Organic Chemistry

Problems 583

59. How could the signals in the 6.5–8.1-ppm region of their NMR spectra distinguish among the following compounds?


60. The NMR spectra of two compounds with molecular formula are shown here. Identify the compounds.


61. Draw a splitting diagram for the proton if and

CC

a

c b

Cl

H

CH 2 Cl

H

Hb Jbc= 10 Jba=5.

87654 3210

10 9 8765 4 3210

a.

b.

δ (ppm)

frequency

δ (ppm)

frequency

1 H C 11 H 16

OCH 3 OCH 3 OCH 3

NO 2

NO 2

NO 2

1 H