1.) What is the purpose of making derivatives of unknowns?
2.) Give three reasons why acetone might interfere with yourresults.
3.) An unknown sample does not react with2,4-dinitrophenylhydrazine reagent, but a color change is observedon reaction with ceric nitrate reagent. Draw the structure of acompound that would give this result.
4.) An unknown sample produces a precipitate upon reaction with2,4-dinitrophenylhydrazine reagent. Draw the structure of acompound that would give this result.
5.) The unknown in question 4 causes Schiff's reagent to turn amagenta color. Draw the structure of a compound that would givethis result.
6.) An unknown sample produces a reddish precipitate uponreaction with 2,4-dinitrophenylhydrazine reagent, no color changewith Schiff's reagent, and a yellow precipitate when mixed withiodine and base. Draw the structure of a compound that would givethis result.
7.) Using chemical tests how would you distinguish among1-pentanol, 2-pentanone, 3-pentanone, and pentanal?
8.) Draw the 1H NMR spectrum of 2-pentanone. Include chemicalshifts, splittings, and areas of signals
