The temporary effect in which there is a complete transfer of shared pair of - electrons to one of the atoms joined in a multiiple bond on the demand of an attacking reagent is called-

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Standard XII

Chemistry

Electromeric Effect

The temporary...

Question

The temporary effect in which there is a complete transfer of shared pair of $π -$ electrons to one of the atoms joined in a multiiple bond on the demand of an attacking reagent is called;

inductive effect

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electromeric effect

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hyper conjugation

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negative resonance effect

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Solution

The correct option is B electromeric effect
Electromeric effect. In electrophilic addition of alkenes, double bond is polarised in the presence of attacking reagent.
Example:

$C H_{2} = C H_{2} + B r^{+} \to C H_{2}^{δ +} - C H_{2}^{δ -}$

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Similar questions

Q. Assertion :When inductive and electromeric effects operate in opposite direction, the inductive effect predominates. Reason: Inductive effect is the complete transfer of shared pair of

π

electrons to one of the atoms.

Q. Assertion :The electromeric effect is brought into play only at the requirement of the reagent. Reason: It is temporary effect in which bond pair is shifted to one of the constituent atoms.

Q. The displacement of electrons in a multiple bond in the presence of attacking reagent is called:

A bond is formed between two atoms by sharing a pair of electrons, provided entirely by one of the combining atoms but shared by both is called __ bond.

Q. Give a single term for the following statements:
a) The tendency of atoms to have eight electrons in the outer shell.
b) Energy required to remove a valence electron to have an isolated atom.
c) The pair of electrons that are not involved in bond formation.
d) Tendency of an atom to attract bonded pairs of electrons towards itself in a molecule.
e) Bonds in which shared electron pair comes from one of the bonded atoms.

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The temporary effect in which there is a complete transfer of shared pair of π− electrons to one of the atoms joined in a multiiple bond on the demand of an attacking reagent is called;

The correct option is B electromeric effectElectromeric effect. In electrophilic addition of alkenes, double bond is polarised in the presence of attacking reagent. Example: CH2=CH2+Br+→CHδ+2−CHδ−2

The temporary effect in which there is a complete transfer of shared pair of $π -$ electrons to one of the atoms joined in a multiiple bond on the demand of an attacking reagent is called;

The correct option is B electromeric effect
Electromeric effect. In electrophilic addition of alkenes, double bond is polarised in the presence of attacking reagent.
Example:

$C H_{2} = C H_{2} + B r^{+} \to C H_{2}^{δ +} - C H_{2}^{δ -}$