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Physical Properties of Alkenes

Cis-2-butene ...

Question

$C i s - 2 -$ butene $C H_{2} I_{2} / Z n (C u) - -------- \to D i e t h y l e t h e r$

Which of the following is the correct product obtained from the above reaction:
1) Cyclobutane
2) Cyclopropane
3) 2-Iodo cyclopropane

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Solution

When cis-2-butene reacts with diiodomethane in presence of Zn(Cu) in diethyl ether, carbene is added to the carbon carbon double bond to form cyclopropane ring.

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Similar questions

T r a n s - 2 -

K O C {(C H_{3})}_{3} - ------- \to C H C l_{3}

Which of the following is the correct product obtained in the above reaction:

1) 1,1-dichloro cyclopropane

2) 2,2-dichloro butane

3) 2,2-dimethyl cyclopropane

There are some alkenes are given as follow:

2-methyl propene, cis-2-butene, trans-2-butene

Which of the following is the correct order for increasing order of reactivity for acid catalyzed hydration?

1) trans-2-butene< cis-2-butene < 2-methyl propene

2) cis-2-butene< trans-2-butene < 2-methyl propene

3) 2-methyl propene < trans-2-butene < cis-2-butene

Q. When 3, 3-dimethyl-2-butanol is heated with

H_{2} S O_{4}

the major product obtained is

Q. Choose the correct statement among the following for the product formed, when cis-2-butene is reacted with bromine in

C C l_{4}

.

Q. Diazomethane was photolysed to generate singlet carbine which was treated with cis-2-butene. The main product(s) of the reaction is/are:

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