Illustrated Glossary of Organic Chemistry - Coupling constant

Illustrated Glossary of Organic Chemistry

Coupling constant (J; J value): The energy difference between spin states caused by spin-spin coupling. Also the chemical shift difference between the lines in a split NMR signal due to spin-spin coupling.

This doublet has J = 7 Hz.

Related terms: First-order coupling, first-order splitting, singlet, doublet, triplet, quartet, non-first order coupling, non-first order splitting, doublet of doublets, doublet of triplets, triplet of doublets, joule
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