Chemistry: Subject websites

• WebElements aims to be a high quality source of information on the WWW relating to the periodic table. Maintained by Mark Winter at the University of Sheffield.
• The Center for Molecular Modeling is a major supplier of molecular modeling resources and expertise to the NIH (National Institutes of Health) research community. It provides a well organised set of resources relating to molecular modeling.
• NMR Information Server provides links relating to Nuclear Magnetic Resonance.
• The Chemical MIME Home Page provides a concise entry point for various information sources relating to chemical MIME (Multipurpose Internet Mail Extension). Maintained by Henry Rzepa of Imperial College, London.

• Pinakes provides links to a wide range of major Internet subject gateways.

• Intute Resources in Chemistry provides a select list of the 'best of the Web' for chemistry.
• Chemdex.org is an international directory of chemistry on the Internet which organises resources by subject and category. Maintained by the Department of Chemistry at the University of Sheffield.
• LearnNet is maintained by the Royal Society of Chemistry and provides a wide range of teaching, learning and other resources for students and teachers of chemistry.
• Links for Chemists is maintained by the University of Liverpool and is an index of chemistry resources on the Web.
• World Wide Web Virtual Library: Links for Chemists is an index of chemistry resources on the web. Copyright of The University of Liverpool, Department of Chemistry.
• Crystallography Online aims to provide extensive coverage of current and Internet-based information concerning crystallography and of interest to crystallographers. Maintained by the International Union of Crystallography.

• Chemspider is a free access web-based service providing a structure centric community for chemists. Providing access to millions of chemical structures and integration to a wide range of other online services ChemSpider is a rich source of structure-based chemistry information.
• eMolecules is the world's most comprehensive openly accessible search engine for chemical structures. It comprises:
  • a database of 8 million unique chemical structures from 22 million sources.
  • chemical data from over 150 suppliers, with standard weekly or quarterly updates as necessary.
  • the ability to search by drawing chemical structures or substructures using standard industry tools - ISIS/Draw, ChemDraw, ChemSketch and JME.
  • over 4 million commercially available screening compounds.

• What every chemist should know about patents is an introduction to US patent law, produced by the American Chemical Society.

A useful printed guide is Patent Handbook: a guide for inventors and researchers to searching patent documents and preparing and making an application by F K Carr (Joule Library: 608.73 CAR).

Below is a selection of chemical drawing/modelling freeware:

• ACD/ChemSketch 11.0 Freeware is a substantial freely downloadable chemical drawing package.
• Chemist's Art Gallery is developed and maintained by CSC (Finland) and supports quantum chemistry, molecular dynamics applications using sketcher/builder and visualisation tools.
• Drawing Chemical Structures with PLT is freeware for drawing chemical structures and creating hard copy on printers and other Windows supported output devices.
• Jmol is an open-source Java viewer for chemical structures in 3D, with features for chemicals, crystals, materials and biomolecules.
• RasMol (Protein Explorer) is a molecular visulaisation freeware for looking at macromolecular structure and its related function.

• Scholarly Societies Project: Chemistry facilitates access to web sites of scholarly societies relevant to chemistry.

• Classic Organic Reactions is an alphabetical list of classic organic named reactions with full depiction of the reaction and key references.
• Name Reaction List is an alphabetic list of named reactions with full depiction of the reaction and the original reference.
• Name Reactions in Organic Chemistry is maintained by the Organic Chemistry Portal. Reaction mechanisms, detailed descriptions and references accompany most of the reactions listed.

• Acronyms Database is a searchable database of chemical acronyms and abbreviations developed and maintained by the Chemistry Library at Indiana University.
• ChemIDplus is a chemical dictionary and structure database created and maintained by the National Library of Medicine (NLM). Chemicals can be searched by name, registry number, synonym and formula.
• Chemindex Database is a searchable online database of chemicals and corresponding suppliers that includes registry numbers, chemical names, and synonyms.
• Chemindustry Chemical Name Synonyms Finder is a keyword searchable database that allows search by full chemical name, partial chemical name, registry number or molecular formula.
• IUPAC Compendium of Chemical Terminology comprises over 7,000 terms. All terminology definitions published by IUPAC are drafted by international committees of experts in the appropriate chemistry sub-disciplines.
• IUPAC Nomenclature of Organic Chemistry includes a useful guide to the principles of organic nomenclature.