3% Solutions (To Formerly Intractable Problems)

Positions, intensities and widths measured through Fourier transform spectroscopy have often revealed inadequacies in our quantum mechanical models. Analyses of infrared water, hydrogen sulfide, ammonia and methane spectra that have reproduced intensities and widths to within an experimental precision of 3% or better are discussed along with recommendations for future measurements and analyses needed to advance our theoretical understanding of ro-vibrational spectra in the infrared.