Chemistry International Blank Image
Chemistry International Text Image Link to Chemistry International Blank Image Chemistry International Blank Image Chemistry International Blank Image
Chemistry International Blank Image
Chemistry International Blank Image
Chemistry International Text Image Link to Current Issue
Chemistry International Text Image Link to Past Issues
Chemistry International Text Image Link to Officer's Columns
Chemistry International Text Image Link to Features
Chemistry International Blank Image
Chemistry International Text Image Link to Up for Discussion
Chemistry International Text Image Link to IUPAC Wire
Chemistry International Text Image Link to Project Place
Chemistry International Text Image Link to imPACt
Chemistry International Text Image Link to Bookworm
Chemistry International Text Image Link to Internet Connections
Chemistry International Text Image Link to Conference Call
Chemistry International Text Image Link to Where 2B and Y
Chemistry International Text Image Link to Symposia
Chemistry International Text Image Link to CI Indexes
Chemistry International Text Image Link to CI Editor
Chemistry International Text Image Link to Search Function
Chemistry International Text Image Link to Information

 

Chemistry International Text Image Link to Previous Issue Chemistry International Text Image Link to Previous Page Chemistry International Text Image Link to This TOC Chemistry International Text Image Link to Next Page Chemistry International Text Image Link to Next Issue

Vol. 26 No. 1
January-February 2004

Up for Discussion | A forum for members and member organizations to share ideas and concerns.
S
end your comments by e-mail to edit.ci@iupac.org

Questionable Stereoformulas of Diastereomers - Response from the IUPAC Chemical Nomenclature and Structure Representation Division (VIII)

Division VIII is well aware of the problem pointed out by Drs. Kaupp and Naimi-Jamal, and will be addressing it in the course of a substantial project on Graphical Representation Standards for Chemical Structure Diagrams currently under consideration. There are published IUPAC recommendations on the depiction of stereoformulae in “Basic Terminology of Stereochemistry” (Pure Appl. Chem., 68, 2193–2222 [1996]) and these will be reviewed and expanded as part of this new project.

The specific problem raised in the letter from Drs. Kaupp and Naimi-Jamal is addressed by some organisations, such as the World Health Organization, drawing the R isomer (i.e., the isomer with the R configuration at the lowest locant if there is more than one centre of chirality) and adding, where relevant, “or enantiomer” or “and enantiomer.” There is a difficulty with the proposal to restrict the use of “thick” and “hatched” bonds to represent relative configurations, in that the reader would have no means of recognizing that this convention was being used.

Alan McNaught <adm@rsc.org> is president of the IUPAC Chemical Nomenclature and Structure Representation Division.

> Click here to read Questionable Stereoformulas of Diastereomers


Page last modified 7 January 2004.
Copyright © 2003-2004 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
Link to CI Home Page Link to IUPAC E-News Link to IUPAC Home Page