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diastereotopic

Constitutionally equivalent atoms or groups of a molecule which are not symmetry related. Replacement of one of two diastereotopic atoms or groups results in the formation of one of a pair of diastereoisomers. In the example below the two hydrogen atoms of the methylene group C-3 are diastereotopic.
D01685
Source:
PAC, 1996, 68, 2193 (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2206
InChI=1/C4H10O/c1-3-4(2)5/h4-5H,3H2,1-2H3
InChI=1/C4H9FO/c1-3(5)4(2)6/h3-4,6H,1-2H3
InChI=1/C4H9FO/c1-3(5)4(2)6/h3-4,6H,1-2H3
BTANRVKWQNVYAZ-UHFFFAOYAZ
KUOMEPXVIPTJJX-UHFFFAOYAJ
KUOMEPXVIPTJJX-UHFFFAOYAJ
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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). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.D01685.
Original PDF version: http://www.iupac.org/goldbook/D01685.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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