Aldehydes and ketones react with one molecule of an alcohol to form compounds called hemiacetals, in which there is one hydroxyl group and one ether-like group. Reaction of a hemiacetal with a second molecule of alcohol gives an acetal and a molecule of water. ROH OH ROH OR + H,O OR COR The carbonyl group of an aldehyde or a ketone an -OR group to A hemiacetal (has an -OH and An acetal (has two-OR groups to the same carbon) the same carbon) OH H+ OH cis-1,2-Cyclohexanediol Acetone

Aldehydes and ketones react with one molecule of an alcohol to form compounds called hemiacetals, in which there is one hydroxyl group and one ether-like group. Reaction of a hemiacetal with a second molecule of alcohol gives an acetal and a molecule of water. ROH OH ROH OR + H,O OR COR The carbonyl group of an aldehyde or a ketone an -OR group to A hemiacetal (has an -OH and An acetal (has two-OR groups to the same carbon) the same carbon) OH H+ OH cis-1,2-Cyclohexanediol Acetone

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter19: Aldehydes And Ketones: Nucleophilic Addition Reactions

Section19.SE: Something Extra

Problem 39MP

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