The rate constants for the reactions of OH radicals with fully fluorinated alkenes containing different numbers of -CF(3) groups next to olefinic carbon, CF(2)=CF(2), CF(2)=CFCF(3), CF(3)CF=CFCF(3), and (CF(3))(2)C=CFC(2)F(5), were measured between 230 and 480 K using the flash photolysis resonance fluorescence technique to give the following expressions: K(c2F4)(250-480 K) = 1.32 x 10(-12) x (T/298 K)(0.9) x exp((+600 K/T) cm(3) molecule(-1) s(-1), k(c3F6)(230-2 480 K) = 9.75 x10(-14) x (T/298 K)(1.94) x exp(+922 KIT) cm(3) molecule(-1) s(-)1, k(trans C4F8) (230-370 K) = 7.50 x 10(-14) x (T/298 K)(1.68) exp(+612 K/T) cm(3) molecule-1 s-1, k(cis-C4F8)(230-370 K) = 2.99 x 10(-14) x (T/298 K)(2.61) x exp(+760 KIT) cm(3) molecule(-1) s(-1), and k(C6F12)(250-480 = 2.17 x 10(-15) x (T/298 K)(3.90) x exp( 1044K/T) cm(3) molecule(-1) s(-1). The kinetics of the OH reaction in an industrial sample of octofluoro-2-propene (a mixture of the cis- and trans-isomers of CF3CF=CFCF3) was studied to determine the "effective" reaction rate constant for the typically industrial mixture: k(< C4F8 >)(230-480 = 7.89 x 10(-14) x (T/298K)(1.71) x exp(+557 K/T) cm(3) molecule(-1) s(-1). On the basis of these results, the atmospheric lifetimes were estimated to be 1.2, 5.3, 21, 34, and 182 days for CF(2)=CF(2), CF(3)CF=CF(2), trans-CF(3)CF=CFCF(3), cis-CF(3)CF=CFCF(3), and (CF(3))(2)C=CFC(2)F(5) respectively. The general pattern of halolalkene reactivity toward OH is discussed.