angle strain

https://doi.org/10.1351/goldbook.A00349
@S06037-1@ due to a departure in bond @A00346@ from 'normal' values. The term is often used in the context of non-aromatic cyclic compounds in which the internal angles differ from the regular tetrahedral @A00346@ of $$109^{\,\unicode{x26ac}}\,28^{\prime }$$; in this sense @A00346@ @S06037-2@ is also known as @B00586@.
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2198 [Terms] [Paper]