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SciFinder-n is a comprehensive database for coverage of chemistry and chemical engineering. It has the world's largest collection of organic and inorganic substance information. It provides integrated access to CAPlus, CAS registry, CASREACT, CHEMLIST, and CHEMCATS, which are produced by Chemical Abstracts Service; and to MEDLINE, which is produced by the U.S. National Library of Medicine.
As in its earlier interation titled SciFinder, sources covered include over 10,000 journals, patents from over 60 patent authorities, book chapters, conference proceedings, dissertations, evaluated reference works, technical reports, as well as book reviews and biographical information. 15 million PatentPak PDFs are included, as well as 5 million synthetic protocols. SciFindern̳ provides researchers with improved searching functionality and additional tools to analyze and manipulate retrieved data sets
Reaxys provides information about millions of chemical structures, reactions, and properties. It is an important tool for researchers who are synthesizing and characterizing chemical compounds, or searching for data on the physical, chemical, spectral, or toxicological properties of chemical substances.
You don't have to create an account to use Reaxys, but if you do create an account you can save searches, and access other additional features. To create an account or login, click the "Register" or "Login" links at the top right of the Reaxys home screen.
This is a free site organized by National Institute of Advanced Industrial Science and Technology (AIST) of Japan. It includes 6 different types of spectra under a directory of the compounds: an electron impact Mass spectrum (EI-MS), a Fourier transform infrared spectrum (FT-IR), a 1H nuclear magnetic resonance (NMR) spectrum, a 13C NMR spectrum, a laser Raman spectrum, and an electron spin resonance (ESR) spectrum.