Question

H is better reagent than HBr for cleavage of ether.

Answer 1

the cleavage of ethers The cleavage of ether occurs via SN2 mechanism in which Acirc; nbsp;nucleophile Acirc; nbsp;attack on the carbon to substitute.
    HI is a very strong acid compare to all halogen on the other hand I` is very good leaving group.

Answer 2

HI is a better reagent thn HBr bcoz the cleavage of ehers involves the nucleophilic attack of the halid ion on the protonated ether molc Obviously greater the nucleophilicity of the halid ion more reactive is the halogen acid .since the nucleophilicity of the halid ion is -

I >. Br. > Cl

Thr4 the order of reactivity of halogen acid is -

HI >. HBr > HCl