Due to easy decomposition, trinitroaceto-nitrile should be handled with utmost care, and kept insolution. Tetrazole-tetrazoline (1,4-dihydrotetrazole) tautomerismwas readily observed, in addition to two tautomeric forms of1-H and 2-H tetrazole rings. When -OH and -SH weresubstituted at C-5, tetrazoline forms were predominant.
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Choong Hwan Lim (2008) studied this question.
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