Extensively conjugated tetrathiafulvalene (TTF) derivatives substituted with a TTF-fused 1,4-dithiafulven-6-yl group 4 have been synthesized. Theoretical calculation and X-ray crystal structure analysis of 4a demonstrated that the conformation A, in which the two TTF units are linearly oriented, is slightly more stable than the conformation B, which adopted orthogonal arrangement of two TTF units in the neutral state. Cyclic voltammetry revealed the presence of the intramolecular 1,5-S···S interaction that brings about the stabilization of the conformation B in the tricationic state.
研究人员合成了由 1,4-二
硫杂
富烯-6-基团 4 取代的
TTF 融合型广泛共轭四
硫杂
富烯(
TTF)衍
生物。4a 的理论计算和 X 射线晶体结构分析表明,两个
TTF 单元线性排列的构象 A 比两个
TTF 单元在中性状态下正交排列的构象 B 稍为稳定。循环伏安法揭示了分子内 1,5-S---S 相互作用的存在,这种作用使构象 B 在三方态中趋于稳定。