Halogenated compound, polymer comprising same, and polymer electrolyte membrane comprising same

A halogenated compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• R1 to R3 are the same as or different from each other, and each independently represented by a halogen group;
• the following Chemical Formula 2;
• or the following Chemical Formula 3;
• at least one of R1 to R3 is a halogen group;
• at least one of R1 to R3 is the following Chemical Formula 2;
• in Chemical Formulae 2 and 3,
• A is SO3H, SO3−M+, —COOH, —COO−M+, —PO3H2, —PO3H−M+, —PO32−2M+, —O(CF2)mSO3H, —O(CF2)mSO3−M+, —O(CF2)mCOOH, —O(CF2)mCOO−M+, —O(CF2)mPO3H2, —O(CF2)mPO3H− M+ or —O(CF2)mPO32−2M+;
• m is an integer of 1 to 6;
• M is a group 1 element;
• R4 and R5 are the same as or different from each other, and each independently a halogen group;
• n is an integer of 2 to 10, and structures in the 2 to 10 parentheses are the same as or different from each other;
• L is O, S, SO2, CO or CF2;
• and
• R6 is a hydroxyl group;
• or a halogen group.