Arrange the following in increasing order of +I effect : 1∘Alkyl Group, 2∘Alkyl Group, 3∘Alkyl Groupand Methyl Group
A
1∘Alkyl Group <2∘Alkyl Group <3∘Alkyl Group <Methyl Group
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B
Methyl Group<1∘Alkyl Group <2∘Alkyl Group <3∘Alkyl Group
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C
1∘Alkyl Group <3∘Alkyl Group <2∘Alkyl Group <Methyl Group
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D
Methyl Group<3∘Alkyl Group <1∘Alkyl Group <1∘Alkyl Group
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Solution
The correct option is BMethyl Group<1∘Alkyl Group <2∘Alkyl Group <3∘Alkyl Group Alkyl groups are electron donating groups
More the number of alkyl groups attached, higher the strength of +I effect.
In other words, as the degree of ‘C’ increases, the strength of +I effect increases.
So, the order of electron donating tendency or +I effect order will be Methyl Group<1∘Alkyl Group <2∘Alkyl Group <3∘Alkyl Group