To provide a method for obtaining 1,1-dichloro-3,3,3-trifluoropropane by reacting 1,1-difluoroethylene with dichlorofluoromethane, which suppresses the production of chloroform as a by-product and achieves a product having a high R-243fa concentration.

This method is characterized by obtaining 1,1-dichloro-3,3,3-trifluoropropane by reacting 1,1-difluoroethylene with dichlorofluoromethane in the presence of trifluoromethane.

A method for producing at least one compound selected from the group consisting of a compound represented by the following formula (10), a compound represented by the following formula (11), a compound represented by the following formula (12), and a compound represented by the following formula (13), which the method containing reacting a compound represented by the following formula (2) with a compound represented by the following formula (7), in the presence of at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (3), a compound represented by the following formula (4), a compound represented by the following formula (8), and a compound represented by the following formula (9). ##STR00001##

A method for producing at least one compound selected from the group consisting of a compound represented by the following formula (10), a compound represented by the following formula (11), a compound represented by the following formula (12), and a compound represented by the following formula (13), which the method containing reacting a compound represented by the following formula (2) with a compound represented by the following formula (7), in the presence of at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (3), a compound represented by the following formula (4), a compound represented by the following formula (8), and a compound represented by the following formula (9). ##STR00001##

The invention relates to a process for the manufacture of a-iodoperfluoroalkanes and ,-diiodoperfluoroalkanes of general formula: (1) A(C.sub.2F.sub.4).sub.n1, wherein: A is selected from F, CF.sub.3 and I and n is an integer equal to or higher than 1, with the proviso that, when A is F, n is an integer higher than 1 said process comprising heating a mixture [mixture (M1)] containing: a compound selected from I.sub.2, CF.sub.3I, CF.sub.3CF.sub.2I and C.sub.2F.sub.4I.sub.2; TFE; and CO.sub.2 at definite temperatures and concentrations of CO.sub.2.

The invention relates to a process for the manufacture of a-iodoperfluoroalkanes and ,-diiodoperfluoroalkanes of general formula: (1) A(C.sub.2F.sub.4).sub.n1, wherein: A is selected from F, CF.sub.3 and I and n is an integer equal to or higher than 1, with the proviso that, when A is F, n is an integer higher than 1 said process comprising heating a mixture [mixture (M1)] containing: a compound selected from I.sub.2, CF.sub.3I, CF.sub.3CF.sub.2I and C.sub.2F.sub.4I.sub.2; TFE; and CO.sub.2 at definite temperatures and concentrations of CO.sub.2.