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Question
The increasing order of stability of the following species is?
(I) Cl−⊕CH2
(II) F−⊕CH2
(III) Cl−CH2−⊕CH2
(IV) F−CH2−⊕CH2
The increasing order of stability of the following species is?
(I) Cl−⊕CH2
(II) F−⊕CH2
(III) Cl−CH2−⊕CH2
(IV) F−CH2−⊕CH2
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Solution
The correct option is A III>IV>I>II
Cl and F are electrons withdrawing and −CH2− is electron releasing group.Stability increases if positive charge on −CH2− decreases. By considering above conditions Cl−CH2−+CH2 is more stable than other. Because of less electronegative 'Cl' and electron releasing −CH2− group. Likewise F−CH2−+CH2 is more stable next. Cl−+CH2 is more stable than F−+CH2, because of less electronegativity of Cl.So stability order is III>IV>I>II
Cl and F are electrons withdrawing and −CH2− is electron releasing group.
Stability increases if positive charge on −CH2− decreases. By considering above conditions Cl−CH2−+CH2 is more stable than other. Because of less electronegative 'Cl' and electron releasing −CH2− group. Likewise F−CH2−+CH2 is more stable next. Cl−+CH2 is more stable than F−+CH2, because of less electronegativity of Cl.
So stability order is III>IV>I>II
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