Term: heteroconjugation
https://doi.org/10.1351/goldbook.H02796

Definition:
[obsolete] Association between a base and the conjugate acid of a different base through a hydrogen bond (B' … HB+ or A'H … A−). The term has its origin in the conjugate acid–base pair and is in no way related to conjugated systems of orbitals. Heteroassociation is a more appropriate term.

Related Terms:
1) association (http://doi.org/10.1351/goldbook.A00472).
2) conjugation (http://doi.org/10.1351/goldbook.C01267).
3) hydrogen bond (http://doi.org/10.1351/goldbook.H02899).
4) conjugate acid–base pair (http://doi.org/10.1351/goldbook.C01266).
5) orbitals (http://doi.org/10.1351/goldbook.O04317).

Source: 

Citation: 'heteroconjugation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.H02796

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