An Unexpected Zinc Coordination Polymer formed during the Preparation of 5-Substituted 1 H -Tetrazoles from a Nitrile in Water

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Abstract
The reaction of N , N ´-dicyanohydrazine with ZnCl2 and NaN3 in water unexpectedly affords 5-aminotetrazolato hydroxo zinc rather than a zinc complex with bis(tetrazolyl)hydrazine. An N–N bond cleavage has occurred in the Demko–Sharpless' tetrazole synthesis.