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8.1. Organic chemistry Nomenclature of organic compounds — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry8.1. Organic chemistry Nomenclature of organic compounds1 Mark
MCQ
The correct $IUPAC$ name of compound :

$\begin{array}{*{20}{c}}
  {C{H_3} - C{H_2} - C - CH - CHO} \\ 
  {\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,CN} 
\end{array}$

is :

  • A
    $2-$ cyano $-3-$ oxopentanal
  • ✓
    $2-$ formyl $-3-$ oxopentanenitrile
  • C
    $2-$ cyano $-1,3-$ pentanedione
  • D
    $1,3-$ dioxo $-2-$ cyanopentane
✓

Answer

Correct option: B.
$2-$ formyl $-3-$ oxopentanenitrile
b
The correct IUPAC name of the compound is $2$-formyl-$3$-oxopentanenitrile.

The parent compound is an alkyl cyanide containing $5$ carbon atoms.

It is known as pentonitrile.

An aldehyde group is present on the second carbon atom and a carbonyl group is present on third carbon atom.

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