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Unknown compounds can be converted to derivatives such as a 2,4-dinitrophenylhydrazone (2,4- DNP) or semicarbazone, and then the melting points of the derivatives are used to determine the identity. Use the data in the following table to identify the unknown: Compound Butanal bp (°C) 2,4-DNP mp (°C) Semicarbazone mp (°C) 75 123 95 Propanal 48 148 89 2-Butanone 80 117 146 3-Pentanone 102 156 138 2-Heptanone 151 89 123 You determine the boiling point and the following melting points for derivatives of your unknown: Your data: • Semicarbazone mp: 141-143 °C 2,4-dinitrophenylhydrazone (2,4-DNP) mp: 114-116 °C Your unknown is: 1) 2) 4) H ~ 요

Unknown compounds can be converted to derivatives such as a 2,4-dinitrophenylhydrazone (2,4- DNP) or semicarbazone, and then the melting points of the derivatives are used to determine the identity. Use the data in the following table to identify the unknown: Compound Butanal bp (°C) 2,4-DNP mp (°C) Semicarbazone mp (°C) 75 123 95 Propanal 48 148 89 2-Butanone 80 117 146 3-Pentanone 102 156 138 2-Heptanone 151 89 123 You determine the boiling point and the following melting points for derivatives of your unknown: Your data: • Semicarbazone mp: 141-143 °C 2,4-dinitrophenylhydrazone (2,4-DNP) mp: 114-116 °C Your unknown is: 1) 2) 4) H ~ 요

Organic Chemistry
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter23: Amines
Section: Chapter Questions
Problem 23.39P
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Unknown compounds can be converted to derivatives such as a 2,4-dinitrophenylhydrazone (2,4- DNP) or semicarbazone, and then the melting points of the derivatives are used to determine the identity. Use the data in the following table to identify the unknown: Compound Butanal bp (°C) 2,4-DNP mp (°C) Semicarbazone mp (°C) 75 123 95 Propanal 48 148 89 2-Butanone 80 117 146 3-Pentanone 102 156 138 2-Heptanone 151 89 123 You determine the boiling point and the following melting points for derivatives of your unknown: Your data: • Semicarbazone mp: 141-143 °C 2,4-dinitrophenylhydrazone (2,4-DNP) mp: 114-116 °C Your unknown is: 1) 2) 4) H ~ 요
Transcribed Image Text:Unknown compounds can be converted to derivatives such as a 2,4-dinitrophenylhydrazone (2,4- DNP) or semicarbazone, and then the melting points of the derivatives are used to determine the identity. Use the data in the following table to identify the unknown: Compound Butanal bp (°C) 2,4-DNP mp (°C) Semicarbazone mp (°C) 75 123 95 Propanal 48 148 89 2-Butanone 80 117 146 3-Pentanone 102 156 138 2-Heptanone 151 89 123 You determine the boiling point and the following melting points for derivatives of your unknown: Your data: • Semicarbazone mp: 141-143 °C 2,4-dinitrophenylhydrazone (2,4-DNP) mp: 114-116 °C Your unknown is: 1) 2) 4) H ~ 요
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