S. Hida et al., SYNTHESIS OF TRI(M-SULFONATEDPHENYL)PHOSPHINE (TPPTS) - THE IMPORTANCE OF PH IN THE WORK-UP, Journal of coordination chemistry, 43(4), 1998, pp. 345-348
Controlling the pH during workup allows synthesis of TPPTS, P(m-C6H4SO
3Na)(3), without interference from the oxide. The recrystallized yield
is 70% based on P(m-C6H4SO3Na)(3) . 3H(2)O from PPh3.