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Questions and Answers
Which of the following best describes a Lewis acid?
Which of the following best describes a Lewis acid?
- A chemical species that readily donates its lone pair of electrons
- A chemical species that forms a dative bond with a Lewis base
- A chemical species with an empty orbital capable of accepting an electron pair from a Lewis base (correct)
- A chemical species with a filled orbital capable of donating an electron pair to a Lewis base
Which of the following is an example of a Lewis base?
Which of the following is an example of a Lewis base?
- CH4
- NH3 (correct)
- HCl
- H2O
In the context of a specific chemical reaction between NH3 and Me3B, what is formed?
In the context of a specific chemical reaction between NH3 and Me3B, what is formed?
- Me3B NH3
- Me3NH3
- NH3Me3
- NH3 BMe3 (correct)
What type of bond is formed in a Lewis adduct?
What type of bond is formed in a Lewis adduct?
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How are the terms nucleophile and electrophile related to Lewis acids and bases?
How are the terms nucleophile and electrophile related to Lewis acids and bases?
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Study Notes
Lewis Acids and Bases
- A Lewis acid is a species that accepts a pair of electrons to form a covalent bond.
- A Lewis base is a species that donates a pair of electrons to form a covalent bond.
Formation of Lewis Adducts
- In the reaction between NH3 and Me3B, a Lewis adduct is formed.
- A Lewis adduct is a compound that results from the formation of a covalent bond between a Lewis acid and a Lewis base.
Bonding in Lewis Adducts
- The bond formed in a Lewis adduct is a covalent bond, resulting from the sharing of a pair of electrons between the Lewis acid and Lewis base.
Nucleophiles and Electrophiles
- A Lewis base can also be referred to as a nucleophile, as it donates a pair of electrons to form a covalent bond.
- A Lewis acid can also be referred to as an electrophile, as it accepts a pair of electrons to form a covalent bond.
- The terms nucleophile and electrophile are related to Lewis acids and bases, as they describe the electron-donating and electron-accepting properties of these species.
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