MCQ
Which nomenclature is not according to $IUPAC$ system ?
  • $Br-CH_2 -CH = CH_2$  $(1-$ Bromoprop $- 2 -$ ene$)$
  • B
    $\begin{array}{*{20}{c}}
      {C{H_3}\,} \\ 
      {|\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C{H_2} - C - C{H_2} - CHC{H_3}} \\ 
      {\,|\,\,\,\,\,\,\,\,\,\,\,|} \\ 
      {\,\,\,\,\,\,\,Br\,\,\,\,\,\,C{H_3}} 
    \end{array}\,$  $(4-$ Bromo $-2,4-$ dimethylhexane$)$
  • C

  • D
    $\begin{array}{*{20}{c}}
      {C{H_3} - C - C{H_2} - C{H_2} - C{H_2}COOH} \\ 
      {\,\,\,\,\,\,|{\mkern 1mu} |{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} } \\ 
      {\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} } 
    \end{array}$   $(5-$ Oxohexanoic acid $)$

Answer

Correct option: A.
$Br-CH_2 -CH = CH_2$  $(1-$ Bromoprop $- 2 -$ ene$)$
a
In $IUPAC$ system of nomenclature, preference is given to multiple bond than halogen substituent, so the correct name of Double bond more priore than halogen

$\mathop {Br - {{\mathop {CH}\limits^3 }_2} - \mathop {CH}\limits^2  = {{\mathop {CH}\limits^1 }_2}}\limits_{3\, - \,bromoprop\, - \,1\, - \,ene} $   is

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