Hydrazinium nitrate

The monoprotonated hydrazinium cation in the title compound, N₂H₅⁺·NO₃^-, forms several types of hydrogen bonds. Stronger ones, in which the H atoms attached to the protonated N atom take part, link cations and anions into layers. Less strong hydrogen bonds, with participation of H atoms attached to the non-protonated N atom, link the layers into a three-dimensional structure. In addition to hydrogen bonds, short contacts of 2.8607 (10) Å have been found between O and N atoms of neighbouring nitrate anions. Such contacts can correspond to a weak inter­molecular inter­action similar to that in organic compounds containing nitro groups.

2,2':6',2''-Terpyridinium dinitrate

The doubly protonated terpyridinium cation in the title compound, C₁₅H₁₃N₃²⁺·2NO₃^-, has a cis-cis conformation. Both H atoms attached to the N atoms of the outer rings form hydrogen bonds with the same O atom of one of the two nitrate anions.

Diacetatodiaqua­dioxouranium(VI) acetic acid disolvate

The coordination polyhedron of the U atom in the title compound, [U(C₂H₃O₂)₂O₂(H₂O)₂]·2CH₃COOH, is a distorted hexa­gonal bipyramid, with the equatorial positions occupied by four O atoms of two bidentate-chelating acetate anions and two O atoms of coordinated water mol­ecules. The complex lies on an inversion centre. A two-dimensional network of hydrogen bonds is present in the crystal structure.