[xshadow]

Hi!!

I would know the right molecule assocoated to tjis mass mass spectrum

Is there a site that can give me the right molecule 
Thanks

[Babcock_Hall]

Here are some thoughts.  You can sometimes apply the rule of 12 and the nitrogen rule to good effect.  Try subtracting the mass of a fragment from M.  More specifically, your spectrum has an unusual feature.  I am only familiar with two functional groups that often display this feature (there might be others).  Identifying likely functional groups might cut the territory down.

[xshadow]

Here are some thoughts.  You can sometimes apply the rule of 12 and the nitrogen rule to good effect.  Try subtracting the mass of a fragment from M.  More specifically, your spectrum has an unusual feature.  I am only familiar with two functional groups that often display this feature (there might be others).  Identifying likely functional groups might cut the territory down.

Hi Babcock !!

Usually the -1 loss with an high peak is an aldehyde...

But I also see a -18 loss (water) that I think is typical of alcahol and carboxylic acid (perhaps COOH gives -17 not 18)....I also see a -28 loss so there sould be a C=O!
Also I see a 76 instad a 77...can it mean that the ring has two substituents?   maybe an aldehyde and an alcohol??

PS: I also see that when I loss the aldehydic group (29) I get 93, that should be phenyl + alcohol.

THANKS

PS: what do you mean with  nitrogen rule? That if M+* is even I don't have nitroger or at least 2N/4N ecc ??

[Babcock_Hall]

Other functional groups with a substantial M-1 are alkynes and some amines and alcohols.  I would subtract the mass of the heteroatom(s) and apply the rule of 12.

When there are an odd number of nitrogens, the value of M is a odd number.