Provisional Recommendations

doi:10.1515/ci.2012.34.1.25

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Provisional Recommendations

Published/Copyright: January 1, 2012

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From the journal Chemistry International -- Newsmagazine for IUPAC Volume 34 Issue 1

Provisional Recommendations

www.iupac.org/reports/provisional

Terminology and Nomenclature for Macromolecular Rotaxanes and Pseudorotaxanes

This document provides definitions of terms related to macromolecular rotaxanes and macromolecular pseudorotaxanes, and recommendations for naming these macromolecular assemblies. The nomenclature recommendations presented here have been developed by combining the nomenclature rules for the low-molecular-weight rotaxanes and the nomenclature rules for macromolecules (both established in published IUPAC Recommendations) in such a way that the developed nomenclature system provides unambiguous names for macromolecular rotaxanes (pseudorotaxanes) including differentiation among various isomers of these supramolecular assemblies. Application of the nomenclature recommendations is illustrated using examples covering a wide range of structure types of macromolecular rotaxanes and pseudorotaxanes. An alphabetical index of terms and a list of abbreviations and prefixes are included.

Comments by 31 March 2012

Jirí Vohlídal

Faculty of Natural Science, Hlavova 2030, Praha CZ-12840, Czech Republic

E-mail: vohlidal@natur.cuni.cz or j.vohlidal@centrum.cz

http://media.iupac.org/reports/provisional/abstract11/vohlidal_310312.html

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Provisional Recommendations

www.iupac.org/reports/provisional

Name and Symbol of the Element with Atomic Number 114 and 116

A joint IUPAC/IUPAP Working Party (JWP) has confirmed the discovery of the elements with atomic numbers 114 and 116. In accord with IUPAC procedures, the discoverers proposed names as follows: flerovium and symbol, Fl, for the element with Z = 114 and livermorium with the symbol Lv for the element with Z = 116. The Inorganic Chemistry Division recommended these proposals for acceptance.

For element with atomic number 114, the proposal lies within tradition and honours the Flerov Laboratory of Nuclear Reactions where superheavy elements are synthesised. Georgiy N. Flerov (1913–1990) was a renowned physicist, author of the discovery of the spontaneous fission of uranium (1940, with Konstantin A. Petrzhak), pioneer in heavy-ion physics; and founder in the Joint Institute for Nuclear Research the Laboratory of Nuclear Reactions (1957).

For the element with atomic number 116, the proposed name livermorium is again in line with tradition and honours the Lawrence Livermore National Laboratory. A group of researchers of this Laboratory with the heavy element research group of the Flerov Laboratory of Nuclear Reactions took part in the work carried out in Dubna on the synthesis of superheavy elements including element 116.

Comments by 30 April 2012

John Corish

University of Dublin, Chemistry Department, Trinity College, Dublin 2, Ireland

Tel: +353 (1) 896 1776

E-mail: jcorish@tcd.ie

http://media.iupac.org/reports/provisional/abstract11/corish_300412.html

Page last modified 5 January 2012.

Questions regarding the website, please contact edit.ci@iupac.org

Published Online: 2012-01-01

Published in Print: 2012-01

Articles in the same Issue

https://doi.org/10.1515/ci.2012.34.1.25