Tandem reactions of nitriles with 2-aminoethanethiol hydrochloride or amino alcohols in the presence of a catalytic amount of cupric methacrylate (Cu II 2 L 4 , L = methacrylate) were employed to prepare 2-thiazolines and 2-oxazolines un-

18 unprecedented 3,6-unsymmetrically disubstituted-1,2,4,5-tetrazines were synthesized, and their spectral and electrochemical properties are studied. A systematic theoretical investigation based on DFT calculations was carried out.

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