Molecular complexes. Part XIX. Crystal and molecular structure of acenaphthene–7,7,8,8-tetracyanoquinodimethane molecular complex

Abstract

Crystals of the title 1 : 1 molecular complex are triclinic, a= 6·74, b= 16·88, c= 8·26 Å, α= 94·8, β= 92·0, γ= 95·3°, space group P, Z= 2. The structure has been determined by Patterson methods from diffractometer data and refined by least squares to R 0·063 for 2290 independent reflections. The dimensions of the component molecules have been corrected for rigid-body motion. The mode of overlap of the electron-donor and -acceptor molecules, which are stacked alternately plane-to-plane along the a axis of the crystal, is very close to that expected on the basis of maximisation of the donor–acceptor charge-transfer interaction.