Monofunctional and Difunctional Furan-Based 1,2,3,5-Dithiadiazolyl Radicals - Preparation and Solid-State Structures of 2,5-[(S2n2c)oc4h2(cn2s2)] and 2,5-[(S2n2c)oc4h2(cn)]
by Cordes, A. Wallace; Chamchoumis, Charles M.; Hicks, Robin G.; Oakley, Richard T.; Young, Kelly M.; Haddon, Robert C.
The preparation and solid state characterization of the bifunctional radical furan-2,5-bis(1,2,3,5-dithiadiazolyl) 2,5-[(S2N2C)OC4H2(CN2S2)] and the related monofunctional radical 2-cyanofuran-5-(1,2,3,5-dithiadiazolyl) 2,5-[(S2N2C)OC4H2(CN)] are described. The crystal structure of 2,5-[(S2N2C)OC4H2(CN2S2)] is orthorhombic, space group Pna2(1), and consists of interleaved arrays of dimers, for which the mean interannular S----S contact is 3.137 angstrom. The crystal structure of the monofunctional radical 2,5-[(S2N2C)OC4H2(CN)] is monoclinic, space group P 2(1)/n, and consists of a ribbon-like network of dimers (mean interannular S----S = 3.126 angstrom) interconnected by close head-to-tail CN----S contacts. The dimer units form stacks parallel to z, with a mean interdimer S----S separation of 3.956 angstrom. The similarities and differences between these two crystal structures and those of related benzene-substituted systems are discussed.
- Canadian Journal of Chemistry-Revue Canadienne de Chimie
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