Illustrated Glossary of Organic Chemistry

Triplet of doublets:  In NMR spectroscopy, a signal that has been split into a triplet, and each line of this triplet split into a doublet. Occurs when coupling constants are unequal.


Idealized triplet of doublets.
   



A triplet of doublets occurs when Jbc > Jba.

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