trans-2,5-Dimethylpiperazine-1,4-diium dinitrate

trans-2,5-Di­methyl­piperazine-1,4-diium dinitrate

In the structure of the title salt, C6H16N2 (2+)·2NO3 (-), the cations are connected to the anions through bifurcated N-H⋯(O,O) and weak C-H⋯O hydrogen bonds, generating corrugated layers parallel to the (100) plane. The organic cation is centrosymmetric and the diprotonated piperazine ring adopts a chair conformation, with the methyl groups occupying equatorial positions.

Trans-, 14 | 2012

trans-Diacetonitrile­tetra­kis(1H-pyrazole-κN 2)nickel(II) dinitrate

In the title complex, [Ni(CH(3)CN)(2)(C(3)H(4)N(2))(4)](NO(3))(2), the cation lies on an inversion center and adopts an octa-hedral coordination geometry about the Ni atom. The two acetonitrile ligands are in a trans conformation. N-H⋯O hydrogen bonds between cations and anions link the complex mol-ecules into one-dimensional chains running parallel to [100].

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trans-2,5-Di­methyl­piperazine-1,4-diium bis(perchlorate) dihydrate: crystal structure and Hirshfeld surface analysis

The asymmetric unit of the title hydrated mol-ecular salt, C6H16N2 (2+)·2ClO4 (-)·2H2O, contains a half dication (completed by inversion symmetry), a perchlorate anion and a water mol-ecule. The extended structure consists of infinite chains of formula [(ClO4)H2O] n (n) (-) ions extending along the b axis linked by Ow-H⋯O (w = water) hydrogen bonds. These chains are cross-linked by the dication...