Illustrated Glossary of Organic Chemistry - Quartet

Illustrated Glossary of Organic Chemistry

Quartet: In NMR spectroscopy, a split signal composed of four lines, close together. The height of the lines will be close to 1:3:3:1 ratio.


Idealized quartet Lines in a 1:3:3:1 ratio		"Leaning" quartet

The ¹H-NMR spectrum of 2-ethyl phenol has a quartet at 2.5 ppm due to the CH₂ group. Click the image to see a larger version.

Related terms: Spin-spin coupling, first order coupling, non-first-order coupling, splitting, first-order splitting, non-first-order splitting, coupling constant, J, chemical shift, singlet, doublet, triplet, pentet, sextet, septet, multiplet, doublet of doublets, doublet of triplets, triplet of doublets
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