What is "trisphat"

Tributylammonium TRISPHAT is an organic salt with the formula [(CH)NH]+[P(OCCl)]. The anion features phosphorus(V) bonded to three tetrachlorocatecholate (CClO) ligands. This anion can be resolved into the enantiomers, which are optically stable (the picture shows the Δ enantiomer).

The TRISPHAT anion has been used as a chiral shift reagent for cations. It improves the resolution of H NMR spectra by forming diastereomeric ion pairs.