eclipsed (v.), eclipsing (adj.)

https://doi.org/10.1351/goldbook.E01884
Two atoms or groups attached to adjacent atoms are said to be eclipsed if the torsion angle between the three bonds is zero (or approximately so).
See: bisecting conformation, eclipsing strain
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2206 [Terms] [Paper]
Citation: 'eclipsed (v.), eclipsing (adj.)' 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.E01884 RIS BibTex EndNote
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