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Updated: Jun 5, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Three-dimensional network in piper-azine-1,4-diium-picrate-piperazine (1/2/1)
Abstract:
In the title compound, C(4)H(12)N(2) (2+)·2C(6)H(2)N(3)O(7) (-)·C(4)H(10)N(2), the piperazine-1,4-diium cations and piperazine mol-ecules lie on crystallographic inversion centres. In the crystal structure, inter-molecular N-H⋯O and N-H⋯N hydrogen bonds link the components to form two-dimensional layers parallel to the (001) plane. These layers are, in turn, connected by weak inter-molecular C-H⋯O hydrogen bonds and π-π stacking inter-actions [centroid-centroid distance between parallel aryl rings = 3.764 (2) Å, interplanar spacing = 3.500 (2) Å and ring offset = 1.387 (2) Å], forming a three-dimensional framework.
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