However, triphenylphosphine (pKa 2.73) is more basic than triphenylamine (pKa −5), mainly because the lone pair of the nitrogen in NPh3 is partially delocalized into the three phenyl rings.
Međutim, trifenilfosfin (pKa 2,73) je bazniji od trifenilamina (pKa −5), uglavnom zato što je slobodni par azota u NPh3 delom delokalizovan u tri fenilna prstena.