 | Acta Crystallographica Section E Acta Crystallographica Section E CRYSTALLOGRAPHIC COMMUNICATIONS |
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![[Figure 2]](lh5858fig2mag.jpg)
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Figure 2
(a) The two independent molecules of 2,5-diazabicyclo[2.2.1]heptane in the crystal structure of 1 (this work). (b) The chair conformer of piperazine in piperazine-1,4-diium dibromide monohydrate (Bujak, 2015  ). The atomic numbering schemes are given in IUPAC notation. Symmetrically equivalent atoms in the piperazine ring are noted in parentheses. Displacement ellipsoids are drawn at the 30% probability level. Hydrogen atoms, bromide counter-ions and water molecules have been omitted for clarity. |
![[Figure 2]](lh5858fig2.jpg)
| CRYSTALLOGRAPHIC COMMUNICATIONS |
ISSN: 2056-9890
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