Illustrated Glossary of Organic Chemistry

Sextet: In NMR spectroscopy, a split signal composed of six lines, close together. The height of the lines will be close to 1:5:10:10:5:1 ratio.




Idealized sextet
Lines in a 1:5:10:10:5:1 ratio
  
"Leaning" sextet


The simulated 1H-NMR spectrum of sec-butyl ether has a sextet at 3.30 ppm due to the methine protons. Click the image to see a larger version.