Acta Cryst. (2004). E60, o1847-o1848  [ doi:10.1107/S1600536804022688 ]

Redetermination of trans-2,5,7,10-tetraazabicyclo[4.4.0]decane

I. Sänger, H.-W. Lerner and M. Bolte

Abstract: The structure of the title compound, C₆H₁₄N₄, has previously been determined at room temperature by Böttcher, Buchkremer-Hermanns, Hönle & von Schnering [Z. Kristallogr. (1987), 181, 223-226], who found only one position for the amine H atom. We report here the low-temperature structure of the title compound, showing that the amine H atom is disordered over two positions. This H atom must be located either in the equatorial or in the axial position so that N-HN hydrogen bonds can be formed. A mirror plane contains the bond that the two rings have in common and a twofold rotation axis runs through the mid-points of all three C-C bonds.

Online 25 September 2004

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