Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Experimental data for C₄H₂O₃ (Maleic Anhydride)

Vibrational levels (cm^-1)

Mode Number	Symmetry	Frequency			Intensity			Comment	Description
		Fundamental(cm-1)	Harmonic(cm-1)	Reference	(km mol-1)	unc.	Reference

vibrational zero-point energy:   cm^-1 (from fundamental vibrations)
Calculated vibrational frequencies for C₄H₂O₃ (Maleic Anhydride).

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