Map det Sapling Learning maamillan learning An unknown carbonyl was reacted with
ID: 492997 • Letter: M
Question
Map det Sapling Learning maamillan learning An unknown carbonyl was reacted with 2,4-dinitrophenylhydrazine to produce a colored solid hydrazone. The melting point of the 2,4-dinitrophenylhydrazone derivative was found to be 125 °C. Use the data from the table of literature values for hydrazone melting points to identify the original carbonyl. 2,4-dinitrophenylhydrazone Move the label with the name of the original Name of carbon unknown carbonyl in the box below. melting point oC acetone 126 239 benzaldehyde 123 butanal 118 2-butanone heptanal 108 acetone 2-methylbutanal) heptanal 110 2-hexanone butanal propanal 2-pentanone 120 2-methylbutanal benzaldehyde 2-hexanone 148 propanal 3-pentanone 2-butanone 144 2-pentanone 3-pentanone 156Explanation / Answer
The observed 2,4-dinitrophenylhydrazone derivative was found to be 125 °C. 2 Carbonyl compound's 2,4-dinitrophenylhydrazone derivatives are closer to 125 °C. The carbonyl copounds are acetone and butanal. Among the carbonyl compounds, acetone is very closer to 125 °C. Hence the compound can be Acetone.