Assignment of multiline tungsten-183 NMR spectra of diamagnetic polyoxotungstates from intensity patterns

Measurement of relative integrated intensities and peak heights of multilin e one-dimensional W-183 NMR spectra of diamagnetic polyoxotungstates can re sult in complete or partial assignment of chemical shifts, even when W-183- W-183 spin-coupled satellites are not detectable or well-resolved. The inte nsity of the center peak of each signal is diminished according to the numb er and type (corner- vs edge-sharing of WO6 octahedra) of potential spin-co uplings. 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 b eta 1 and beta(3) isomers of [XW11O39](n-) are sufficiently different to al low identification.