Abstract
Fluorine magnetic resonance and 19F{ 199Hg} resonance spectra of bis(perfluorovinyl)mercury and methyl(perfluorovinyl)mercury have been observed. Proton resonance and 1H{ 199Hg} spectra of methyl(perfluorovinyl)mercury and dimethylmercury have also been observed. The magnitudes and signs of all possible F-F, F-Hg, and H-Hg coupling constants in these three compounds have been determined. The spectrum of bis(perfluorovinyl)mercury calculated from the determined parameters is in excellent agreement with observation and the presence of long-range F-F coupling constants in this molecule, none of which are zero, verifies an earlier suggestion as to the reason for the complexity of the spectrum. The fluorine chemical shifts and F-F coupling constants within a perfluorovinyl group are within the previously reported range for these paramters. The mercury chemical shifts determined by INDOR spectroscopy are as follows: dimethylmercury 0 (reference), methyl(perfluorovinyl)mercury + 482 ± 3 ppm, bis(perfluorovinyl)mercury + 957 ± 3 ppm.
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