Structures of tetracyanoethylene and its tricyanovinyl derivatives with intramolecular charge transfer: A review

The results of X-ray structure investigations of crystalline compounds with a tricyanovinyl group (individual substances, molecular complexes, and ionic salts) and related compounds are generalized. The most interesting geometric and conformational characteristics of the molecules and ions are discussed. Consideration is given to the crystal chemical features of the compounds involved. The structural formulas of 73 compounds and the reliability factors (R factors) of crystal structure determination are given in the tables. (C) 2002 MAIK Nauka/Interperiodica.