Consider the following reaction:
$BrCH_2CH_2F + SbF_5 \xrightarrow{SO_2, -60^{\circ}C} CH_2-CH_2-Br^+ + SbF_6^-$
In this reaction,$SbF_5$ acts as:

  • A
    an acid
  • B
    a base
  • C
    a nucleophile
  • D
    an electrophile

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