An ESR Study of the Radical Cations of Tetrathiafulvalene (TTF) and Electron Donors Containing the TTF Moiety
作者:Luka ?avara、Fabian Gerson、Dwaine O. Cowan、Knud Lerstrup
DOI:10.1002/hlca.19860690117
日期:1986.2.5
Hyperfine data and g factors are reported for the radical cations of tetrathiafulvalene (TTF; 1) and of its derivatives 2–13. From the intense satellite spectra of 1+–13+ not only the coupling constants of the 33S isotopes in the TTF moiety could be determined, but also, in favourable cases, those of the 13C isotopes in the central double bond. The former values range from 0.370 (8+) to 0.470 mT (4+) and the
报道了四硫富瓦烯(TTF; 1)及其衍生物2-13的自由基阳离子的超精细数据和g因子。从1 + – 13 +的强卫星光谱中,不仅可以确定TTF部分中33 S同位素的偶合常数,而且在有利的情况下,还可以确定中心双键中13 C同位素的偶合常数。前者的值范围为0.370(8 +)至0.470 mT(4 +),而后者的值范围为0.255(8 +)至0.360 mT(4 +))在二的自由基阳离子(亚乙基)-TTF(8 +)和四氰基-TTF(4 +)。TTF的自由基阳离子(1 +)显示出中间值,为0.425的33 S和0.285 mT的为13个Ç同位素。1 + – 13 +中的自旋种群在很大程度上位于π系统的中央S 2 C CS 2部分。它倾向于通过在TTF的2、3、6、7位上被电子接受(供体)基团取代而增加(减少)。