You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Hyperconjugation

Correct order...

Question

Correct order of stability among the following compounds is:

1-butene > trans-2-butene > cis-2-butene

No worries! We‘ve got your back. Try BYJU‘S free classes today!

trans-2-butene > 1-butene > cis-2-butene

No worries! We‘ve got your back. Try BYJU‘S free classes today!

trans-2-butene > cis-2-butene > 1-butene

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

cis-2-butene > trans-2-butene > 1-butene

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C trans-2-butene > cis-2-butene > 1-butene
In the comparison of stability among alkenes like 1 - butene, trans-2 butene and cis - 2 - butene, stability can be determined by the phenomenon of hyperconjugation. More the number of alpha hydrogen, More will be stability.
${C H}_{2} = C H - {C H}_{2} - {C H}_{3} h a s 2$ alpha hydrogen
${C H}_{3} - C H = C H - {C H}_{3} h a s 6$ alpha hydrogen
Between is and trans 2 -butene. Trans will be more stable as in cis structure there is steric bulk present.
So, Order of Stability will be
trans -2 - butene $>$ cis-2-butene $> 1$ -butene

Suggest Corrections

Similar questions

Q. What is the order of stability for
I. 1-butene; II cis-2-butene; III. trans-2-butene?

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. (i) Cis - 2 - butene

\to

trans-2-butene,

△ H_{1}

(ii) Cis - 2 - butene

\to

1 - butene,

△ H_{2}

(iii) Trans-2-butene is more stable than cis - 2 - butene.
(iv) Enthalpy of combustion of 1 - butene,

△ H = - 649.8 k c a l / m o l

(v)

9 △ H_{1} + 5 △ H_{2} = 0

(vi) Enthalpy of combustion of trans 2 - butene,

△ H = - 647.0 k c a l / m o l .

The value of

△ H_{1}

and

△ H_{2}

in kcal/mol are

Q. (i) Cis-2-butene

\to

trans-2-butene,

Δ H_{1}

(ii) Cis-2-butene

\to

1-butene,

Δ H_{2}

(iii) Trans-2-butene is more stable than cis-2-butene.
(iv) Enthalpy of combustion of 1- butene,

Δ H = - 647.0 k C a l / m o l .

The value of

Δ H_{1}

Δ H_{2}

respectively in K Cal/mole are

Q. (i) Cis - 2 - butene

\to

trans-2-butene,

△ H_{1}

(ii) Cis - 2 - butene

\to

1 - butene,

△ H_{2}

(iii) Trans-2-butene is more stable than cis - 2 - butene.
(iv) Enthalpy of combustion of 1 - butene,

△ H = - 649.8 k c a l / m o l

(v)

9 △ H_{1} + 5 △ H_{2} = 0

(vi) Enthalpy of combustion of trans 2 - butene,

△ H = - 647.0 k c a l / m o l .

The value of

△ H_{1}

and

△ H_{2}

in kcal/mol are

Join BYJU'S Learning Program