science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: squaric acid					Other Names: 3,4-dihydroxy-3-cyclobutene-1,2-dione

Formula: C4H2O4						CAS-No.: 2892-51-5	PubChem: CID 17913

Study: theoretical study on UV absorption spectroscopy, Raman spectroscopy, thermodynamics

                
Authors: F. Colmenero, R. Escribano

Title: Thermodynamic, Raman Spectroscopic, and UV-Visible Optical Characterization of the Deltic, Squaric, and Croconic Cyclic Oxocarbon Acids

Journal/Source: J. Phys. Chem. A, 123 (19), 4241-4261, (2019); DOI: 10.1021/acs.jpca.9b01354


Data: table, diagram

Energy/Wavelength range: 200 - 350 nm

Resolution: 

Temperature: 0 K

Temperature dependence: no

Pressure/Concentration: 

Phase: solid

pH:


Comments: The results are obtained using theoretical solid-state methods employing very demanding calculation parameters.

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