Question

1. Using the IR correlation table on the second image, indicate how you could distanguish between the following pairs of compounds by using infrared spectroscopy. Give two specific absence/appearance of wavrnumbers for each compound:

2. For this experiment, what is the purpose of adding acetone? Predict what would happen if you omitted the acetone in the experimental procedure.

3. Draw four different resonance structures of the triphenylmethyl cation.

PRE-LAB QUESTIONS 1. Using the IR correlation table on page 75 of this lab manual, indicate how you could distinguish between the following pairs of compounds by using infrared spectroscopy. Give two specific absence/appearance of wavenumbers for each compound: B

*IR correlation table

Answer 1

0 (A) ryo This is conjugate No cargugatis 1415-168om 1750-1705 These two compounds are a by peek at 21700 unit. (B) nion rior 3200-2500 unt . No pula al 3200 cent canboxylic and showe Broad peek at 3200-2500 ent which is not prefent an este ampound (0) ņe No pekat peek al 2080 s (=C-H) 3100 innt 1600 m Alkene hay IR abosophion at 1680-16ro ent (C=C) § 3100-3000 un (=l-H). aulich is not prefeul în Alkane chriphery methyl Celle lesonanu stouture of uleconans Strinture.