Question

Carbonyl compounds Semicarbazones 2,4-Dinitrophenylhydrazones Mix 1 mL of semicarbazide hydrochloride with 40 mg of your Mix 2.5 mL of 2.4-Dinitrophenylhydrazin in phosphoric acid and 25 unknown. Add 1 mL of methanol to make the solution clear. mg of your unknown. Warm in a water bath for 5 min and then let crystallization proceed. Collect the product by suction filtration and Add 15 drops of pyridine and warm on a water bath for 5 min. Cool to room temperature, put in ice, and scratch to induce wash the crystals with cold water. Recrystallize from ethanol and let crystallization. Collect the product by suction filtration and it dry until next time. wash with cold water. Recrystallize from methanol, ethanol, or ethanol-water mixture and let it dry until next time. NH-NH2 NO2 N-NH- R- R' O2N O R- R' N-N NH2 O2N R 2ON R. H2N N-NH2 Determine the melting points of all derivatives, narrow down the list of possible candidates, and choose your unknown neutral compound. Organize all the data into Tables 3 and 4 (see next page), and include these tables into your conclusion.

Would you please draw the arrow pushing mechanism for these two reactions?

Answer 1

N-NH-C-NH2 ΝΗ-ΝΗΣ mechanismi R. HN-NH-C-NH Он й N NH-C-NH2 HOI HAO 67 N-NH-C- - MH-NH --NH). -H N-NH-C-NH2 BR-2-mm. 70, R3----- N-NH-CNH, ze

NH- NH 2 N- Ruyao + I . - Ñ - RR NO2 -NO2 -NO 2 O + RKO H OH + HN-NHOkNo, NOG From H3PO4 HE - NO N-NE 2- -:Z N-NH -ND 2 NO2 I - H NO 2 -10 --- N_ NH- ND2 SENNH -| NO2 NO2 Product