Nn. Sveshnikov et Mt. Pope, Assignment of multiline tungsten-183 NMR spectra of diamagnetic polyoxotungstates from intensity patterns, INORG CHEM, 39(3), 2000, pp. 591-594
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.