Perfluoroalkanes and haloperfluoroalkanes, their precursors and process for their synthesis
申请人:AUSIMONT S.p.A.
公开号:EP0200908A1
公开(公告)日:1986-12-17
1. Perfluoroalkanes and haloperfluoroalkanes of general formula:
wherein:
i a and c, equal to or different from each other, are integers ranging from 0 to 4 and preferably from 0 to 2, and their sum is not lower than 1 and not greater than 6, preferably not greater than 3;
b is an integer ranging from 1 to 5, preferably from 1 to 3;
the sum a + b + c is not greater than 8, and preferably not greater than 5;
X and Y, equal to or different from each other, can be iodine, bromine, chlorine or fluorin;
with the limitations:
that X and Y can be contemporaneously fluorine only in case in which at least one of the two indexes a and c is equal to or greater than 2;
that X is not fluorine when a = 1 and c = 0;
that Y is not fluorine when c = 1 and a = 0;
that Y cannot be I when X = F and c = 0;
that X cannot be I when Y = F and a = 0;
the -C2F4-units can be present in the molecular structure also alternated to the -CF2-CF(CF3)-units; are prepared by telomerizing with C3F6 or with a mixture of C3F6 + C2F4 a precursor constituted by one or more -CF2CF2-units, and having at one end a iodine atom, and at the other end a halogen atom selected from iodine, chlorine, bromine, fluorine, and in the possible subsequent halogenating reaction with fluorine, chlorine, bromine for the substitution of iodine atoms.
1.通式如下的全氟烷烃和卤代全氟烷烃
其中
i a 和 c 相等或互不相同,是 0 至 4 的整数,最好是 0 至 2,它们的和不小于 1 也不大于 6,最好是不大于 3;
b 是 1 至 5 的整数,最好是 1 至 3;
a + b + c 的和不大于 8,最好不大于 5;
X 和 Y 相等或不同,可以是碘、溴、氯或氟;
但有以下限制
只有当两个指数 a 和 c 中至少有一个等于或大于 2 时,X 和 Y 才同时是氟;
当 a = 1 和 c = 0 时,X 不是氟;
当 c = 1 和 a = 0 时,Y 不是氟;
当 X = F 和 c = 0 时,Y 不可能是 I;
当 Y = F 和 a = 0 时,X 不可能是 I;
分子结构中的-C2F4-单元也可以与-CF2-CF(CF3)-单元交替出现;用 C3F6 或 C3F6 + C2F4 的混合物对由一个或多个-CF2CF2-单元构成的前体进行端聚,该前体一端具有碘原子,另一端具有选自碘、氯、溴、氟的卤素原子,并在随后可能与氟、氯、溴进行卤化反应以取代碘原子。