Warning (2): get_headers(): https:// wrapper is disabled in the server configuration by allow_url_fopen=0 [APP/Controller/TermsController.php, line 315]
Warning (2): get_headers() [<a href='http://php.net/function.get-headers'>function.get-headers</a>]: This function may only be used against URLs [APP/Controller/TermsController.php, line 315]
IUPAC - in-out isomerism (I03055)

in-out isomerism

https://doi.org/10.1351/goldbook.I03055
@I03294@ found in bicyclic systems having long enough bridges to allow the @B00736@ exocyclic bond or lone pair of electrons to point either inside the structure or outside.
I03055-1.png
I03055-2.png
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2210 [Terms] [Paper]