Checklists
MS Checklist
- Look for \(M^+\) (though you might not find it)
- Look for isotope pattersn
- Look for obvious fragments
- Heavy elements
- Aromatic rings - Ph at 77, Toluene at 91
- Hydrocarbon fragments - \(\ce{xCH3}\) at \(x15\)
- If they’re big peaks try and identify them
- Is \(M^+\) odd or even (nitrogen rule)
- Degree of unsaturation
FTIR Checklist
- Look for functionality in the molecule
- Look for specific bond types - \(\ce{OH}\), \(\ce{NH}\), \(\ce{CH}\), \(\ce{C=O}\), \(\ce{C#C}\) etc.
- What type of \(\ce{C=O}\) is it (use tables)
- Don’t dwell too much
\(\cnmr\) Checklist
- Is it coupled or decoupled
- What solvent is it in, can you see the solvent peak?
- How many \(\ce{^13C}\) environments are there?
- Are there any characteristic shifts - e.g. \(\ce{C=O}\:\alpha\) carbon
\(\hnmr\) Checklist
- What solvent is it in, can you see the solvent peak?
- How many peaks are there?
- What are the splitting patterns?
- What are the peak areas?
- Where are the peaks? Is there obvious functionality?