Hyperconjugation describes the orbital i...

Hyperconjugation describes the orbital interactions between the p-systems and the adjacent s-bond of the substituent group(s) in organic compounds. Hyperconjugation is also called as Baker and Nathen effect. The necessary and sufficient condition for the hyperconjugation are :
i) Compound should have at least on sp2 hybrid carbon of either alkene, carbocation or alkyl free radical.
ii) A-carbon with respect to sp2 hybrid carbon should have at least one hydrogen. Hyperconjugation are of three types: (i) s(C-H), p-conjugation.
(iii) s(C-H), positive charge conjugation
iv) s(C-H), odd electron conjugation
The hyperconjugation may be represented as

Number of resonating structures due to hyperconjugation = (n + 1) where n is the number of a-hydrogen.
Greater is the number of such forms, more is the stability of the species under considersation.
Hyperconjugation is possible in which of the following species ?

`CH_(3)-bar(C)H-CH_(3)`

`C_(6)H_(5)-CH_(3)`

`H_(2)C=CH_(2)`

`H_(3)C-underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(C)-CH=CH_(2)`

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The correct Answer is:

No other structure has the required condition.

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Hyperconjugation describes the orbital interactions between the p-systems and the adjacent s-bond of the substituent group(s) in organic compounds. Hyperconjugation is also called as Baker and Nathen effect. The necessary and sufficient condition for the hyperconjugation are : i) Compound should have at least on sp2 hybrid carbon of either alkene, carbocation or alkyl free radical. ii) A-carbon with respect to sp2 hybrid carbon should have at least one hydrogen. Hyperconjugation are of three types: (i) s(C-H), p-conjugation. (iii) s(C-H), positive charge conjugation iv) s(C-H), odd electron conjugation The hyperconjugation may be represented as Number of resonating structures due to hyperconjugation = (n + 1) where n is the number of a-hydrogen. Greater is the number of such forms, more is the stability of the species under considersation. Which of the following carbocations will show highest number of Hyperconjugation forms?

Hyperconjugation describes the orbital interactions between the p-systems and the adjacent s-bond of the substituent group(s) in organic compounds. Hyperconjugation is also called as Baker and Nathen effect. The necessary and sufficient condition for the hyperconjugation are : i) Compound should have at least on sp2 hybrid carbon of either alkene, carbocation or alkyl free radical. ii) A-carbon with respect to sp2 hybrid carbon should have at least one hydrogen. Hyperconjugation are of three types: (i) s(C-H), p-conjugation. (iii) s(C-H), positive charge conjugation iv) s(C-H), odd electron conjugation The hyperconjugation may be represented as Number of resonating structures due to hyperconjugation = (n + 1) where n is the number of a-hydrogen. Greater is the number of such forms, more is the stability of the species under considersation. Stability of saturated alkyl carbocations can be explained by

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Hyperconjugation describes the orbital interactions between the p-systems and the adjacent s-bond of the substituent group(s) in organic compounds. Hyperconjugation is also called as Baker and Nathen effect. The necessary and sufficient condition for the hyperconjugation are : i) Compound should have at least on sp2 hybrid carbon of either alkene, carbocation or alkyl free radical. ii) A-carbon with respect to sp2 hybrid carbon should have at least one hydrogen. Hyperconjugation are of three types: (i) s(C-H), p-conjugation. (iii) s(C-H), positive charge conjugation iv) s(C-H), odd electron conjugation The hyperconjugation may be represented as Number of resonating structures due to hyperconjugation = (n + 1) where n is the number of a-hydrogen. Greater is the number of such forms, more is the stability of the species under considersation. Which of the following carbocations will show highest number of Hyperconjugation forms?

`CH_(3)-overset(+)(C)H_(2)`

`H_(3)C-underset(underset(CH_(3))(|))(overset(+)(C)H)`

`H_(3)C-underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(C^(+))`

`H_(3)C-underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(CH_(2)-C^(+)`

Hyperconjugation describes the orbital interactions between the p-systems and the adjacent s-bond of the substituent group(s) in organic compounds. Hyperconjugation is also called as Baker and Nathen effect. The necessary and sufficient condition for the hyperconjugation are : i) Compound should have at least on sp2 hybrid carbon of either alkene, carbocation or alkyl free radical. ii) A-carbon with respect to sp2 hybrid carbon should have at least one hydrogen. Hyperconjugation are of three types: (i) s(C-H), p-conjugation. (iii) s(C-H), positive charge conjugation iv) s(C-H), odd electron conjugation The hyperconjugation may be represented as Number of resonating structures due to hyperconjugation = (n + 1) where n is the number of a-hydrogen. Greater is the number of such forms, more is the stability of the species under considersation. Stability of saturated alkyl carbocations can be explained by

inductive effect

hyperconjugation

both inductive effect and hyperconjugation

electromeric effect

Hyperconjugation is best described as:

Delocalisation of `pi` electrons into a nearby empty orbital.

Delocalisation of `sigma` electrons into a nearby empty orbital.

The effect of alkyl groups donating a small amount of electron density inductively into a carbocation.

The migration of a carbon or hydrogen from one carbocation to another.

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Hyperconjugation is best described as:

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