Which of the following compounds will not exhibit positional isomerism?

2-butene

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2-butyne

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2-butanol

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Butanal

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Solution

The correct options are D. Butanal
Position Isomerism:
The positions of the functional groups or substituent atoms are different in position isomers. Typically, this isomerism involves the attachment of the functional groups to different carbon atoms in the carbon chain.
$C H_{3} C H = C H C H_{3} (2 - b u t e n e) o r C H_{3} C H_{2} C H = C H_{2} (1 - b u t e n e)$
$C H_{3} C H_{2} C H (O H) C H_{3} (2 - b u t a n o l) o r C H_{3} C H_{2} C H_{2} C H_{2} - O H (1 - b u t a n o l)$
$C H_{3} - C \equiv C - C H_{3} (2 - b u t y n e) o r C H_{3} C H_{2} C \equiv C H (1 - b u t y n e)$
$C H_{3} C H_{2} C H_{2} C H O (b u t a n a l)$
Only butanal will not show position isomerism.

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Similar questions

Which of the following compounds exhibit positional isomerism?

(1)

1 - b u t e n e

(2)

b u t a n e

(3)

1 - b u t y n e

(4)

N H_{3}

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