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Answer key: Aldehydes and ketones

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Part A: draw the structure

  1. propanalSkeletal structure of propanalCondensed formula: CH₃–CH₂–CHO
  2. butanalSkeletal structure of butanalCondensed formula: CH₃–CH₂–CH₂–CHO
  3. ethanalSkeletal structure of ethanalCondensed formula: CH₃–CHO
  4. cyclohexanoneSkeletal structure of cyclohexanone
  5. 2-methylpropanalSkeletal structure of 2-methylpropanalCondensed formula: CH₃–CH(CH₃)–CHO
  6. 2-methylcyclohexan-1-oneSkeletal structure of 2-methylcyclohexan-1-one
  7. pentane-2,4-dioneSkeletal structure of pentane-2,4-dioneCondensed formula: CH₃–CO–CH₂–CO–CH₃
  8. but-3-en-2-oneSkeletal structure of but-3-en-2-oneCondensed formula: CH₃–CO–CH=CH₂
  9. 3-oxobutanalSkeletal structure of 3-oxobutanalCondensed formula: CH₃–CO–CH₂–CHO
  10. 1-phenylethan-1-oneSkeletal structure of 1-phenylethan-1-one

Part B: name the structure

  1. Skeletal structure of propan-2-onepropan-2-oneCondensed formula: CH₃–CO–CH₃
  2. Skeletal structure of butan-2-onebutan-2-oneCondensed formula: CH₃–CO–CH₂–CH₃
  3. Skeletal structure of 3-methylbutanal3-methylbutanalCondensed formula: CH₃–CH(CH₃)–CH₂–CHO
  4. Skeletal structure of pentan-3-onepentan-3-oneCondensed formula: CH₃–CH₂–CO–CH₂–CH₃
  5. Skeletal structure of 3,3-dimethylbutan-2-one3,3-dimethylbutan-2-oneCondensed formula: CH₃–CO–C(CH₃)₂–CH₃
  6. Skeletal structure of 4-methylpentan-2-one4-methylpentan-2-oneCondensed formula: CH₃–CO–CH₂–CH(CH₃)–CH₃
  7. Skeletal structure of cyclohexanecarbaldehydecyclohexanecarbaldehyde
  8. Skeletal structure of 4-hydroxybutan-2-one4-hydroxybutan-2-oneCondensed formula: CH₃–CO–CH₂–CH₂OH
  9. Skeletal structure of cyclohex-2-en-1-onecyclohex-2-en-1-one

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