The synthesis and properties of 1,3-dihydro-1,3-bis(dicyanomethylene)isothianaphthene 1 and its higher homologue 1,3-bis(1,3-dicyanovinylene)isothianaphthene 2 are reported; these compounds, which are the first electron acceptors of the isothianaphthene series, show electrochemical behaviour that contrasts with that of their thiophene analogues; the molecular structure of 1 was determined by X-ray analysis.
D. Lorcy, K. D. Robinson, Y. Okuda, J. L. Atwood and M. P. Cava, J. Chem. Soc., Chem. Commun., 1993, 345 DOI: 10.1039/C39930000345
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