Carborane bridged ferrocenyl conjugated molecules: synthesis, structure, electrochemistry and photophysical properties

Abstract

The reaction between alkynyl bridged bisferrocenyl derivatives and decaborane results in new symmetrical ferrocenyl substituted carboranes 8–11. All the new compounds have been identified and fully characterized by means of NMR and HRMS. The molecular structures of target compounds 8–11 were determined by single-crystal X-ray analysis. The electrochemistry studies of the ferrocenyl substituted carboranes are reported, and the results suggest that there is a considerable amount of electronic communication between the two ferrocenyls in these symmetrical conjugated oligomers. The thermodynamic stability of the mixed-valent species increases in the order 11 < 8 < 10 < 9.