1,1-Dicyano-4-[4-(diethylamino)phenyl]buta-1,3-dienes: Structure–Property Relationships (pages 2756–2765)
Francesca Tancini, Yi-Lin Wu, W. Bernd Schweizer, Jean-Paul Gisselbrecht, Corinne Boudon, Peter D. Jarowski, Marten T. Beels, Ivan Biaggio and François Diederich
Article first published online: 22 MAR 2012 | DOI: 10.1002/ejoc.201200111
Increasingly cyanated 1,1-dicyano-4-(N,N-diethylanilino)-substituted buta-1,3-dienes were synthesized by unusual routes and characterized by X-ray analyses. Their opto-electronic properties strongly depend on both the number and position of the additional CN groups. Substitution in positions 2 and 4 affects the intramolecular charge-transfer bands more strongly than substitution in position 3, which is rationalized by theoretical calculations.