Reaxys is a web-based search and retrieval system for chemical information, including property data of chemical compounds, bibliographic data and chemical reactions. Interface to and content of the databases of Beilstein (commonly known as Crossfire Beilstein) and Gmelin.
SciFinder contains experimental and/or predicted NMR Spectroscopy, IR Spectroscopy,and MS Spectrometry data. Search by substance, name or substructure.
Search by name, structure, or identifier. Includes IR, NMR, UV/VIS, and MS spectra.
Infrared (IR) Spectra
You can find IR spectroscopy data in the sources included in General Sources, like Reaxys, SciFinder, SDBS, etc. Also, these are some compilations of IR spectra:
The three volume set is located at Mudd Library (Reference area). The compounds are arranged by functionality. Extensive data for organic substances, and also IR spectra of inorganic, organometallic, and polymers.