Search

The title compound, (C10H11N2)2[CuBr3], contains layers of planar monoprotonated cations. Isolated trigonal-planar [CuBr3]2− anions are hydrogen bonded to cations in adjacent layers, providing three-dimensional stability to the crystal structure. [ABSTRACT FROM AUTHOR]

The structure of the title compound, (C4H12N)2[CuCl4] or [DEA]2[CuCl4] (DEA is diethylammonium), at 84 (2) K has three crystallographically independent [CuCl4]2− anions in the asymmetric unit, each with a different geometry. These geometries range from essentially square-planar to compressed tetrahedral geometry. The low-temperature structure reported here is the same as the room-temperature structure [Harlow & Simonsen (1976). Am. Crystallogr. Assoc. Ser. 2 Program Abstr. 4, Abstract PBlO], thereby confirming the absence of a low-temperature phase transition. [ABSTRACT FROM AUTHOR]

The title compound, [NiCl2(C6H8N2)2], contains centrosymmetric mol­ecules with two phenyl­ene­di­amine ligands coordinated in a bidentate fashion. The Ni-N distances are 2.088 (1) and 2.096 (1) Å, and the Ni-Cl distance of 2.4635 (4) Å. The plane of each phenyl­enedi­amine mol­ecule makes a dihedral angle of 26.53 (7)° with the NiN4 plane. Extensive hydrogen bonding leads to distinct cleavage in the bc plane. [ABSTRACT FROM AUTHOR]

In the title compound, 4-(di­methyl­amino)­pyridine is proton­ated on the pyridine N atom. The N(CH3)2 moiety is twisted 4.4 (2)° from the pyridine-ring plane. The octahedral [SnCl6]2− anion is hydrogen bonded via trans-Cl atoms to pyridinium N atoms from two cations forming (C7H11N2)2[SnCl6] structural units. [ABSTRACT FROM AUTHOR]

The title compound, (C5H6Br2N3)2[CuBr4], contains isolated substituted pyridinium cations and [CuBr4]2− anions. The di­amino­di­bromo­pyridinium ions are planar, while the CuII ions have a distorted compressed tetrahedral coordination with C2 symmetry. The two independent trans-Br-Cu-Br angles are 128.9 (1) and 136.0 (1)°, with Cu-Br distances of 2.3939 (15) and 2.3790 (16) Å. [ABSTRACT FROM AUTHOR]