Patent ID: 7888538

Claim:
A process for the preparation of a compound of Formula (I) R f [C(X 1 X 2 )C(Y 1 Y 2 )] n I (I) wherein each X 1 , X 2 , Y 1 , and Y 2 is independently fluorine, hydrogen, fluoroalkyl, or fluoroalkoxy; n is 1, 2, or 3; and R f is a perfluorinated or partially fluorinated carbon chain optionally interrupted with catenary oxygen or catenary sulfur; comprising contacting, at a temperature of a maximum of 150° C. and at an initial rate of a minimum of 0.01 mole/hour, a partially fluorinated olefin with a fluoroalkyl iodide R f I wherein R f is defined as above, in the presence of a catalyst, wherein said catalyst is iii) Ni(Z) m wherein each Z is independently PR 3 ; m is 2 to 4; R is phenyl, alkyl substituted phenyl, or C r H 2r+1 ; and r is 1 to 10; or iv) a mixture of Ni and Z wherein Z is as defined above, to yield a compound of Formula (I) with a selectivity for n is 1 of at least 65%.