Journal
CHEMICAL COMMUNICATIONS
Volume -, Issue 46, Pages 4898-4900Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b714731g
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Donor-substituted 1,1,2,4,4-pentacyanobuta-1,3-dienes and a cyclohexa-2,5-diene-1,4-diylidene-expanded derivative were prepared by a [2 + 2] cycloaddition of tetracyanoethene (TCNE) or 7,7,8,8-tetracyanoquinodimethane (TCNQ) to anilino-substituted cyanoalkynes, followed by retro-electrocyclisation; they feature intense bathochromically-shifted intramolecular chargetransfer bands and undergo their first one-electron reductions at potentials similar to those reported for TCNE and TCNQ.
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