Dithiazolyl conductivity

Only 5 derivatives have been isolated to date. While the non-fused system forms a 71 -ji dimer (<7S s 3.27 A),86 structural studies on the more delocalised derivatives indicate a reduced tendency to dimerise. However, rather than forming optimal n-stacked motifs, there is a clear tendency to adopt slipped n-stack structures which minimise orbital overlap. As a consequence although the Hubbard energy is low, conductivity measurements show poor conductivities (10 5 S cm-1) similar to those observed in either the isomeric 1,3,2-dithiazolyl (4) or 1,2,3,4-dithiadiazolylradicals (2).84... 

Dispersion of the valence and conduction bands in the bis( 1,2,3-dithiazolyl) radical 14 has been determined by extended Htickel band structure calculations which suggest that the band gap (ca. 0.4 eV) has a value which is considerably smaller than that found in other radical dimer structures and arises from the weakness of the intradimer interaction <1999JA969>. 

Research in the reviewed period 1995-2005 has covered more the chemistry of 1,3,2-dithiazoles and less the chemistry of 1,3,2-dioxazoles. 1,3,2-Oxathiazoles and their derivatives were not investigated in this period. Much attention has been paid to the neutral 1,3,2-dithiazolyl radicals including their synthesis, theoretical and structural study, and application. Special attention was given to their magnetic properties and conductivity. 1,3,2-Benzodithiazole. Y-oxidcs were of interest as enantiomeric compounds and intermediates for the preparation of enantiopure amines and alcohols. 

Resonance-stabilized 1,2,3-dithiazolyls form TT-shpped stacks and show modest conductivity but with magnetically ordered phases. The... 

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