(B) In singlet methylene $(:CH_2)$,the carbon atom is $sp^2$ hybridized.Two $sp^2$ orbitals are used to form bonds with hydrogen atoms,while the third

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(B) In singlet methylene $(:CH_2)$,the carbon atom is $sp^2$ hybridized.Two $sp^2$ orbitals are used to form bonds with hydrogen atoms,while the third $sp^2$ orbital contains a lone pair of electrons with opposite spins.Since all electrons are paired,singlet methylene is diamagnetic in nature.

Class 11 Chemistry 8-4.Organic Chemistry : Reaction mechanism Reactive Intermediates

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Singlet methylene is....

A
Lewis base
B
Diamagnetic
C
Nucleophile
D
Paramagnetic

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Class 11

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8-4.Organic Chemistry : Reaction mechanism

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Reactive Intermediates

With a change in hybridisation of the carbon bearing the charge,the stability of a carbanion increases in the order:

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In the following species,the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is

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Number of carbocations from the following that are not stabilized by hyperconjugation is $...........$ .

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Identify the most stable carbocation from the following:

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Arrange the following carbocations in the decreasing order of their stability:
$a$. $CH_3-CH^{+}-CH_3$
$b$. $CH_3-CH^{+}-OCH_3$
$c$. $CH_3-CH^{+}-COCH_3$

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Singlet methylene is....

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With a change in hybridisation of the carbon bearing the charge,the stability of a carbanion increases in the order:

In the following species,the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is

Number of carbocations from the following that are not stabilized by hyperconjugation is $...........$ .

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Arrange the following carbocations in the decreasing order of their stability:$a$. $CH_3-CH^{+}-CH_3$$b$. $CH_3-CH^{+}-OCH_3$$c$. $CH_3-CH^{+}-COCH_3$

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Arrange the following carbocations in the decreasing order of their stability:
$a$. $CH_3-CH^{+}-CH_3$
$b$. $CH_3-CH^{+}-OCH_3$
$c$. $CH_3-CH^{+}-COCH_3$