title: Bis(triphenyl-λ-phosphanylidene)ammonium hydrogen dichloride.
abstract: In the title compound, [(Ph(3)P)(2)N](+)·[Cl-H-Cl](-) or C(36)H(30)NP(2) (+)·Cl(2)H(-), the H atom of the [Cl-H-Cl](-) anion and the N atom of the [(Ph(3)P)(2)N](+) cation are located on a twofold axis, yielding overall symmetry 2 for both the cation and the anion. The central P-N-P angle [144.12 (13)°] of the cation is in the expected range and indicates only weak cation-anion inter-actions. The almost linear [Cl-H-Cl](-) anion is a rare example of a symmetric hydrogen bridge in a hydrogen dichloride anion. The Cl⋯Cl distance and two equal Cl-H bonds are typical of such a symmetric hydrogen dichloride anion.
authors: Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg i. Br.,  Germany.
authors: Jorit
authors: J
authors: Gellhaar
authors: Carsten
authors: C
authors: Knapp