The difference in chemical shifts between the two geminal methyl protons of the isopropyl groups of three sulfonium tetrafluoborates free and complexed with Cr(CO)3, has been measured in a variety of solvents. The structure of tricarbonylchromium phenylisopropylmethyl sulfonium tetrafluoborate has been determined by a three-dimensional X-ray analysis. A tentative interpretation of the diastereotopic NMR shifts is given on the basis of the preferred conformations. © 1981.
Magnetic nonequivalence of methyl groups and x-ray structure of tricarbonylchromiumphenylisopropylmethylsulfonium tetrafluoro borate
CECCON, ALBERTO;GIACOMETTI, GIOVANNI;ZANOTTI, GIUSEPPE
1981
Abstract
The difference in chemical shifts between the two geminal methyl protons of the isopropyl groups of three sulfonium tetrafluoborates free and complexed with Cr(CO)3, has been measured in a variety of solvents. The structure of tricarbonylchromium phenylisopropylmethyl sulfonium tetrafluoborate has been determined by a three-dimensional X-ray analysis. A tentative interpretation of the diastereotopic NMR shifts is given on the basis of the preferred conformations. © 1981.
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