1,3-Bis[2-(dimethyl­amino­meth­yl)­phen­yl]­tris­elenide

The title compound, C₁₈H₂₄N₂Se₃, consists of discrete mol­ecules; owing to the presence of strong intra­molecular N...Se inter­actions [N...Se = 2.671 (4) and 2.873 (4) Å], the chalcogen Se atoms of the angular Se₃ chain exhibit different coordination geometries, i.e. the terminal Se atoms are tricoordinated and exhibit a T-shaped environment of the CNSe₂ core [N...Se—Se = 173.73 (9) and 172.29 (9)°], while the central Se atom is dicoordinated to the other two Se atoms, with an Se—Se—Se angle of 108.32 (2)°.