Crystal Structure of Ethyltriphenylphosphonium Bis(α,α,α',α'-tetracyanoquinodimethanide)

Abstract

The crystal structure of the title compound, [EtPh₃P]⁺ [(C₁₂H₄N₄)₂]^-, has been established by single-crystal X-ray diffraction methods at 295(1) K and refined by least squares to a residual of 0·039 for 3047 'observed' reflections. Crystals are triclinic, Pī, a 8 ·882(7), b 13·522(5), c 15·927(6) Å, α 75·34(3), β 96·69(5), γ 100.56(3)º, Z 2. The structure closely resembles that of the methyl-triphenyl-phosphonium and -arsonium analogues, containing tetrads of α,α,α',α'- tetracyanoquino- dimethane* molecules, the molecular planes lying parallel to each other and approximately normal to b.