[THC]

Hi

I need some help with the attached MS spectra.

I have to find out what the compound is. I'm told it is a good idea to look at the peak at m/z= 31, 45 and 46.

According to a table we've been giving, a nitro compound fits the m/z = 46 (another hint is: z = 1). Since the largest m/z = 46, the compound contains 1,3,5... N. But I can't figure out the other peaks.
m/z = 31 and 45indicates an alcohol or ether while 45 also indicates a carboxylic acid.

I don't think the peak at 46 is caused by isotopes since none of the elements fits the ~40% intensity relative to 45.

Any help appreciated.

[DrCMS]

46 to 45 loss of H
46 to 31 loss of CH3

[THC]

So it's CH3-NO3?

[DrCMS]

No

[THC]

Hmm, I don't get it. Isn't the highest m/z supposed to be the molar mass (when z = 1)? In this case, the largest m/z= 46. But... I know that the compound contains -NO2 and the molar mass of that is 46.

[DrCMS]

Hmm, I don't get it. Isn't the highest m/z supposed to be the molar mass (when z = 1)?

Yes

In this case, the largest m/z= 46. But... I know that the compound contains -NO2 and the molar mass of that is 46.

How do you know it contains NO2?