Asked in ETEA MDCAT 2015 2015Moderate

Hemiacetal containing both

Correct answer: B. Alcohol and ether functional groups

  • A. Alcohol and aldehyde functional groups
  • B. Alcohol and ether functional groups
  • C. Aldehyde and ether functional groups
  • D. Alcohol and carboxylic acid functional groups

Explanation

Hemiacetal is a molecule made up of a core carbon atom connected to four groups: -OR, -OH, -R, and -H. Acetal is a molecule made of a core carbon atom that is attached to two -OR groups, a -R group, and a -H group. RHC(OH)OR' is the general formula for a hemiacetal.orHemiacetals are formed from the combination of alcohols and aldehydes and display at least one hydroxyl group from the alcohol and have an ether functional group with oxygen connecting 2 carbons

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About Nucleophilic Addition Reactions

Nucleophilic addition occurs at the polar carbonyl group of aldehydes and ketones, where a nucleophile attacks the electron-deficient carbon atom. Reactions with hydrogen cyanide, sodium bisulfite, alcohols and Grignard reagents are explained through tetrahedral intermediates, acid or base catalysis, and the different reactivity of aldehydes and ketones.

Practise Aldehydes and Ketones

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