The electromeric effect is the movement of electrons from one atom to another as a reagent attacks a π bond. +E effect: In the positive electromeric effect the pi electrons of the multiple bond are transferred to that atom to which the attacking reagent is bonded. -E effect. This lesson will discuss inductive, mesomeric and electromeric effects with examples. We will also discuss some of the factors affecting electron.

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The most common attacking reagents that initiate the electromeric effect are the polar reagents. This is due to which of the following effects.

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Greater the number of hydrogen atoms attached to the carbon atom greater will be the electron release. This involves a complete transfer of electrons. This page was last edited on 25 Decemberat Electromeric effect can be defined as the transfer of electrons from a double bond or an atom with a lone pair of electrons to an adjacent single bond.

Hence, complete negative and positive charges are formed on the molecule. You can help Wikipedia by expanding it.

Electromeric effect Organic Chemistry – Some Basic Principles and Techniques-Chemistry – Class 11

Inductive effect is a permanent effect operating in the ground state of the organic molecules and health is responsible for high melting point white and dipole moment of Polar compounds. They are not temporary effects but are permanent none Answer: For example 2-methyl propene with six C-H bonds is more stable than propylene. Inductive effect Mesomeric effect Electromeric effect Hyperconjugation Answer: Please do send us a request for Electromeric Effect Bond Polarization tutoring and experience the quality yourself.


Heterolytic fission is usually indicated by a curved arrow which denotes a two electron displacement. In these reactions, the electron pair moves away from electrommeric attacking reagent. Please do send us the Inductive Effect of Hyperconjugation Bond Polarization problems on which you need Help and we will forward then to our tutors for review.

This approach of breaking down a problem has been appreciated by majority of our students for learning Electromeric Effect Bond Polarization concepts. These effects include the electromeric effect and the hyperconjugation. Views Read Edit View electrimeric. This effect will remain as long as the attacking reagent is present. It usually occurs in polar covalent bond and is favoured by polar solvents. Electromeric effect Inductive effect Mesomeric effect Hyperconjugation Answer: Solved problems Methyl amine is considered stronger than ammonia.

As can be seen above, the transfer of electrons takes place towards a eletromeric electronegative atom. As soon as the reagent is removed, the polarized molecule will come back to the original state. Electromeric effect is of two types: Retrieved from ” https: The -E effect can be found in reactions such as addition electdomeric nucleophiles to carbonyl compounds.

This effect can best be represented as follows. It involves the complete transfer of electrons of a multiple bond to one of the bonded atom in presence of an electron attacking reagent.

Electromeric effect

Wikipedia articles needing clarification from May All stub articles. As soon as the reagent is removed, the molecule reverts back to its original position. Our tutors are highly qualified and hold advanced degrees. As the electromeric effect is seen only in the presence of an attacking agent, this effect is said to promote the reactions rather than inhibiting them.

However, this effect remains as long as the attacking molecule is electromerc. The effect disappears as the attacking agent is removed.


This effect is temporary and takes place only in the presence of a reagent. After the transfer takes place, effecr reagent gets attached to the atom where the electrons have been transferred to.

This organic chemistry article is a stub. Therefore, in the presence of attacking reagent, one bond is lost and this negatively charged attacking reagent links to the carbon having positive charge. Addition of acids to alkenes.

Inductive and Electromeric Effect

This effect is shown by those compounds containing multiple bonds. Our tutors can break down a complex Electromeric Effect Bond Polarization problem into its sub parts and explain to you in detail how each efdect is performed.

Click for More Uploads. As they occur only in the presence of a attacking agent and disappear as the attacking agent is removed They exist only for certain time period.

Our tutors who provide Inductive Effect of Hyperconjugation Bond Polarization help are highly qualified. If the electrons of the double bond are transferred to an atom of the double bonds other than the one to which the reagent gets finally attached the effect is called -E Effect. Thus, methyl with three hydrogen atoms shows a greater effect when compared to ethyl with only two such hydrogen atoms. Heterolytic fission results in the formation of charged species i. There are two types of inductive effect: By using this site, you agree to the Terms of Use and Privacy Policy.

The carbon thus becomes deprived of its share in this transferred pair of electrons elecyromeric acquires positive charge.