Everything you need to read spectra and determine structures: IR, ¹H and ¹³C NMR, and mass-spec reference tables, a degrees-of-unsaturation calculator, and worked walkthroughs.
IR absorption, NMR chemical-shift, and MS fragment reference tables
Degrees-of-unsaturation (DBE) calculator
Worked structure-determination walkthroughs
Cross-linked to functional groups and the spectroscopy how-to guides