A convenient route to internally phosphane-stabilized aryltriborane(7) compounds

Abstract

The biphenylene derived triborane(7) derivatives 7 featuring an internal phosphane donor group can readily be prepared from the respective in situ generated aryllithium compound with excess BH₃·SMe₂. The internal donor group assisted assembly procedure was also applied to the synthesis of the phenylene bonded triborane(7) compound 11. These aryl-triborane(7) systems can further react with HB(C₆F₅)₂ to give the doubly C₆F₅ functionalized derivatives 12 and 13. The products were characterized spectroscopically and by X-ray diffraction.