# Checklists¶

## MS Checklist¶

• Look for $$M^+$$ (though you might not find it)
• Look for isotope pattersn
• e.g. Br (1:1), Cl (3:1)
• 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?