Question: When an ether is treated with cold concentrated HI, cleavage occurs as follows: When mixed ethers are used, the alcohol and alkyl iodide that form

When an ether is treated with cold concentrated HI, cleavage occurs as follows:

When mixed ethers are used, the alcohol and alkyl iodide that form depend on the nature of the alkyl groups. Use mechanisms to explain the following observations:
(a)

(b)

R-O-R + HI- ROH + RI OMe OH / + Mel HI HI + MeOH OMe

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