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.

Fig. 1.

A view of the ionic unit of the title compound, showing the atom numbering and displacement ellipsoids drawn at the 50% probability level. H atoms are drawn with arbitrary radii. [Symmetry code: (i) -x+1, y, -z+0.5.]