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Gmelin Database
The GMELIN DATABASE is a large database of organometallic and inorganic compounds updated quarterly. It is based on the German publication GMELINS HANDBUCH DER ANORGANISCHEN CHEMIE ("Gmelin's handbook of inorganic chemistry") which was originally published by Leopold Gmelin in 1817; the last print edition, the 8th, appeared in the 1990s. The database currently contains every compound/reaction discovered between 1772 and 1995, amounting to 1.5 million compounds and 1.3 million different reactions, with over 85,000 titles, keywords and abstracts. It has over 800 different data fields on subjects such as the compounds electric, magnetic, thermal, crystal and physiological information. The Gmelin database is maintained by Elsevier MDL . It is the sister database to the Beilstein database , which deals with organic chemicals and reactions; both are now part of the Reaxys system
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Reaxys
REAXYS is a web-based tool for the retrieval of chemistry information and data from published literature, including journals and patents. The information includes chemical compounds, chemical reactions, chemical properties, related bibliographic data, substance data with synthesis planning information, as well as experimental procedures from selected journals and patents. It is licensed by Elsevier
Elsevier
. Reaxys was launched in 2009 as the successor to the CrossFire databases. It was developed to provide research chemists with access to current and historical, relevant, organic, inorganic and organometallic chemistry information, from reliable sources via an easy-to-use interface
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Wikidata
WIKIDATA is a collaboratively edited knowledge base operated by the Wikimedia Foundation . It is intended to provide a common source of data which can be used by Wikimedia projects such as , and by anyone else, under a public domain licence. This is similar to the way Wikimedia Commons
Wikimedia Commons
provides storage for media files and access to those files for all Wikimedia projects, and which are also freely available for reuse. Wikidata
Wikidata
is powered by the software Wikibase . CONTENTS * 1 Concepts * 2 Development history * 2.1 Phase 1 * 2.2 Phase 2 * 2.3 Phase 3 * 3 Reception * 4 Logo * 5 See also * 6 References * 7 Further reading * 8 External links CONCEPTS Screenshots Three statements from Wikidata\'s item on the planet Mars. Values include links to other items and to Wikimedia Commons
Wikimedia Commons

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Special
SPECIAL or SPECIALS may refer to: CONTENTS * 1 Music * 2 Film and television * 3 Other uses * 4 See also MUSIC * Special (album) , a 1992 album by Vesta Williams * "Special" (Garbage song) , 1998 * "Special" (Mew song) , 2005 * "Special" (Stephen Lynch song) , 2000 * The Specials
The Specials
, a British band * "Special", a song by Violent Femmes on The Blind Leading the Naked * "Special", a song on
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Chemical Database
A CHEMICAL DATABASE is a database specifically designed to store chemical information . This information is about chemical and crystal structures , spectra, reactions and syntheses, and thermophysical data. CONTENTS* 1 Types of chemical databases * 1.1 Chemical structures * 1.2 Literature database * 1.3 Crystallographic database * 1.4 NMR spectra database * 1.5 Reactions database * 1.6 Thermophysical database * 2 Chemical structure representation * 3 Search * 3.1 Substructure * 3.2 Conformation * 4 Descriptors * 5 Similarity * 6 Registration systems * 7 Tools * 8 See also * 9 References TYPES OF CHEMICAL DATABASESCHEMICAL STRUCTURESChemical structures are traditionally represented using lines indicating chemical bonds between atoms and drawn on paper (2D structural formulae )
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Elsevier MDL
MDL INFORMATION SYSTEMS, Inc. was a provider of R&D informatics products for the life sciences and chemicals industries. The company was launched as a computer-aided drug design firm (originally named Molecular Design Limited, Inc.) in January 1978 in Hayward, California. The company was acquired by Symyx Technologies , Inc. in 2007. Subsequently Accelrys
Accelrys
merged with Symyx. The Accelrys
Accelrys
name was retained for the combined company. In 2014 Accelrys
Accelrys
was acquired by Dassault Systemes . The Accelrys
Accelrys
business unit was renamed BioVia . CONTENTS * 1 History * 2 Innovations * 3 See also * 4 References * 5 External links HISTORYMolecular Design Limited, Inc. was founded by Stuart Marson and W. Todd Wipke in 1978
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Organometallic Chemistry
ORGANOMETALLIC CHEMISTRY is the study of chemical compounds containing at least one chemical bond between a carbon atom of an organic compound and a metal , including alkaline, alkaline earth, transition metal, and other cases. Moreover, some related compounds such as transition metal hydrides and metal phosphine complexes are often included in discussions of organometallic compounds. The field of organometallic chemistry combines aspects of traditional inorganic and organic chemistry . Organometallic compounds are widely used both stoichiometrically in research and industrial chemical reactions, as well as in the role of catalysts to increase the rates of such reactions (e.g., as in uses of homogeneous catalysis ), where target molecules include polymers, pharmaceuticals, and many other types of practical products
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Inorganic Chemistry
INORGANIC CHEMISTRY deals with the synthesis and behavior of inorganic and organometallic compounds. This field covers all chemical compounds except the myriad organic compounds (carbon based compounds, usually containing C-H bonds), which are the subjects of organic chemistry . The distinction between the two disciplines is far from absolute, as there is much overlap in the subdiscipline of organometallic chemistry . It has applications in every aspect of the chemical industry, including catalysis , materials science , pigments , surfactants , coatings , medications , fuels , and agriculture
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Beilstein Database
The BEILSTEIN DATABASE is the largest database in the field of organic chemistry , in which compounds are uniquely identified by their Beilstein Registry Number . The database covers the scientific literature from 1771 to the present and contains experimentally validated information on millions of chemical reactions and substances from original scientific publications . The electronic database was created from Beilstein's Handbook of Organic Chemistry, founded by Friedrich Konrad Beilstein in 1881, but has appeared online under a number of different names, including Crossfire Beilstein. Since 2009, the content has been maintained and distributed by Elsevier Information Systems in Frankfurt under the product name " Reaxys ". The database contains information on reactions, substances, structures and properties
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Leopold Gmelin
LEOPOLD GMELIN (2 August 1788 – 13 April 1853) was a German chemist . Gmelin was professor at the University of Heidelberg
Heidelberg
among other things, he worked on the red prussiate and created Gmelin\'s test . Gmelin and his wife, portraits by Jakob Schlesinger , 1820 German postal stamp featuring Gmelin CONTENTS * 1 Life * 2 Work * 3 Literature * 4 External links LIFEGmelin was a son of the physician, botanist and chemist Johann Friedrich Gmelin and his wife Rosine Schott. Due to his family he early came in contact with medicine and the natural sciences, in 1804 he attended the chemical lectures of his father. In the same year Gmelin moved to Tübingen to work in the family pharmacy, he also studied at the University of Tübingen
University of Tübingen
among other relatives like Ferdinand Gottlieb Gmelin ( a cousin ) and Carl Friedrich Kielmeyer ( husband of a cousin )
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Gmelin Database
The GMELIN DATABASE is a large database of organometallic and inorganic compounds updated quarterly. It is based on the German publication GMELINS HANDBUCH DER ANORGANISCHEN CHEMIE ("Gmelin's handbook of inorganic chemistry") which was originally published by Leopold Gmelin in 1817; the last print edition, the 8th, appeared in the 1990s. The database currently contains every compound/reaction discovered between 1772 and 1995, amounting to 1.5 million compounds and 1.3 million different reactions, with over 85,000 titles, keywords and abstracts. It has over 800 different data fields on subjects such as the compounds electric, magnetic, thermal, crystal and physiological information. The Gmelin database is maintained by Elsevier MDL . It is the sister database to the Beilstein database , which deals with organic chemicals and reactions; both are now part of the Reaxys system
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