Answer now: rum differences between the starting mate- and the product, 3-(N-phe
ID: 555413 • Letter: A
Question
Answer now: rum differences between the starting mate- and the product, 3-(N-phenylamino)-1,3- 1. Describe the infrared spectrum rial, benzalacetophenone, diphenyl-1 2. Sugges propanone, in this experiment uggest a synthesis of densation (Claisen-Schmidt reaction). Identify the products in the following reactions: one usi racetophenone using a crossed aldol con- 3. a. b. O HCI C,H14N2 (CH3),CHCH= CH-CH NH,CH,NH, c. + d. O + NH 4. Why is 3-(N-phenylamino)-1,3-diphenyl-1-propanone white, while the reactant (chalcone) is yellow? (Hint: Use your knowledge about conju- gation and UV/visible spectrophotometry.) 5. If the product does not precipitate, it is recommended that the solu- tion not be boiled down. Why?Explanation / Answer
reactant: alkene C-H streatching at around 3300 cm-1 is present but absent at product and the babd is relatively sharp
Product: N-H streatching of secondery amon present 3000-3500 cm-1 that absent in the reactant and the band is relatively broad.