Remarkable cage deboronation and rearrangement of a closo-1,12-dicarbadodecaborane to form a neutral nido-7,9-dicarbaundecaborane

摘要

Deboronation and cage rearrangement of the closo-1,12-arborane salt [1,12-(PPh_2Me)_2-1,12-C_2B_(10)H_]1_2 occurs in refluxing methanol to give the zwitterionic nido-7,9-carborane 7,9-(PPh_2Me)_2-7,9-C_2B_9H_9. Notably, deboronation and cage substitution of the isomeric doso-1,7-carborane salt [1,7-(PPh_2Me)_2-1,7-C_2B_(10)H_(10)]l_2 takes place in methanol to afford the salt [10-OMe-7,9-(PPh_2Me)_2-7,9-C_2B_9H_9]1.