Inorganic Chemistry, Vol.50, No.7, 2726-2728, 2011
Exhaustive Chlorination of [B12H12](2-) without Chlorine Gas and the Use of [B12Cl12](2-) as a Supporting Anion in Catalytic Hydrodefluorination of Aliphatic C-F Bonds
The fully chlorinated closo-dodecaborate salt, Cs-2[B12Cl12] was prepared in high yield from Cs-2[B12H12] and SO2Cl2 in acetonitrile at refluxing temperature. [Ph3C](2)[Bi2Cl12] was obtained by simple metathesis reactions. Catalytic hydrodefluorination of benzotrifluoride sp(3) C-F bonds was accomplished using [Ph3C](2)[B12Cl12] as a precatalyst and Et3SiH as a stoichiometric reagent. Full consumption of the sp(3) C-F bonds in p-FC6H4CF3 and C6F5CF3 with a turnover number up to 2000 was achieved.