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  IUPAC Atropisomers is defined as following A subclass of conformers which can be isolated as separate chemical species and which arise from restricted rotation about a single bond, e.g. ortho -substituted biphenyl, 1,1,2,2-tetra- tert -butylethane. The word atropisomer is derived from the Greek a , meaning not , and tropos , meaning turn . The name was coined by Kuhn in 1933, but atropisomerism was first detected in 6,6’-dinitro-2,2’-diphenic acid by Cristie in 1922. References: PAC, 1996, 68, 2193 (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2200 Wiki Article axial chirality

- the Red Book -

Nomenclature of Inorganic Chemistry IUPAC Recommendations 2005 This new edition of the 'Red Book' clarifies and updates recommendations concerning the names and formulae of inorganic compounds and reflects major recent developments in inorganic chemistry. Moreover, it presents recommendations fully consistent with the principles of the nomenclature of organic chemistry. In order to choose the most appropriate of the various nomenclature systems described, a flowchart is provided to guide the reader to a section or chapter where rules can be found for a particular type of compound or species. Copious examples are supplemented by an extensive subject index. Related Posts: Nomenclature    Get Green Book, 2nd Edition for free!!

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Principles of Chemical Nomenclature A Guide to IUPAC Recommendations

This book " Principles of Chemical Nomenclature  A Guide to IUPAC Recommendations" also available from IUPAC as free download Contents Introduction;  Definitions;  Formulae;  Naming of substances;  Aspects of the nomenclature of organometallic compounds; Macromolecular (polymer) nomenclature;  Biochemical nomenclature; Nomenclature in the making; Appendices;  Index full text   pdf 1.70MB , with bookmark by chapters and sections  

Get Green Book, 2nd Edition for free!!

The second edition of  Quantities, Units and Symbols in Physical Chemistry  ( ISBN 0-632-03583-8 ), also known as the  Green Book , establishing standards for nomenclature in chemistry. The green books are direct successors to the "Manual of Symbols and Terminology for Physicochemical Quantities and Units" prepared for publication on behalf of the Physical Chemistry Division of IUPAC by M. L. McGlashen in 1969. A full history of the 'Green Books" is provided in the historical Introduction to the 3rd Edition. The 2nd edition has been available online as a PDF file, and the third edition will be available as a pdf one year after publication. Download  2nd edition  of Green Book. Source:,_Units_and_Symbols_in_Physical_Chemistry

Goldify : create links back to goldbook for any text

Goldify is a service provided by IUPAC . This online service allows you to submit your text and have links to the IUPAC Gold Book automatically inserted into it using the goldify software. Underlined linear structures display the actual structure of the molecule when you put a mouse cursor over them. Visit Goldify here. Insert your text here : clear text entry box Link format : HTML Inline text Results : View online Download in a file Please do not fill this entry: