CHEM 141 Midterm: notes first midterm

Printout Fn Mar 24 13:07 59 2017 (GMT-0700) 4000.12 Absolute threshold: 96.531 643.71 88,820 74064 215.74 822.305 1261.36 76.744 1437.77 Intensity 96.142 4E442 89.806

Assume that the^1 H NMR spectrum shown below was obtained on your isolated reaction product. Note that the frequency range of the original spectrum was -0.5 - 12 ppm, but the downfield range (~10 - 12 ppm) was deleted in the printout because no signals were detected downfield of 9 ppm. a) Draw the chemical structure of the beta-hydroxyketone intermediate. b) Is there any beta-hydroxyketone contained in your reaction product? Why or why not? Refer to your drawn structure as necessary.

Tuesday, October 31, 2017 7.37 PM Date Tuesday, October 31, 2017 7:37 PM 3500 3000 2500 2000 1671.091500 1000 450 4000 cm-1 Students 30 88.65 %T Sample 030 By Students Date Tuesday, Oct ber 31 2017