16) Which one of the following is NOT an example of inductive effects on chemica

Question

16) Which one of the following is NOT an example of inductive effects on chemical structure or reactivity?

A) Brønsted acid strength:                            HCl > HF

B) Carbocation stability:                                (CH3)3C > CH3

C) Free radical stability:                                 (CH3)2CH• > CH3CH2•

D) Heat of Hydrogenation for alkenes:         1-Butene > trans-2-Butene

A) Brønsted acid strength:                            HCl > HF

B) Carbocation stability:                                (CH3)3C > CH3

C) Free radical stability:                                 (CH3)2CH• > CH3CH2•

D) Heat of Hydrogenation for alkenes:         1-Butene > trans-2-Butene

Explanation / Answer

Inductive effect : The movement of electron density through sigma bond as a result of electronegativity difference is know as inductive effect.

Except last example we have all single bonds and there we can get +I or -I effect.

But when we look at last example we see that heat of hydrogenation.

This depends on the more substituted alkenes. Trans 2 butene is more substituted than 1 -butene so trans-2-butene got loess heat of hydrogenation due to more stability of it.

And so this is different than others.

Answer : D ) Heat of hydrogenation for alkenes : 1 -butene > trans -2-butene

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