Abstract
In the title molecule, C21H21PSe or PSe(C7H7)3, the P atom has a distorted PSeC3 tetrahedral environment, formed by the Se atom [P=Se = 2.1119 (5) Å] and three aryl rings. Two short intramolecular C—H⋯Se contacts occur. In the crystal, weak intermolecular C—H⋯Se interactions link the molecules into zigzag double chains propagating in [100]. The previous report of this structure [Zhdanov et al. (1953 ▶). Dokl. Akad. Nauk SSSR (Russ.) (Proc. Nat. Acad. Sci. USSR), 92, 983–985] contained no geometrical data.
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