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A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC).
In chemical nomenclature, the IUPAC nomenclature of inorganic chemistry is a systematic method of naming inorganic chemical compounds, as recommended by the International Union of Pure and Applied Chemistry (IUPAC). It is published in Nomenclature of Inorganic Chemistry. Ideally, every inorganic compound should have a name from which an unambiguous formula can be determined. There is also an IUPAC nomenclature of organic chemistry.
Mostafa A. El-Sayed is an Egyptian-American physical chemist, a leading nanoscience researcher, a member of the National Academy of Sciences and a US National Medal of Science laureate. He was the editor-in-chief of the Journal of Physical Chemistry during a critical period of growth. He is also known for the spectroscopy rule named after him, the El-Sayed rule.
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2. It is the anion of nitronic acid (sometimes also called an aci, or an azinic acid), a tautomeric form of a nitro compound. Just as ketones and aldehydes can exist in equilibrium with their enol tautomer, nitro compounds exist in equilibrium with their nitronate tautomer under basic conditions. In practice they are formed by the deprotonation of the α-carbon, the pka of which is typically around 17.
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In chemistry, a ring is an ambiguous term referring either to a simple cycle of atoms and bonds in a molecule or to a connected set of atoms and bonds in which every atom and bond is a member of a cycle. A ring system that is a simple cycle is called a monocycle or simple ring, and one that is not a simple cycle is called a polycycle or polycyclic ring system. A simple ring contains the same number of sigma bonds as atoms, and a polycyclic ring system contains more sigma bonds than atoms.
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The International Union of Pure and Applied Chemistry (IUPAC) publishes many books which contain its complete list of definitions. The definitions are divided initially into seven IUPC Colour Books: Gold, Green, Blue, Purple, Orange, White, and Red. There is also an eighth book, the "Silver Book".
The Compendium of Macromolecular Nomenclature, by the International Union of Pure and Applied Chemistry (IUPAC), provides definition of polymer related terms and rules of nomenclature of polymers. It is referred to as the Purple Book. It was published in 1991 (ISBN 0-63202-8475) by Blackwell Science. The author of this book is W.V. Metanomski.
A ring forming reaction or ring-closing reaction in organic chemistry is a general term for a variety of reactions that introduce one or more rings into a molecule. A heterocycle forming reaction is such a reaction that introduces a new heterocycle. Important classes of ring forming reactions include annulations and cycloadditions.
In chemical nomenclature, a descriptor is a notational prefix placed before the systematic substance name, which describes the configuration or the stereochemistry of the molecule. Some listed descriptors are only of historical interest and should not be used in publications anymore as they do not correspond with the modern recommendations of the IUPAC. Stereodescriptors are often used in combination with locants to clearly identify a chemical structure unambiguously.
References
- 1 2 3 4 5 Albery, W. J. (1987). "Victor Gold. 29 June 1922-29 September 1985". Biographical Memoirs of Fellows of the Royal Society . 33: 262–288. doi:10.1098/rsbm.1987.0010. JSTOR 769953. S2CID 73043269.
- ↑ Carsten Reinhardt (2001), Chemical sciences in the 20th century , page 20. Wiley-VCH, ISBN 3-527-30271-9, ISBN 978-3-527-30271-0
- ↑ "UCL Aberystwyth Prospectus, 1942". Collecting: Knowledge in Motion. Retrieved 5 May 2020.
- ↑ ‘GOLD, Prof. Victor’, Who Was Who, A & C Black, an imprint of Bloomsbury Publishing plc, 1920–2016
- 1 2 Colin Archibald Russell and Gerrylynn K. Roberts (2005) Chemical history: reviews of the recent literature, Royal Society of Chemistry, ISBN 0-85404-464-7, ISBN 978-0-85404-464-1
- ↑ Advances in Physical Organic Chemistry , Google Books website
- ↑ IUPAC Compendium of Chemical Terminology, International Union of Pure and Applied Chemistry
- ↑ From the Editor, Chemistry International, Vol. 28 No. 6, November–December 2006
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