Which of the following does not show electromeric effect?a)ethersb)ketonesc)aldehydesd)alkenesCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Electromeric effect is shown by those compounds containing multiple bonds. When a double bond or triple bond is attacked by an attacking reagent, a pair of bonding electrons involved in the pi bond is transferred completely from one atom to another. This effect will remain as long as the attacking reagent is present. As soon as the reagent is removed, the polarized molecule will come back to the original state

Answer

Bcoz in ethers double bond is not present.

Answer

Ethers are a class of organic compound they contain an ether group-an oxygen atom connected two to alkyl or aryl groups. They have the general formula R-O-R where R and R represent the alkyl or ary groups

Answer

The electromeric effect refers to the movement of electrons from one atom or group to another in a chemical reaction. It occurs due to the polarization of sigma bonds or the presence of a polarizable group. Let's analyze each option to determine which one does not show the electromeric effect.

a) Ethers: Ethers are organic compounds that have a central oxygen atom bonded to two alkyl or aryl groups. The oxygen atom in ethers is electronegative, which means it can withdraw electron density away from the alkyl or aryl groups. This polarization of the sigma bond between the oxygen and carbon atoms can lead to the movement of electrons, showing the electromeric effect. Therefore, ethers can exhibit the electromeric effect.

b) Ketones: Ketones are organic compounds that have a carbonyl group (C=O) bonded to two alkyl or aryl groups. The carbonyl group is polar due to the electronegativity difference between the carbon and oxygen atoms. This polarization can lead to the movement of electrons, showing the electromeric effect. Therefore, ketones can exhibit the electromeric effect.

c) Aldehydes: Aldehydes are organic compounds that have a carbonyl group (C=O) bonded to at least one hydrogen atom and one alkyl or aryl group. Similar to ketones, the carbonyl group in aldehydes is polar, allowing for the movement of electrons and the manifestation of the electromeric effect. Therefore, aldehydes can exhibit the electromeric effect.

d) Alkenes: Alkenes are unsaturated hydrocarbons that contain a carbon-carbon double bond. The pi bond in alkenes is electron-rich and can be attacked by electron-deficient species. This characteristic can lead to the movement of electrons, showing the electromeric effect. Therefore, alkenes can exhibit the electromeric effect.

Based on the analysis above, the option that does not show the electromeric effect is a) ethers.

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