Given below are two statements: Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is CH_3^- > CH_3-CH_2^- > (CH_3)_2CH^- > (CH_3)_3C^-. Statement II: Allyl and benzyl carbanions are more stabilised by inductive effect and not by resonance effect. In the light of the above statements, choose the correct answer from the options given below
C. Statement I is correct but Statement II is incorrect
Statement I is correct because alkyl groups exert a +I effect (electron-donating inductive effect). This increases the electron density on the negatively charged carbon atom, destabilizing the carbanion. Thus, as the number of alkyl groups increases, the stability of the carbanion decreases. The order of stability is CH _3^- > CH _3 CH _2^- > ( CH _3)_2 CH ^- > ( CH _3)_3 C ^-. Statement II is incorrect because allyl and benzyl carbanions are highly stabilized by the resonance effect, where the negative charge is delocalized over the adjacent bonds or the benzene ring, rather than by the inductive effect. Answer: Statement I is correct but Statement II is incorrect
Related: Chemistry — General Organic Chemistry · All PYQ Banks