Question 3\ The

^(1)H

NMR of vanillin in

CDCl_(3)

is provided with integration and splitting listed under the

x

-axis. Assign the hydrogen environments a, b, c, d, e, f. Note there is overlap of two hydrogens at

7.5ppm

and the peak at 6.4 ppm disappears upon addition of

D_(2)O

.

The 1H NMR of vanillin in CDCl3 is provided with integration and splitting listed under the x-axis. Assign the hydrogen environments a, b, c, d, e, f. Note there is overlap of two hydrogens at 7.5 ppm and the peak at 6.4 ppm disappears upon addition of D2O