Synthesis, structure characterization, photoluminescence properties and TD-DFT calculations for two new borates.

Due to their rich structural chemistry and wide variety of applications, borate materials have provided a rich area of research. In a continuation of this research, diethylammonium bis(2-oxidobenzoato-κO,O)borate, CHN·BO(CHO), (1), and propylammonium bis(2-oxidobenzoato-κO,O)borate, CHN·BO(CHO), (2), have been synthesized by the reaction of boric acid with salicylic acid under ambient conditions. In both structures, the B atom exhibits a slightly distorted tetrahedral environment formed by the bidentate coordination of two salicylate anions via the O atoms of the central carboxylate and oxide groups.

Bis(tetra-phenyl-phospho-nium) tetra-chlorido-cobaltate(II).

The title compound, (C24H20P)2[CoCl4], was prepared under hydro-thermal conditions. In the crystal, the tetra-phenyl-phospho-nium cations are linked by pairs of weak C-H⋯π inter-actions into supra-molecular dimers; the Co(II) cations lie on twofold rotation axes and the tetra-hedral [CoCl4](2-) anions are linked with the tetra-phenyl-phospho-nium cations via weak C-H⋯Cl hydrogen bonds.

Di-aqua-bis-[2-(2-hy-droxy-eth-yl)pyridine-κ(2) N,O]cobalt(II) dichloride.

In the title salt, [Co(C7H9NO)2(H2O)2]Cl2, the Co(II) cation, located on an inversion center, is N,O-chelated by two hy-droxy-ethyl-pyridine ligands and coordinated by two water mol-ecules in a distorted O4N2 octa-hedral geometry. In the crystal, the Cl(-) anions link with the complex cations via O-H⋯Cl hydrogen bonds, forming a three-dimensional supra-molecular architecture. π-π stacking is observed between the pyridine rings of adjacent mol-ecules [centroid-centroid distance = 3.

4-(Di-methyl-amino)-pyridinium trichlorido[4-(di-methyl-amino)-pyridine-κN]cobaltate(II).

In the anion of the title compound, (C7H11N2)[CoCl3(C7H10N2)], the Co(II) ion is coordinated by one N atom from a 4-(di-methyl-amino)-pyridine (DMAP) ligand and three Cl atoms, forming a CoNCl3 polyhedron with a distorted tetra-hedral geometry. In the crystal, cations and anions are linked via weak N-H⋯Cl and C-H⋯Cl hydrogen bonds. Double layers of complex anions stack along the b- axis direction, which alternate with double layers of 4-(di-methyl-amino)-pyridinium cations.

catena-Poly[[bis-[4-(dimethyl-amino)-pyridine-κN (1)]cobalt(II)]-di-μ-azido-κ(4) N (1):N (3)].

The title layered polymer, [Co(N3)2(C7H10N2)2] n , contains Co(II), azide and 4-(dimethyl-amino)-pyridine (4-DMAP) species with site symmetries m2m, 2 and m, respectively. The Co(2+) ion adopts an octa-hedral coordination geometry in which four N atoms from azide ligands lie in the equatorial plane and two 4-DMAP N atoms occupy the axial positions. The Co(II) atoms are connected by two bridging azide ligands, resulting in a chain parallel to the c axis.

Bis(azido-κN)bis-[4-(dimethyl-amino)-pyridine-κN]zinc.

In the title complex, [Zn(N3)2(C7H10N2)2], the Zn(II) atom is coordinated by two N atoms from two 4-(dimethyl-amino)-pyridine (DMAP) ligands and by two N atoms from two azide anions in a distorted tetra-hedral coordination geometry. In the crystal, weak C-H⋯N hydrogen bonds between the DMAP and azide ligands link these discrete complex mol-ecules into a three-dimensional supra-molecular network.

Bis(3-carboxy-anilinum) bis-(perchlorate) monohydrate.

In the structure of the title compound, 2C(7)H(8)NO(2) (+)·2ClO(4) (-)·H(2)O, the ions are connected via N-H⋯O, N-H⋯(O,O), O-H⋯O, O-H⋯(O,O) and C-H⋯O hydrogen bonds into a three-dimensional network.

Adeninium 3-carboxy-anilinium bis-(perchlorate) trihydrate.

In the title salt, C(5)H(6)N(5) (+)·C(7)H(8)NO(2) (+)·2ClO(4) (-)·3H(2)O, the 3-carboxy-anilinium and adeninium cations are monoprotonated at the amino group and at a pyrimidine N atom respectively. In the crystal, the components are involved in extensive three-dimensional hydrogen-bonding networks composed of O-H⋯O, N-H⋯O, O-H⋯N, N-H⋯N and C-H⋯O inter-actions. Bifurcated hydrogen bonds are observed between perchlorate O atoms and adeninium cations.