Crystal and molecular structure of the 1 : 2 complex of methyltriphenylphosphonium with ααα′α′-tetracyano-3,7-naphthoquinodimethane, (Ph3PMe)+[(tnap)2]–

Abstract

Crystals of the title compound are triclinic with a non-reduced cell of a= 9.415(8), b= 14.606(12), and c= 18.893(15)Å, α= 68.07(7), β= 116.58(8), and γ= 117.36(8)°, Z= 2. The structure was solved from a three-dimensional Patterson function and refined in space group P. The final R factor is 0.12 for 2 514 reflexions. The tnap molecules are arranged in groups of four (tetrads) almost parallel and equally spaced (3.30 Å). Two consecutive tetrads are 3.46 Å apart. The crystal structure is built up from thick layers parallel to the ab plane containing the tnap tetrads and separated from one another by the cations. Within the layers the tetrads of tnap are disposed in columns parallel to the b axis. In the cation the phosphorus atom is tetrahedrally co-ordinated with a P–C(sp)³ 1.825 and mean P–C(sp²) 1.789 Å.