SCHEDULED MAINTENANCE
The dipole moments of a number of 2-substituted 1,1-dicyanoethylenes have been measured. The moments are explained by a combination of two effects, partial charge separation and compression of the [graphic omitted] angle. From the data obtained with ω,ω-dicyanofulvenes it is concluded that in compounds (such as I and II) pseudoaromatic structures (such as Ia and IIa) contribute to the ground state of the molecules.
H. Weiler-Feilchenfeld, I. Agranat and E. D. Bergmann, Trans. Faraday Soc., 1966, 62, 2084 DOI: 10.1039/TF9666202084
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