A simple iron catalyst enables the coupling with numerous primary, secondary and tertiary alkyl halides. Broad scope and high functional group tolerance are demonstrated.

A primary alkyl halide would prefer to undergo S N 2 reaction. (a) S N 2reactions occur only if the intermediate carbonation is stable i.e., 3° carbocation. (b) ...

Answer: (i) It undergoes S N 2 reaction faster as it is a primary halide. (ii) Due to its large size, ... Alkyl halides are polar molecules that are held together by dipole-dipole interaction.