Synthesis and some properties of bis- and tetrakis(triphenylstannyl) tetrathiafulvalenes and tetraiodotetrathiafulvalene

Article abstract of DOI:10.1016/S0022-328X(96)06913-6

Bis- and tetrakis(triphenylstannyl)tetrathiafulvalenes were prepared from the corresponding lithio-derivatives and chlorotriphenyltin, and their structures were determined by X-ray analysis. Their absorption maxima in the electronic spectrum showed a bathochromic shift. Their redox potentials shifted only a little to a lower region. The charge-transfer complex of the tetra-substituted derivative with TCNQ was isolated. Bis(trimethylstannyl)tetrathiafulvalene did not react with (η-Cp)(CO)₂FeI and the reaction with (COD)PtCl₂, followed by addition of tributylphosphine, gave a complex mixture, from which (C₂H₂S₂)Pt(PBu₃)₂ was isolated in a low yield. The structure was confirmed by X-ray diffraction. A convenient preparation of tetrathiafulvalene and tetraiodotetrathiafulvalene is also reported.