Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
A noncovalent interaction between a cation, a positive ion like Li+ or Na+, and an aromatic residue such as benzene, ethylene, acetylene.
Definition source: English Wiktionary via Wiktextract
Usage: physical, uncountable
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From cation + translingual π, where π is from π system. Aromatic residues are called π systems because they contain a lot of π links, links between p electrons.
