Fluorine-containing diene compound, fluorine-containing polymer, and methods for producing same

A method for producing a fluorine-containing diene compound represented by the following formula I, the method comprising reacting a compound represented by the following formula a with a compound represented by the following formula b in the presence of a base:

• wherein in the formulae, each of R1 to R7 is independently a hydrogen atom, a chlorine atom, a fluorine atom, or an alkyl group having a carbon number of 1 to 5 which may be substituted by a fluorine atom, k is 0 or 1, and at least one of R1 to R7 is a hydrogen atom.

A fluorine-containing polymer obtained by polymerizing a fluorine-containing compound represented by the following formula I′ as a raw material monomer:

• wherein in the formula, each of R11 to R13, R16, and R17 is independently a hydrogen atom, a chlorine atom, a fluorine atom, or a monovalent organic group which may have a heteroatom, each of R14 and E15 is independently a hydrogen atom, a chlorine atom, or a monovalent organic group which may have a heteroatom, k is 0 or 1, at least one of R11 to R17 is a hydrogen atom, R11 or R12 may combine with any one of R13 to R17 to form a ring, and R13 may combine with any one of R11, R12 and R14 to R17 to form a ring.

A method for producing a fluorine-containing polymer, the method comprising polymerizing a raw material monomer containing a fluorine-containing compound represented by the following formula I′:

• wherein in the formula, each of R11 to R13, R16, and R17 is independently a hydrogen atom, a chlorine atom, a fluorine atom, or a monovalent organic group which may have a heteroatom, each of R14 and R12 is independently a hydrogen atom, a chloride atom, or a monovalent organic group which may have a heteroatom, k is 0 or 1, at least one of R11 to R17 is a hydrogen atom, R11 or R12 may combine with any one of R13 to R17 to form a ring, and R13 may combine with any one of R11, R12 and R14 to R17 to form a ring.