CAS has added experimental spectra for over 700,000 compounds in the Registry database. IR, MS and NMR spectra are from Wiley spectral databases and the Japanese SDBS database. In addition, CAS has added millions of predicted proton and 13C NMR spectra from ACD Labs and about 75,000 experimental 13C and 1H NMR spectra from BioRad-Sadtler.
Updated daily. Requires users to register with a utexas.edu email account. Provides integrated access to the Chemical Abstracts suite of databases with millions of bibliographic records covering the worldwide chemical literature, including patents; as well as over 100 million substance records, with chemical structures, names, synonyms, and associated property data; plus millions of searchable organic reactions. Search by topic, author, chemical identification terms (names, formulas, Registry Numbers), and chemical structures. For more information, visit the SciFinder guide.
Reaxys includes extensive spectral data for organic and inorganic compounds excerpted from the journal literature. It does not contain graphical spectra diagrams.
Database of millions of organic, inorganic and organometallic compounds and millions of organic reactions drawn from the chemical literature, searchable by structure, substructure, reaction scheme, identification information and property data values.
Contains IR spectra (via interactive applet) for various compounds. The directory can be searched by registry number, molecular formula, chemical name or synonyms in different languages as well as by physical and chemical characteristics and combinations of those data. May also be searched by substructure. The data are submitted from various uncritical sources.
Database containing basic physical and spectral data (but not diagrams) and selected literature references for over 500,000 chemical substances and their derivatives. UV maxima and solvent are searchable via the property field search, but other peaks are not searchable. (ChemnetBase)
Updated semi-annually. Database of over 500,000 organic, inorganic, and organometallic compounds and natural products, with structures, chemical, spectral, and physical data, and selected literature references.
"Curated database of high-resolution tandem mass spectra that are arranged into spectral trees. MS/MS and multi-stage MSn spectra were acquired at various collision energies, precursor m/z, and isolation widths using Collision-induced dissociation (CID) and Higher-energy collisional dissociation (HCD)."
"The Atomic Spectra Database (ASD) contains data for atom and ion transitions, and energy levels. Lines are included for the first 99 elements in the periodic table. The energy level tables also contain ionization limits. ASD contains data on about 950 spectra, with about 144,400 lines from 0.4 to 5,000,000 angstroms in wavelength, plus about 77,000 energy levels."
"Three databases of diatomic, triatomic, and hydrocarbon molecules were originally published as spectral tables in the Journal of Physical and Chemical Reference Data. Each covers primarily the microwave region with some data for the radio frequency region. Rotational spectral lines for 121 diatomic molecules, 55 triatomic molecules, and 91 hydrocarbons have been tabulated. The isotopic molecular species, assigned quantum numbers, observed frequency, estimated measurement uncertainty, and reference are given for each transition."
Version 4.1 provides "access to the energies of many photoelectron and Auger-electron spectral lines. Resulting from a critical evaluation of the published literature, the database contains over 22,000 line positions, chemical shifts, doublet splittings, and energy separations of photoelectron and Auger-electron lines. A highly interactive program allows the user to search by element, line type, line energy, and many other variables. Users can easily identify unknown measured lines by matching to previous measurements."
Database for organic structures and their NMR spectra. It allows for spectrum prediction as well as for searching spectra, structures and other properties. It features peer-reviewed submission of datasets by users. (Univ. of Koeln)