A carbonyl compound P ( from above given i-iii), which gives positive iodoform test, undergoes reaction woth MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.Pi. MeMgBr−−−−−−−→ii. H+,H2O H2SO4−−−−→ΔQ i. O3−−−−−−−→ii.Zn−H2OR OH−−−−→ΔSThe structure of Q and R are respectively:

A carbonyl compound P ( from above given i-iii), which gives positive

1.	A carbonyl compound P ( from above given i-iii), which gives positive iodoform test, undergoes reaction woth MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.Pi. MeMgBr−−−−−−−→ii. H+,H2O H2SO4−−−−→ΔQ i. O3−−−−−−−→ii.Zn−H2OR OH−−−−→ΔSThe structure of Q and R are respectively:
Answer» A carbonyl compound P ( from above given i-iii), which gives positive iodoform test, undergoes reaction woth $M e M g B r$ followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. $P i . M e M g B r - ------ \to i i . H^{+}, H_{2} O H_{2} S O_{4} - --- \to Δ Q i . O_{3} - ------ \to i i . Z n - H_{2} O R O H^{-} - -- \to Δ S$ The structure of Q and R are respectively: