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A: Methylene has a sextet of overline e^...

A: Methylene has a sextet of `overline e^, s`.
R: Methylene behaves as a nucleophile.

A

If both (A) and ( R) are true and ( R) is the correct explanation of (A).

B

If both (A) and ( R) are true but ( R) is not correct explanation of (A).

C

If (A) is true but ( R) is false.

D

If (A) is false but ( R) if true.

Text Solution

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The correct Answer is:
To solve the question, we need to analyze both the assertion (A) and the reason (R) provided. ### Step 1: Understanding the Assertion (A) The assertion states that "Methylene has a sextet of electrons." - Methylene, which is represented as \( \text{CH}_2 \), is a type of carbene. - In methylene, the carbon atom is bonded to two hydrogen atoms and has two unshared electrons, leading to a total of six valence electrons (2 from the two hydrogen atoms and 4 from the carbon atom). - Therefore, the assertion is **true**. ### Step 2: Understanding the Reason (R) The reason states that "Methylene behaves as a nucleophile." - A nucleophile is defined as an electron-rich species that donates an electron pair to form a chemical bond. - Methylene, having a sextet of electrons, is actually electron-deficient because it has only six electrons instead of the eight needed for a stable octet. - This electron deficiency means that methylene acts as an electrophile rather than a nucleophile, as it seeks to accept electrons to complete its octet. - Therefore, the reason is **false**. ### Conclusion Based on the analysis: - Assertion (A) is true: Methylene has a sextet of electrons. - Reason (R) is false: Methylene does not behave as a nucleophile; it behaves as an electrophile. Thus, the final answer is that A is true, but R is false.
To solve the question, we need to analyze both the assertion (A) and the reason (R) provided. ### Step 1: Understanding the Assertion (A) The assertion states that "Methylene has a sextet of electrons." - Methylene, which is represented as \( \text{CH}_2 \), is a type of carbene. - In methylene, the carbon atom is bonded to two hydrogen atoms and has two unshared electrons, leading to a total of six valence electrons (2 from the two hydrogen atoms and 4 from the carbon atom). - Therefore, the assertion is **true**. ...
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