Addition of 1,2-dihaloperfluoroalkanes to various alkenes promoted by catalytic amounts of dichlorobis(π-cyclopentadienyl)titanium(IV) Cp2TiCl2 and iron powder gives 1:1 adducts in excellent yields. The reaction is performed in protic solvent (EtOH) without dehalogenation. A radical chain mechanism initiated by dichlorobis(π-cyclopentadienyl)-titanium(III) Cp2Ti(III)Cl is proposed.
在催化量的二
氯双(π-
环戊二烯基)
钛(IV)Cp 2 TiCl 2和
铁粉促进下,将1,2-二卤代
全氟链
烷烃加成到各种烯烃中,从而以优异的收率得到1:1的加合物。反应在质子溶剂(EtOH)中进行,无需脱卤。提出了由二
氯双(π-
环戊二烯基)-
钛(III)Cp 2 Ti(III)Cl引发的自由基链机理。