Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropene [CICHCH

Question

Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropene [CICHCHCH_3) II. 2-chloropropene |CH_2CCICH_3] III 3-chloropropcne [CH_2CHCH_2CI) A) II and III B) only I C) I and III D) I and II What is the slow, rale-determining step, in the acid-catalyzed dehydration of 2-mcthyl-2-propanol? (CH_3)_3COH H_2SO_4 rightarrow A) Loss of water from the oxonium ion to form a carbocation. B) Loss of a beta-hydrogen from the carbocation to form an alkene. C) The simultaneous loss of a beta-hydrogen and water from the oxonium ion. D) Protonation of the alcohol to form an oxonium ion. Based on Zaitsev's rule, which of the following is the major product of the reaction below?

Explanation / Answer

(32) (A) Only I exhibits E - Z iosmerism.Becaus ethe doubly bonded carbons have diffrent substituents.

(33) (B) Loss of water molecule from oxonium ion is slow and rate determining step.

(34) (C) According to Zaitsev's rule more stable alkene is obtained as major product.

(35) (B) More substituted alkene is more stable. If more is the stability less is the heat of combustion.

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