Identify X and Y in the following synthetic scheme and write their structures. Explain the formation of labelled formaldehyde ( H 2 overset*C O ) as one of the products when compound (Z) is treated with HBr and subsequently ozonolysed. Mark the C* carbon in the entire scheme.

Question

Identify X and Y in the following synthetic scheme and write their structures. Explain the formation of labelled formaldehyde ( H 2 overset*C O ) as one of the products when compound (Z) is treated with HBr and subsequently ozonolysed. Mark the C* carbon in the entire scheme. (A)  (B)  (C)  (D)

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Q. Identify X and Y in the following synthetic scheme and write their structures. Explain the formation of labelled formaldehyde (H2​C∗O) as one of the products when compound (Z) is treated with HBr and subsequently ozonolysed. Mark the C∗ carbon in the entire scheme.

Q. Identify $X$ and $Y$ in the following synthetic scheme and write their structures. Explain the formation of labelled formaldehyde $(H_{2} C * O)$ as one of the products when compound $(Z)$ is treated with $H B r$ and subsequently ozonolysed. Mark the $C^{*}$ carbon in the entire scheme.