SciFinder provides access to the entire Chemical Abstracts database, indexing nearly 9,500 journals from 1907-present, technical reports, books, conference proceedings, dissertations, as well as patents from 50 active patent issuing authorities around the world.) First time users must register using this link.
Reaxys is a web access to comprehensive information of organic, inorganic, and organometallic compounds, their syntheses and properties that includes Crossfire Beilstein and Gmelin databases.
A multidisciplinary database, with searchable author abstracts, covering the literature of the sciences, social sciences and the arts & humanities providing indexes and links to cited references for each article.
Provides access to the world's repository of small molecule crystal structures. It also gives comprehensive and retrospective coverage of the published literature.
An online book series in organic chemistry covering all volumes from 1964-1995.
If you need: the latest chemistry
ChemRxiv ("chem archive") is a preprint server in chemistry and related chemical sciences. ChemRxiv is co-owned by five of the largest chemistry academic societies - the American Chemical Society (ACS), Chinese Chemical Society, Chemical Society of Japan, German Chemical Society (GDCh), and the Royal Society of Chemistry. The manuscript published on ChemRxiv are not peer reviewed.
engrXiv ("engineering archive") is dedicated to the dissemination of engineering research. engrXiv was launched by University of Wisconsin-Stout, and in partnership with the Center for Open Science. The manuscript published on engrXiv are not peer reviewed.
arXiv ("archive") is an open-access archive for 1,732,878 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. The manuscript published on arXiv are not peer reviewed.