Problem 20. Show the ylide and an aldehyde or ketone that you need to make the following: a. H3CCH,CH,CH=C-CH,CH3 ČH3 b. CH3 -c=CH-CH * CH'CHICHO CH с. -CH=CH- d. 2 (H CPCHCOCH COCH CH-CH3

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Diol

In chemistry there are so many chemical compounds that have a hydroxyl group but a chemical compound having two hydroxyl groups (-OH) is termed as a diol. It also implies the presence of two alcohols whereas polyols contain two or more than two hydroxyl groups (-OH). Glycol or 1,2-diol is an aliphatic diol that has two alcohol groups on adjacent carbon atoms. In industries, the most commonly used diol is ethylene glycol.