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1,4-Bis(2-diazo-acet-yl)piperazine. 2013

Asmund Kaupang, and Carl Henrik Görbitz, and Tore Bonge-Hansen
Department of Chemistry, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.

The asymmetric unit of the title compound, C8H10N6O2, contains one-half mol-ecule, which is completed by a crystallographic center of symmetry. The piperazine ring adopts a chair conformation. In the crystal, weak C-H⋯O inter-actions link the mol-ecules into layers parallel to the bc plane. The crystal packing also exhibits short N⋯N contacts of 3.0467 (16) Å between the terminal diazo N atoms from neighbouring mol-ecules.

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