According to Lewis concept of acids and bases ethers are:a)Neutralb)Acidicc)Basicd)AmphotericCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Ya ...its a Lewis base because vof presence of two lone pairs for donation

Answer

Ethers behave as Lewis bases due to the presence of two lone pair of electrons on oxygen atom.##@

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Yes ether have lone pair of electrons due to which it behaves like lewis base

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C

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Because there are two lone pairs available on the oxygen atom.So it can donate a lone pair to an electrophile/Lewis acid..Since oxygen atom in ether is donor of electrons,By defination it is Lewis base.

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Basic

Answer

Lewis Concept of Acids and Bases and Ethers

Introduction:
The Lewis concept of acids and bases, proposed by Gilbert N. Lewis, defines an acid as an electron pair acceptor, and a base as an electron pair donor. According to this concept, the acid-base reaction involves the transfer of an electron pair from the base to the acid.

Acidity and Basicity of Ethers:
Ethers are organic compounds that contain an oxygen atom bonded to two alkyl or aryl groups. In the Lewis concept of acids and bases, ethers can act as both acids and bases, but they are generally considered to be weak bases.

Ethers as Lewis Bases:
Ethers have lone pairs of electrons on the oxygen atom, which can be donated to an electron-deficient species, making ethers Lewis bases. When ethers act as bases, they donate their lone pair of electrons to an acid, forming a coordinate covalent bond. The oxygen atom donates its lone pair to the acid to form a coordinate covalent bond.

Formation of Complexes:
When ethers act as bases, they can form complexes with Lewis acids. The oxygen atom of the ether donates its lone pair of electrons to the Lewis acid, forming a complex. The formation of these complexes is an example of Lewis acid-base reactions.

Example:
One example of an ether acting as a Lewis base is the reaction between diethyl ether (C2H5)2O and boron trifluoride (BF3). In this reaction, the lone pair of electrons on the oxygen atom of the ether is donated to the boron atom of the Lewis acid, forming a complex.

Amphoteric Nature of Ethers:
While ethers are generally considered weak bases, they can also exhibit acidic properties in certain reactions. This makes them amphoteric, meaning they can act as both acids and bases. The specific behavior of ethers as acids or bases depends on the reaction conditions and the nature of the other reactants involved.

Conclusion:
In summary, according to the Lewis concept of acids and bases, ethers are classified as basic. They can act as electron pair donors, forming coordinate covalent bonds with Lewis acids. However, ethers can also exhibit acidic properties in certain reactions, making them amphoteric. The acidity or basicity of ethers depends on the specific reaction conditions and the nature of the other reactants involved.

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