Question: Compound D, C4H8O, shows a downfield singlet in its 'H-NMR spectrum. Is it compound a or b? Isomer set #1: O SOCCHICH CHICOCH.CH a

Compound D, C4H8O, shows a downfield singlet in its 'H-NMR spectrum. Is it compound a or b? Isomer set #1: O SOCCHICH CHICOCH.CH a b Isomer set #2: O CHOCCHCH CHCOCH,CHS a b Compound D, C4llgO2,

Compound D, C4H8O, shows a downfield singlet in its 'H-NMR spectrum. Is it compound a or b? Isomer set #1: O SOCCHICH CHICOCH.CH a b Isomer set #2: O CHOCCHCH CHCOCH,CHS a b Compound D, C4llgO2, shows a downfield quartet in its H-NMR spectrum. Is it compound a or b?

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