aluminium trichloride; chlorine in neat (no solvent) byproducts: CH3BCl2, CH2(BCl2)2; addn. of mixt. of B-compds. to NMR tube contg. freshly sublimed AlCl3, addn. of Cl2 gas, warmed from -190°C to room temp. for 3 h; not isolated; detected by NMR;

hydroboration;