Match the following

	List – I		List – II
a		i	Fittig Reaction
b		ii	Sandmeyer’s Reaction
c	2C6H5Cl + 2Na $\stackrel{\mathrm{Ether}}{\to }$C6H5 - C6H5 + 2NaCl	iii	Wurtz Reaction
d	2C2H5Cl + 2Na $\stackrel{\mathrm{Ether}}{\to }$C2H5 - C2H5 + 2NaCl	iv	Gattermann Reaction

Sandmeyer reaction →
It is used to synthesize aryl halides from aryl diazonium salts. It is an example of a radical-nucleophilic aromatic substitution.
When a primary aromatic amine, dissolved or suspended in cold aqueous mineral acid, is treated with sodium nitrite, a diazonium salt is formed. Mixing the solution of freshly prepared diazonium salt with cuprous chloride or cuprous bromide results in the replacement of the diazonium group by −Cl or −Br.

Fittig Reaction

When the aryl halide is reacted with sodium metal, an intermediate organo-alkali compound is formed, which is followed by a nucleophilic attack of the alkyl halide as shown below. Thus, the required alkyl-aryl is formed.

Wurtz Reaction

Wurtz’s reaction is an organic chemical coupling reaction wherein sodium metal is reacted with two alkyl halides in the environment provided by a solution of dry ether in order to form a higher alkane along with a compound containing sodium and the halogen.

Gattermann reaction

Gattermann reaction is used for obtaining chlorobenzene or bromobenzene from benzenediazonium chloride by treating it with Cu/HCl or Cu/HBr respectively.