bridgehead atom

synonym: bridgehead
https://doi.org/10.1351/goldbook.16247
Atom that is part of two or more rings in a polycyclic molecule and that is separated from another bridgehead atom by bridges all of which contain at least one other atom.
Example: \(\ce{C{1}}\) and \(\ce{C{4}}\) in bicyclo[2.2.1]heptane, but not \(\ce{C{4}a}\) and \(\ce{C{8}a}\) in decahydronaphthalene.
Source:
PAC, 2022, 94, 353. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)) on page 374 [Terms] [Paper]
Citation: 'bridgehead atom' 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.16247 RIS BibTex EndNote
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