Ionic species are stabilised by the dispersal of charge. Which of the following carboxylate ion is the most stable?

Answers (1)

The answer is the option 

Explanation: The dispersal of the negative charge depends on the stabilisation of the carboxylate ion. The negative charge which is shown is dispersed by two factors i.e +R effect of carboxylate ion and -I effect of halogens. In the above cases, +R effect is common, but halogen atoms are different and hence dispersal of the negative charge depends upon halogen atoms, where F is most electronegative.

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