Boron Trifluoride Acetonitrile Complex, Boron Trifluoride Diethyl Ether Complex ,Boron Trifluoride Methanol Complex ,Boron Trifluoride Tetrahydrofuran Complex, Boron Trifluoride Dimethyl Carbonate Complex, Boron Trifluoride Diacetic Acid Complex, Boron Trifluoride Dihydrate Complex and Boron Trifluoride Phenol Complex used as a chemical reagent and intermediate of medicine as well as catalyst