stereoheterotopic

https://doi.org/10.1351/goldbook.S05981
Either @E02083@ or @D01685@. (In contrast the term constitutionally @H02815@ has been used to describe identical groups located in constitutionally non-equivalent positions).
See also:
pro-R, pro-S
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2219 [Terms] [Paper]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.
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Last revised: February 24, 2014