2,5-Bis(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-2,5-dihydroselenophe++ne (BEDTâBDTS), a selenophenoquinonoid-extended analogue of bis(ethylenedithio)tetrathiafulvalenes (BEDTâTTF), has been synthesized as a promising candidate for an electron-donating component of highTc organic superconductors. BEDTâBDTS is air-stable and has a significantly enhanced electron-donating ability compared with that of BEDTâTTF. The molecular and crystal structures of BEDTâBDTS have been determined by single crystal X-ray analysis in which short intermolecular SS contacts have been found in the side-by-side directions of the donor arrangements. A 1:1 TCNQ complex and a 3:1 I3â radical cation salt of BEDTâBDTS have been obtained and proved to exhibit fairly high room temperature conductivities.
2,5-双(4,5-乙撑二
硫-1,3-二
硫醇-2-亚基)-2,5-二氢
硒酚++(BEDT-BD
TS)是双(乙撑二
硫)
四硫富瓦烯(BEDT-
TTF)的
硒酚醌类扩展类似物,已合成为高Tc有机超导体电子供体组分的有前景候选物。BEDT-BD
TS具有空气稳定性,与BEDT-
TTF相比,其电子供体能力显著增强。BEDT-BD
TS的分子和晶体结构已通过单晶X射线分析确定,其中在供体排列的并排方向上发现了短分子间SS接触。已获得1:1 TCNQ复合物和3:1 I3- BEDT-BD
TS自由基阳离子盐,并证明其具有相当高的室温电导率。