Oxygen-17 NMR Spectra of Some Group VIB and VIIB Transition Metal Chalcarbonyl Complexes

Abstract
Although there are numerous reports in the literature on the 13C nmr spectra of transition metal carbonyls,1 little attention has thus far been focused on their 17O nmr spectra.2-4 Oxygen-17 nmr spectra are extremely difficult to obtain because of the quadrupolar nature of the 17O nucleus (I = 5/2) and its low natural abundance (0.037%). In addition, the low