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JEE Advanced 2008Paper 2

Exam: JEE Advanced
Year: 2008
Paper: Paper 2
Subject: Chemistry
Chapter: General Organic Chemistry

JEE Advanced 2008 · Paper 2 · Chemistry · General Organic Chemistry

The correct stability order for the following species is

The correct stability order for the following species is

The correct stability order for the following species is

Options

A(II) $>$ (IV) $>$ (I) $>$ (III)
B(I) $>$ (II) $>$ (III) $>$ (IV)
C(II) $>$ (I) $>$ (IV) $>$ (III)
D(I) $>$ (III) $>$ (II) $>$ (IV)

Correct answer

D. (I) $>$ (III) $>$ (II) $>$ (IV)

Step-by-step solution

I

>

III

>

II

>

IV

+M

-effect, hyperconjugation

(6 \mathrm{Hs})

and

+

I-effect (2 Me groups)

+M

-effect, hyperconjugation (

3 \mathrm{Hs} )

and +I

-effect (1 Me group)

\overbrace{2^{\circ}

\text{ carbocation) }

}^{+}

Hyperconjugation (5Hs) and +I-effect Hyperconjugation (2Hs)

and +I

effect

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