The compound CH 3 CH - CHCH 3 and CH 3 CH 2 CH - CH 2 areA- TautomersB- Position isomersC- Exist together in dynamic equilibriumD- Optical isomers

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Primary, Secondary, Tertiary and Quaternary Carbon

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Question

The compound $C H_{3} C H = C H C H_{3}$ and $C H_{3} C H_{2} C H = C H_{2}$ are

Tautomers

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Position isomers

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Exist together in dynamic equilibrium

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Optical isomers

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Solution

The correct option is B Position isomers
Positional isomers are constitutional isomers that have the same carbon skeleton and the same functional groups but differ from each other in the location of the functional groups on or in the carbonchain.

The two isomers differ in the position of the double bond. So they are positional isomers.

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Compounds A and C in the following reaction are

$C H_{3} C H O (i) C H_{3} M g B r - ------- \to (i i) H_{2} O (A) H_{2} S O_{4}, Δ - ----- \to (B) (i) H y d r o b o r a t i o n - ---------- \to (i i) O x i d a t i o n (C)$

CH³ - CH² - CH = CH² and CH³ - CH = CH³ are known as

Q. Consider the following compounds.
(i)

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pent-1-yne
(ii)

C H_{3} - C H (C H_{3}) - C \equiv C H

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(iii)

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The compounds (i) and (ii) are position isomers and the compounds (i) and (iii) are chain isomers.

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The compound CH3CH=CHCH3 and CH3CH2CH=CH2 are

The compound $C H_{3} C H = C H C H_{3}$ and $C H_{3} C H_{2} C H = C H_{2}$ are