Inorganic Chemistry, Vol.39, No.3, 591-594, 2000
Assignment of multiline tungsten-183 NMR spectra of diamagnetic polyoxotungstates from intensity patterns
Measurement of relative integrated intensities and peak heights of multiline one-dimensional W-183 NMR spectra of diamagnetic polyoxotungstates can result in complete or partial assignment of chemical shifts, even when W-183-W-183 spin-coupled satellites are not detectable or well-resolved. The intensity of the center peak of each signal is diminished according to the number and type (corner- vs edge-sharing of WO6 octahedra) of potential spin-couplings. Application of the method is exemplified by analysis of spectra of alpha-[XW11O39](n-) and derivatives, alpha(2)-[P(2)W(17)o(61)](10-), and [As(4)w(40)O(140)](28-). Intensity patterns of the six-line spectra of the beta 1 and beta(3) isomers of [XW11O39](n-) are sufficiently different to allow identification.
Keywords:TWO-DIMENSIONAL W-183;MAGNETIC-RESONANCE;CHEMISTRY;HETEROPOLYTUNGSTATES;DERIVATIVES;SPECTROSCOPY;COMPLEXES;CATALYSIS;SHIFTS;P-31