A variable tempemture NMR study of carbonyldiphenylacetylene tris(r-cyclopentad3enylrhodium) and its bis(pentafluoropheny1) derivative
نویسنده
چکیده
The temperature-dependent ‘H and 13C NMR spect_ra of (hS-C.r.~Hs)3Rh3 (CO)C6H&sC6Hs support the view that this molecule is fluxional in solution at room temperature but is in a frozen conformation at -88”; NMR data of (h’-CsHs)sRh3 (CO) CeFsCsC6F5 indicate that this molecule appears to be static at room temperature and fluxional at elevated temperatures. The NMR data are consistent with structures, which have been determined by X-ray methods.
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تاریخ انتشار 2000