QUESTION 1 Which one of the following is NOT an example of inductive effects on

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QUESTION 1 Which one of the following is NOT an example of inductive effects on chemical structure or reactivity? A) Brønsted acid strength: B) Carbocation stability: C) Free radical stability: D) Heat of Hydrogenation for alkenes: (CH3)2CH.> CH3CH2 cis-2-Butene> trans-2-Butene QUESTION 2 How many reactive intermediates are involved in a 3-step reaction mechanism? B) 1 C) 2 D) 3 QUESTION 3 What is the rate equation for a SN1 reaction between a nucleophile (Nu) and an alkyl halide electrophile (RX)? A) rate -k [Nu] B) rate-k[RX] C) rate - k [Nu] [RX D) rate - k [R QUESTION 4 What is the transition state structure for a SN2 reaction between l anion and CH3 Br to form CH31 and Br anion? A) HCB B)I-C-Br H3 C)-C-Br Ha QUESTION S Given the unique common name of Phenol for benzene-based alcohol molecule C&Hs-OH;, what is the name of the compound shown in the box? A) ipso-Chlorophenol C) ortho- Chlorophenol B) meta- Chlorophenol D) para- Chlorophenol Cl

Explanation / Answer

Question 1:

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 cis 2-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 : cis 2 -butene > trans -2-butene

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