1.

The correct order of reactivity for the addition reaction of the following carbonyl compounds with ethyl magnesium iodide is

Answer»

`I gt III gt II gt IV`
`IV gt III gt II gt I`
`I gt II gt IV gt III`
`III gt II gt I gt IV`

Solution :If the CARBONYL carbon is sterically crowded then it will be reluctant to undergo addition reaction. Moreover, attachment of bulkier alkyl groups with the carbonyl carbon LESSENS its positive charge resulting into the minimisation of attack by `overset(ddot)(BARR)` from RMgBr. So, the ORDER is :


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