Acridinium 3,5-dicarboxy­benzoate monohydrate

The title compound, C13H10N+·C9H5O6 −·H2O, exhibits a wide range of non-covalent inter­actions, such as O—H⋯O and N—H⋯O hydrogen bonds, π–π stacking [centroid-centroid distances = 3.562 (8) and 3.872 (8) Å] and ion pairing, connecting the various components into a supra­molecular structure

Acridinium 6-carb­oxy­pyridine-2-carboxyl­ate monohydrate

The title compound, C13H10N+·C7H4NO4 −·H2O or (acrH)+(pydcH)−·H2O, is a monohydrate of acridinium cations and a mono-deprotonated pyridine-2,6-dicarb­oxy­lic acid. The structure contains a range of non-covalent inter­actions, such as O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds, as well as π–π stacking [range of centroid–centroid distances = 3.4783 (5)–3.8059 (5) Å]. The N—H⋯O hydrogen bond between the donor acridinium cation and the carboxyl­ate acceptor is particularly strong. The average separation between the π-stacked acridinium planes is 3.42 (3) Å

[1,3-Bis(2-ethoxy­phen­yl)triazenido]bromidomercury(II)

To the central atom of the title compound, [HgBr(C16H18N3O2)], is attached one bromide ion and a 1,3-bis­(2-ethoxy­phen­yl)triazenide ligand through one O and two N atoms, forming a distorted square-planar geometry around the HgII atom. The mononuclear complexes are linked into centrosymmetric dimers by non-classical inter­molecular C—H⋯N hydrogen bonds and by weak Hg–η3-arene π-inter­actions [mean distance = 3.434 (3) Å]. The resulting dimeric units are assembled into zigzag chains by translation along the crystallographic c axis through secondary C—H⋯π edge-to-face benzene ring inter­actions

Hydroxonium creatininium bis­(pyridine-2,6-dicarboxyl­ato-κ3 O 2,N,O 6)cobaltate(II) trihydrate

The title compound, (C4H8N3O)(H3O)[Co(C7H3NO4)2]·3H2O, contains a protonated creatininium cation, a hydrox­onium (H3O)+ cation, a [Co(pydc)2]2− (pydcH2 = pyridine-2,6-dicarboxylic acid) complex anion, and three uncoordinated water mol­ecules. The CoII atom is coordinated by four O and two N atoms from two pydc ligands in a distorted octa­hedral environment. The structure also contains three uncoordinated water mol­ecules. Extensive inter­molecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds, π–π stacking inter­actions [centroid–centroid distances = 3.565 (14) and 3.425 (14) Å] and O⋯π inter­actions [O⋯centroid distance = 3.480 (2) Å] connect the various components in the crystal structure

Bis[1,3-bis­(2-cyano­phen­yl)triazenido]mercury(II)

In the title compound, [Hg(C14H8N5)2], the central atom is four-coordinated by two bidentate 1,3-bis­(2-cyano­phen­yl)triazenide ligands in a distorted square-planar geometry. The asymmteric unit is composed of one ligand molecule and one HgII ion, which is disordered over two sites, one lying on an inversion center and the other on a general position with site-occupancy factors of 0.2378 (7) and 0.3811 (7), respectively. The monomeric mol­ecules of the complex are linked into pairs through non-classical C—H⋯N hydrogen bonds. The resulting dimeric units are assembled by translation along the crystallographic c axis into chains linked through secondary π–π inter­actions [centroid–centroid distances = 3.685 (2) and 3.574 (2) Å], as well as C—H⋯π stacking inter­actions, resulting in a two-dimensional architecture

Poly[[piperazine-1,4-dium [diaqua­tetra­kis­(μ-sulfanediyldiacetato)­dicerate(III)]] trihydrate]

The title compound, (C4H12N2)[Ce2(C4H4O4S)4(H2O)2]·3H2O, features a polymeric anion with a centrosymmetric Ce2O2 core and a Ce⋯Ce distance of 4.3625 (4) Å. The anions form ribbons {[Ce2(C4H4O4S)4(H2O)2]2−}n extending along [100]. The doubly protonated piperazinium cations reside on centers of inversion and link the polymeric ribbons via N—H⋯O hydrogen bonding. Each CeIII cation is ten-coordinated by an O2S donor set from two tridentate sulfanediyldiacetate (tda) ligands, one water mol­ecule and three other tda O donors from adjacent {Ce(tda)2(H2O)} units in a distorted bicapped cubic environment. Additional O—H⋯O hydrogen bonding involving the coordinated and solvent water mol­ecules is also present. H atoms of the crystal water molecules could not be located and were not included in the refinement

Bis(guanidinium) tris­(pyridine-2,6-dicarboxyl­ato-κ3 O 2,N,O 6)zirconate(II) tetra­hydrate

In the title complex, (CH6N3)2[Zr(C7H3NO4)3]·4H2O, the ZrIV ion lies on a twofold rotation axes and is coordinated by six O and three N atoms of three tridentate pyridine-2,6-dicarboxyl­ate ligands, forming a slightly distorted tricapped trigonal–prismatic geometry. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds link the components into a three-dimensional network

(3-Amino­phen­yl)diphenyl­phosphine oxide–2-propanol (1/1)

The title compound, C18H16NOP·C3H8O, was synthesized by the reduction of (3-nitro­phen­yl)diphenyl­phosphine oxide in the presence of 2-propanol as recrystallization solvent. There are two molecules in the asymmetric unit. Each P atom is tetra­coordinated by three C and one O atom from two phenyl fragments, one aniline group and one double-bonded O atom in a distorted tetra­hedral geometry. C—H⋯π and N—H⋯π inter­actions are present. In the crystal structure, a wide range of non-covalent inter­actions consisting of hydrogen bonding [of the types of O—H⋯O, N—H⋯O and C—H⋯O, with D⋯A distances ranging from 2.680 (3) to 3.478 (3) Å] and π–π [centroid–centroid distance of 3.7720 (15) Å] stacking inter­actions connect the various components into a supra­molecular structure

1-(3,5-Dichloro­phen­yl)-3-(2-meth­oxy­phen­yl)triaz-1-ene

The title mol­ecule, C13H11Cl2N3O, is almost planar and adopts a trans conformation with respect to the –N=N– bond; the dihedral angle between the rings is 3.47 (2)°. The N—N bond lengths indicate the presence of single- and double-bond characters and hence the –N=N—NH– moiety. In the crystal, inversion dimers linked by pairs of N—H⋯Cl hydrogen bonds occur, and C—H⋯π and π–π stacking interactions are also observed

Bis[1-(2-eth­oxy­phen­yl)-3-(4-nitro­phen­yl)triazenido]mercury(II)

In the title compound, [Hg(C14H13N4O3)2], the central Hg atom (site symmetry 2) is six-coordinated by two tridentate 1-(2-eth­oxy­phen­yl)-3-(4-nitro­phen­yl)triazenide ligands through two N and one O atoms. The mononuclear complex mol­ecules are connected into two parallel chains by inter­molecular C—H⋯O hydrogen-bonding inter­actions. These chains are connected to each other by face-to-edge C—H⋯π inter­actions between the CH of the ethoxy groups and the aromatic rings, resulting in a two-dimensional architecture in the ac plane