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A polar polymorph of tetrazole is described. α-Tetrazole, CH2N4 is triclinic, (space group P1), with one molecule of the 1H-tautomeric form of tetrazole in the unit cell. The molecules are connected by N-H...N hydrogen bonds forming chains, which are linked together by C-H...N interactions to give planar sheets separated by 3.35 (1) Å. The structure of α-tetrazole is compared with that of monoclinic β-tetrazole; the difference in the two structures is due to the sheet orientation.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablock 2383

fcf

Structure factor file (CIF format)
Contains datablock 2383

CCDC reference: 128628

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