Tris(4-methylphenyl)phosphine selenide


R factor = 0.031; wR factor = 0.073; data-to-parameter ratio = 21.6. 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) A ˚ ] 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. Related literature For the previous structure determination, see: Zhdanov et al. (1953). For background to phosphorus- and seleniumcontainin

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