Question: Compounds that contain both carbonyl and alcohol functional groups are often more stable as cyclic hemiacetals or cyclic acetals than as open-chain compounds. Examples of

Compounds that contain both carbonyl and alcohol functional groups are often more stable as cyclic hemiacetals or cyclic acetals than as open-chain compounds. Examples of several of these are shown. Deduce the structure of the open-chain form of each.
(a)

(b)

(c)

Compounds that contain both carbonyl and alcohol functional groups are

(d)

0 CH CH CH 2 Brevicomin (sex attractant of Western pine beetle) 0 HOCH2 Talaromycin A (a toxic substance produced by a fungus that grows on poultry house litter)

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