Trans-dinitroglycoluril isomers-A DFT treatment

Isomers of trans-1,4-Dinitroglycoluril (trans-DINGU) and their 1,3-tautomers are considered within the constraints of B3LYP/6-31++G (d,p) and B3LYP/CC-PVTZ levels of DFT calculations. Additionally, the interactions of these isomers and proton in vacuum are investigated. The data have revealed that two of the three isomers undergo CH bond cleavage as the result of interaction with proton in vacuum. The total energies, some structural properties, the calculated IR and UV spectra are discussed.