EMS Chemistry

IR and Mass Spec Webquest

This webquest will replace the traditional 'end of topic test' for the Modern Analytical Techniques topic.

Task

Below are four displayed formulae of different organic molecules.  Match each one with its IR spectrum and Mass Spectrum.  These can also be found below, and are in no particular order.  Explain how the IR Spectra and Mass Spectra may be deduced.  Ensure that all relevant peaks or absorptions are labeled or discussed, including the M+ peak on the Mass Spectra.  Try to identify fragment ions where possible.

You must present your answer as a page on your website.  

Grading criteria

• A - The candidate has identified all the IR spectra and Mass spectra correctly and matched them to the correct displayed formula and name of the molecule.  The candidate has explained their answer in detail by identifying all relevant peaks, stated absorption wavenumbers and has given m/z ratios  for each molecule's fragment ions, showing how these clearly relate to the displayed formula of the molecule.
• B - The candidate has identified all the IR spectra and Mass spectra correctly and matched them to the correct displayed formula and name of the molecule.  The candidate has explained their answer by identifying the most relevant peaks, stated absorption wavenumbers and has given m/z ratios  for some of each molecule's fragment ions, showing how these clearly relate to the displayed formula of the molecule.
• C - The candidate has identified all the IR spectra and Mass spectra correctly and matched them to the correct displayed formula and name of the molecule.  The candidate has attempted a simple explanation of their answer by identifying C=O, C-O and O-H peaks, and has labeled some m/z ratios with an attempt at showing at least one fragment ion for each molecule.
• D - The candidate has identified most of the IR spectra and Mass spectra correcty and matched them to the correct displayed formula and name of the molecule.  The candidate has attempted a simple explanation of their answer by identifying C=O, C-O and O-H peaks, and has labeled the M+ peak for each molecule, stating the Mr clearly.
• E - The candidate has attempted to identify the major absorptions and M+ peaks for each molecule and has attempted to match these to the correct molecule, with limited success.
• U - No work submitted, or work submitted after the deadline.
  

Rules: 

• The deadline for this is Wednesday 14th March.
• You may use these images on your website; just right click and save them, then upload them to your site using the Picture widget.
• You can use the Text widget to explain your answer in detail - remember to use good spelling, punctuation and grammar!
  
• You may use different multimedia techniques to demonstrate your answer e.g. you may like to make a short presentation using Moviemaker or PowerPoint.  These can be uploaded to your website using the File widget or embedded using the HTML widget.
• If you want to host a movie file online, try Photobucket - a free image and video hosting site.
• Any problems - email me or see me after school or at lunchtime.
• If, for whatever reason, you cannot complete this task online, present your answer as a Word document and bring it in on a memory stick.  If this isn't possible, print it out.  If all else fails, hand write your answer.  No excuses!
• There will be small prizes for those students who make the effort to present their work in a clear, informative and innovative manner on their website.  Good luck!