6.3 Which of the curved arrows is valid? (a) (b) 5-H Ἡ (H+ H3C-NEN: NEN (c) (d) to

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**6.3 Which of the curved arrows is valid?**

**Diagrams:**

(a) The molecule displayed is an alcohol, with the structure featuring a carbon chain bonded to an oxygen atom. The oxygen atom has lone pairs, and a curved arrow starts from one of these lone pairs pointing towards the carbon-oxygen bond.

(b) The molecule displayed is a diazonium compound, specifically a methyl diazonium ion (H₃C–N⁺≡N:). A curved arrow begins at the nitrogen atom with a lone pair and points towards the adjacent nitrogen-nitrogen triple bond.

(c) The molecule displayed is a cyclohexene, with a double bond in the cyclohexane ring. A curved arrow points from the starting of the double bond to form a new double bond position within the ring.

(d) The molecule shown is a carbonyl compound with a double-bonded oxygen that has lone pairs at the top. A curved arrow is directed from the π bond between carbon and oxygen, indicating a potential bond movement.

**Explanation:**
These diagrams illustrate various curved arrows representing electron movement in potential reaction mechanisms. The question asks which arrow accurately depicts a valid mechanism step.
Transcribed Image Text:**6.3 Which of the curved arrows is valid?** **Diagrams:** (a) The molecule displayed is an alcohol, with the structure featuring a carbon chain bonded to an oxygen atom. The oxygen atom has lone pairs, and a curved arrow starts from one of these lone pairs pointing towards the carbon-oxygen bond. (b) The molecule displayed is a diazonium compound, specifically a methyl diazonium ion (H₃C–N⁺≡N:). A curved arrow begins at the nitrogen atom with a lone pair and points towards the adjacent nitrogen-nitrogen triple bond. (c) The molecule displayed is a cyclohexene, with a double bond in the cyclohexane ring. A curved arrow points from the starting of the double bond to form a new double bond position within the ring. (d) The molecule shown is a carbonyl compound with a double-bonded oxygen that has lone pairs at the top. A curved arrow is directed from the π bond between carbon and oxygen, indicating a potential bond movement. **Explanation:** These diagrams illustrate various curved arrows representing electron movement in potential reaction mechanisms. The question asks which arrow accurately depicts a valid mechanism step.
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