Results are out! Find what you Get quick advice or join the chat

Unlock these great extras with your FREE membership

  • One-on-one advice about results day and Clearing
  • Free access to our personal statement wizard
  • Customise TSR to suit how you want to use it

FT-IR Spectrum (KBr disc)

Announcements Posted on
Find your uni forum to get talking to other applicants, existing students and your future course-mates 27-07-2015
Win top prizes in our mega results day giveaway... 24-07-2015
  1. Offline

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

    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.
  3. Offline

    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?
    im avin 2 do mass spec, ir, 13c 1h etc... im goin mad
  4. Offline

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

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

    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.
  7. Offline

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

    (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]+


    Maybe you can take it from there...
  9. Offline

    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...


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: December 16, 2009
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Would you consider Clearing if you missed your offer?
Results and Clearing

Results are coming...

No sweat. Here's all you need to make sure you're ready

new on tsr

What's your life ambition?

Graduating, travelling, owning a business?

Study resources

Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.