The fully deprotonated anion of 1,3,5-benzene-triphosphonic acid: 1H, 31P, and 13C{1H} NMR and some comments on corresponding [AX]3 and AXX′2 spin systems and spectra.

The fully deprotonated anion of 1,3,5-benzene-triphosphonic acid 1,3,5-C6H3[PO32−]3 gives rise to deceptively simple 1H and 31P NMR spectra due to a corresponding [AX]3 spin system. The 13C{1H} NMR spectrum reveals two 13C isotopomers which are identified via AXX′2 systems. Results from analysis and iteration are described. [ABSTRACT FROM AUTHOR]