Abstract
The gamma radiolysis of crystalline 2,4,6-triazido-3,5-dichloropyridine (TACP) was studied by the EPR method. The molecular and crystal structure of TACP was determined by X-ray structure analysis. The prolonged radiolysis of TACP at 77 K caused the appearance of characteristic EPR signals of quintet 2,6-dinitreno-4-azido-3,5-dichloropyridine (2,6-DN) and 2,4-dinitreno-6-azido-3,5-dichloropyridine (2,4-DN). The predominant decomposition of the α-azide groups of TACP was explained by the special features of its molecular and crystal structure. The saturation of the EPR signals of quintet 2,6-DN and 2,4-DN and one-electron radicals with S = 1/2 as the microwave field power increased was studied. The quintet dinitrenes were found to be thermally unstable; they remained in TACP crystals up to 245–250 K.
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