Name____________________________

1. On a 200 MHz instrument, 0.15 ppm in the proton spectrum corresponds to _______ Hz. On the same instrument C-13 is run at a frequency of 51 MHz. On its spectrum, 0.15 ppm corresponds to __________ Hz.

a) 3, 3 b) 30, 8 c) 15, 15 d) 3, 1 e) 30, 30

2-4. Consider the NMR of 2 chloro-propanol, CH3CH(Cl)CH3.

2. The proton spectrum will consist of a :

a) a singlet, and a multiplet (splitting greater than 4)

b) a quartet, and a doublet.

c) a doublet, and a multiplet.

d) two doublets and a multiplet

e) a triplet, and a doublet

3. From the highest chemical shift to the lowest, integration of the peaks will be:

a) 1:3 b) 1:3:3 c) 1:6

d) 3:1:3 e) 3:3:1

4. The decoupled carbon spectrum will consist of ____ peak(s).

a) 1 b) 2 c) 3 d) 4

5. Carbon spectra need to be run on _______ (more or less) concentrated samples than proton spectra. The magnet need _________ tuning to run carbon compared to Hydrogen.

a) more, more b) more, less

c) less, less d) less, more

6. Nucleus X has a spin of 1/2 and has a % abundance of 82.5%. It's absorption frequency is at 75 MHz on an XL-200 instrument and the expected chemical shift range is 150 ppm. To do the NMR of a compound of this nucleus, the solution should be:

a) concentrated b) dilute

c) either concentrated or dilute solutions should give a good spectra (well resolved and with good signal to noise)

7. The proton frequency on a magnet with a field of 200 MHz is 46000 gauss. What is the field strength on an instrument when the proton frequency is 60 MHz?

a) 13800 gauss b) 153333 gauss c) 4140 gauss d) none of these

8. Deuterium (H-2 or D) has a spin of 1 and therefore has _______ orientations corresponding to m_l values of ________________.

a) 2; -1,1 b) 3; -1/2,0,+1/2 c) 3; -1,0,1 d) none of these are correct.