Illustrated Glossary of Organic Chemistry

Triplet: In NMR spectroscopy, a split signal composed of three lines, close together. The height of the lines will be close to a 1:2:1 ratio.




Idealized triplet
Lines in a 1:2:1 ratio
  
"Leaning" triplet


The simulated 1H-NMR spectrum of 2-ethylphenol has a triplet at 1.2 ppm due to the CH3 group. Click on the image to view a larger version.