First molecular conductors of BPDT-TTF with metallacarborane anions: (BPDT-TTF)[3,3′-Сr(1,2-C2B9H11)2] and (BPDT-TTF)[3,3′-Сo(1,2-C2B9H11)2] – Synthesis, structure, properties

New Radical-Cation Salts Based on the TMTTF and TMTSF Donors with Iron and Chromium Bis(Dicarbollide) Complexes: Synthesis, Structure, Properties

“…Transition metal bis(dicarbollide) complexes [3,3 -M(1,2-C 2 B 9 H 11 ) 2 ] − (M = Fe, Co, or Ni) are of great interest as counterions for the synthesis of TTF-based molecular conductors due to the unique high stability, possibility of tuning the charge and nature of the metal, and wide range of options for modification with dicarbollide ligands via hydrogen substitution by other atoms and functional groups [5,6]. Although most of the compounds studied were BEDT-TTF-based radical-cation salts, recently, we have synthesized radical-cation salts based on such unconventional and rather exotic donors as bis (1,3-propylenedithio)tetrathiafulvalene [8,9], dibenzotetrathiafulvalene [10], and 4,5-ethylenedithio-4 ,5 -(2-oxa-1,3-propylenedithio)-tetrathiafulvalene [9]. On the other hand, although compounds of the composition (TMTXF) 2 Y (X = T, S) are usually classical organic metals among which the first organic superconductors were discovered [4,7], and TMTTF and TMTSF radical-cation salts continue to attract the attention of researchers [11][12][13][14][15], very little attention has been paid to TMTTF and TMTSF radical-cation salts with metallacarborane anions [16][17][18][19].…”