Tetrathiafulvalene. XXII [1] Redox‐ und spektroskopische Eigenschaften von Tetrathiafulvalenen (TTF) und Tetraselenafulvalenen (TSF) sowie deren Mono‐ und Dikationen

Publisher Website
Google Scholar
Abstract
Tetrathiafulvalenes. XXII. Redox‐ and Spectroscopic Properties of Tetrathiafulvalenes (TTF) and Tetraselenafulvalenes (TSF) and their Mono‐ and DicationsThe polarographic oxidation potential of TTF is decreased by alkyl‐ and increased by aryl‐substituents. The oxidation potentials of arylated TTF can be correlated with σ+‐constants (σ  0,1). TSF are weaker donors than the respective TTF. Alkyl substitution at TTF causes a bathocromic shift and aryl substitution a hypsochromic shift of the longest wavelength absorption band. In the mono‐ and dications of TTF a bathochromic shift of this absorption band is observed by alkyl‐ as well as aryl‐substituents which is especially pronounced, when the molecule is planar.