{"term":{"id":"02392","title":"Fischer–Rosanoff convention","longtitle":"IUPAC Gold Book - Fischer–Rosanoff convention","doi":"10.1351\/goldbook.F02392","code":"F02392","status":"current","mentioned":"<em>mentioned<\/em>: ᴅ, ʟ, ᴅʟ","synonym":"<em>synonym<\/em>: Rosanoff convention","definitions":[{"id":1,"text":"An arbitrary convention according to which (+)-glyceraldehyde, now known to be (R)-2,3-dihydroxypropanal, was named ᴅ-glyceraldehyde (with the enantiomer ʟ-glyceraldehyde and its racemate ᴅʟ-glyceraldehyde) and taken to have the absolute configuration represented by the Fischer projection formula shown in the diagram.  The atom numbered 1 according to normal nomenclature rules is conventionally placed at the top of the main chain, which is drawn vertically and other groups are drawn on either side of that main chain. The convention is still in use for $\\ce{\\upalpha\\!\\mbox{-}amino acids}$ and for sugars.","links":[{"term":"Fischer projection","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/F02391"},{"term":"absolute configuration","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/A00020"},{"term":"enantiomer","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/E02069"},{"term":"racemate","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/R05025"},{"term":"sugars","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/S06088"}],"sources":["PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2208 (https:\/\/doi.org\/10.1351\/pac199668122193)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/F02392\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/F02392\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/F02392\/plain"},"citation":"Citation: 'Fischer–Rosanoff convention' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.F02392","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-07-22T21:18:08+00:00"}}