title: [4-(Dimethyl-amino)-phen-yl]diphenyl-phosphine selenide.
abstract: In the title compound, C(20)H(20)NPSe, the P atom lies in a distorted tetra-hedral environment. The Tolman cone angle is 157° indicating steric crowding at this atom. In the crystal, weak C-H⋯Se inter-actions create linked dimeric units and C-H⋯π inter-actions are also observed.
authors.affiliation: Research Centre for Synthesis and Catalysis, Department of Chemistry, University of Johannesburg (APK Campus), PO Box 524, Auckland Park, Johannesburg, 2006,  South Africa.
authors.forename: Wade L
authors.initials: WL
authors.lastname: Davis
authors.forename: Alfred
authors.initials: A
authors.lastname: Muller