Tri­phenyl­methanol–tri­phenylphos­phine oxide (1/1)

In the crystalline 1:1 molecular complex of tri­phenyl­methanol (TPMeOH) and tri­phenyl­phosphine oxide (TPPO), C₁₉H₁₆O·C₁₈H₁₅OP, molecular dimers are formed which are linked by O—H?O=P hydrogen bonds. The dimers are aligned by sixfold phenyl embraces to form columns. The structure is disordered with half a dimer per asymmetric crystal unit, i.e. with only one molecular site which is half‐occupied by both TPMeOH and TPPO.