Which of the following structures is not correctly matched?

α

- Methoxypropionaldehyde -

H_{3} C - H_{3} C O | C H - O | | C - H

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3-Hydroxybutanal -

C H_{3} - O H | C H - C H_{2} C H O

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4 - Oxopentanal -

C H_{3} C H_{2} C H_{2} - O | | C - C H O

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Di-sec. -butylketone -

C H_{3} C H_{2} - C H_{3} | C H - O | | C - C H_{3} | C H - C H_{2} C H_{3}

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Solution

The correct option is C 4 - Oxopentanal - $C H_{3} C H_{2} C H_{2} - O | | C - C H O$
According to IUPAC counting no. should be given from functional group. Also aldehyde has grater ranking than ketone.

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C H_{3} - C H = C H - C H_{2} - O | | C - C H_{3} \to C H_{3} - C H = C H - C H_{2} - O | | C - O H

C H_{3} - O | | C - C H | C H_{3} - C H | C H O - C H | C H_{3} - C H_{3}

I . ⊖ C H_{2} - \oplus C H - C H = C H - O - C H_{3}

I I . ⊖ C H_{2} - C H = C H - \oplus C H - O - C H_{3}

I I I . C H_{2} = C H - ⊖ C H - \oplus C H - O - C H_{3}

I V . C H_{2} = C H - ⊖ C H - C H = \oplus O - C H_{3}

C H_{2} = C H - C H = C H - O - C H_{3}

C H_{3} - O H | C H - C H_{2} - C H_{2} - O | | C - C H_{3} \to C H_{3} - O H | C H - (C H_{2})_{3} - C H_{3}

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