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Positive(+ve) and negative(-ve) inductive groups

Positive(+ve) and negative(-ve) Inductive groups :



-I showing group :
NR3+ , SR2+ , NH3+ , NO2- , SO3H , CN-, -CHO, -COCH3, -COOH , -F , -Cl , -Br, -I ,-OR , -OH, Alkyne group , -NH2 ,-CH=CH2 , -H

 +I showing group :
CH2- , NH- , O- , COO- , -C(CH3)3 , -CH(CH3)2 , -CH2CH3 , -CH3
In decreasing order….
You can't called electron withdrawing group as -I effect showing group in all the cases.
For example , in case of OH- , it oh group attached with carbon chain it is act as electron withdrawing group but if it is attached with benzene ring it is act as electron donating group.
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