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Electron deficient species are known as ...

Electron deficient species are known as electrophiles. All positviely changed species are not electronphilic. Covalent compound having complete octer but if central atom has unfilled d-orbital also act as electrophiles. All electrophiles are not always Lewis acid.
Which of the following is not electrophile

A

`H^(o+)`

B

`overset(o+)CH_(3)`

C

`BX_(3)`

D

`overset(o+)NH_(4)`

Text Solution

Verified by Experts

The correct Answer is:
D
`overset(o+)NH_(4)` has complete octet.
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Electron deficient species are known as electrophiles. All positviely changed species are not electronphilic. Covalent compound having complete octer but if central atom has unfilled d-orbital also act as electrophiles. All electrophiles are not always Lewis acid Which of the following is electrophilic in nature?

Which of the following species acts as electrophile ?

Electrophiles are electron seeking species. Which of the following groups contain only electrophiles ?

The electronic displacements in covalent bonds may occur either in the ground state under the influence of an atom or a substituent group or in presence of an appropriate attacking reagent. As a result of these electron displacements, centres of different electron densities are created and these centres are susceptible to attack by the reagents. These electron displacements occur through inductive electromeric, resonance and hyperconjugation effects. Whereas inductive effect involves displacement of sigam -electrons towards the substituent, resonance effect involves delocalization of pi- electrons transmitted through the chain and both are permanent effect. Electromeric effect is the complete transfer of a shared pair of pi - electrons to one of the atoms joined by a multiple bond on the demand of an attacking reagent. Hyperconjugation effects on the other hand involve delocalization of sigma -electrons of C-H bond of an alkyl group directly attached to an atom of unsaturated system (i.e., sigma-pi -conjugation). Both inductive and hyperconjugation effects can be used to explain the stability of carbocations and free radicals which follow the stability order : 3^(@)gt2^(@)gt1^(@) . The stability or carbanions, however, follows the reverse order. An organic reaction occurs through making and breaking of bonds. The breaking of a covalent bond may occur either homolytic leading to the formation of free radicals or heterolytic forming positively (carbocations) or negatively (carbanions) charged species. Most of the attacking reagents carry either a positive or a negative charge. The positively charged species with electron deficient centre or neutral species (free radicals, carbenes, nitrene) are collectively called electrophiles, while negatively charged species with electron rich centre or neutral species (like water, alcohol, ammonia, etc.) are called nucleophiles. Out of the following series, the one containing only electrophiles is:

Which of the following species has no 'd' electrons in the central metal atom is ?

HIMANSHU PANDEY-GENERAL ORGANIC CHEMISTRY-Linked Comprehension Type (Q.1 To Q.25)
  1. Electron deficient species are known as electrophiles. All positviely ...

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  2. Electron deficient species are known as electrophiles. All positviely ...

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  3. Electron deficient species are known as electrophiles. All positviely ...

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  4. When (C-H)sigma electrons are in conjugation to pi bond this conjugati...

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  5. When (C-H)sigma electrons are in conjugation to pi bond this conjugati...

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  6. When (C-H)sigma electrons are in conjugation to pi bond this conjugati...

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  7. In an aromatic ring, a functional group with lone pair of electron exe...

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  8. In an aromatic ring, a functional group with lone pair of electron exe...

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  9. In an aromatic ring, a functional group with lone pair of electron exe...

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  10. The process whereby a hydrogen atom attached to the alpha-carbon of ca...

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  11. The process whereby a hydrogen atom attached to the alpha-carbon of ca...

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  12. The process whereby a hydrogen atom attached to the alpha-carbon of ca...

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  13. In which of the following cations rearrangement takes place?

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  14. Under common reaction conditions, a carboncation rearranges to another...

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  15. Under common reaction conditions, a carboncation rearranges to another...

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  16. Type of anios in which delocatisation of negative charge occrur on mor...

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  17. Type of anios in which delocatisation of negative charge occrur on mor...

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  18. Type of anios in which delocatisation of negative charge occrur on mor...

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  19. In a substance that are resonance hybirds, the measured length of give...

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  20. In a substance that are resonance hybirds, the measured length of give...

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