Rhodacarboranes containing σ- and π-carborane ligands. New aspects

Number of novel charge-compensated rhodacarboranes with pyridinium group was synthesized and characterized. Synthesis of 16-electron 3,3-mu-(1',2'-C2B10H10-1',2'-S-2-)-4-Py-3,1,2-RhC2B9H10 was accompanying by formation of several products. They were isolated and identified as two diastereomers of unusual dirhodacarboranes which contain two sigma-carboranyl and one s-dithiolate ligands 3,3-mu(3)-(1',2'-C2B10H10-1',2'-S-2-)-(4-Py-3,1,2-RhC2B9H10)(2). Structure of the DD/LL-isomer was determined by single crystal X-ray diffraction. Reaction the 16-electron complex with trimethylphosphine leads to corresponding 18-electron complex 3-PMe3-3,3-mu-(1',2'-C2B10H10-1',2'-S-2-)-4-Py-3,1,2-RhC2B9H10. Its structure was also confirmed by single crystal X-ray diffraction.

Automated summary

A series of novel charge-compensated rhodacarboranes with pyridinium group were synthesized and characterized, including two unusual dirhodacarboranes. The structure of one isomer was determined by single crystal X-ray diffraction.