The reactions of dichloroborane BHCl2 with 3,3,3-trifluoroprop-1-ene (TFP),
and propene have been studied using B3LYP method with 6-31G* basis set. Ba
sed on the calculations, all transition structures have parallelogram-like
H-B-CC four-center geometry with small deformations. The introduction of fl
uorine atoms changes the proportions of hydroborational products and revers
es the regioselectivity.