protons of the complexes [M(CO)4(bbse)][where M = Cr, Mo, or W; (bbse)= 1,2-bis(benzylthio)ethane]. These studies show that the coalescence phenomenon observed in the temperature-dependent n.m.r. spectra results not from reversal of the chelate rinq but from inversion of configuration about the ligand sulphur atoms. Thermodynamic activation parameters for this latter process are reported:Keywords
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