[kerry3788]

does anyone know of any good websites that show you how to interpret the spectrum of the above?
I cant find any really...

[EierVonSatan]

As KBr is IR inactive it won't effect the spectrum - it's just a normal IR spectrum

Here is a basic list of the frequencies/functional groups.

[kerry3788]

thanks
im avin rite fun n games with this...
im currently tryin 2 identify mass spectrum peaks.
any ideas as to what the following peaks could be?
45m/z
64
66
81
109
120
138
141?
im avin 2 do mass spec, ir, 13c 1h etc... im goin mad

[Kyle_S-C]

What's the compound meant to be? Or don't you know?

[kerry3788]

the formula for the compund is C6 H4 OH COOH. Is that salicyclic acid or something?

[shengoc]

Definitely a phenol with a carboxylic acid. It could most likely be salicylic acid where the OH and COOH are ortho to each other. But you can't know this for sure from mass spec or IR alone - have to use NMR.

[kerry3788]

its the mass spec im struglin wiv realy. cant say i like analysin all the sticks! lol

[charco]

(Original post by kerry3788)
its the mass spec im struglin wiv realy. cant say i like analysin all the sticks! lol

138 is the molecular ion so the peak at 141 must be due to isotopes (maybe ¹⁸O, and/or ¹³C etc)

Look at the m/e 45

now count up [COOH]⁺

coincidence?

Maybe you can take it from there...

[kerry3788]

i thought th 81 may be hbr or something, 45 = cooh , but theres all the rest, and i dont get it.... considering weve been given the formula (which i thouhgt was salicyclic acid), do all the peaks need analysin, if so, what r they? im sooo confused...