A simple, sensitive and rapid ionpair high performance liquid chromatographic methodwas developed for the estimation ceftriaxone sodium (CS) and tazobactum sodium (TS) in pharmaceutical dosage forms. Lichrocart100-RP18e5μm-C18 column was used with a mobile phase containing mixture of 0.012M tetra butyl ammonium hydroxide in 0.01M potassium dihydrogen phosphate : acetonitrile in the ratio of 70:...

In the presence of the sodium salt of a bulky anion, which allows the solubility of Na(+) in low polarity solvents, various tetra(4-pyridyl)porphyrin derivatives can spontaneously self-assemble from CH(2)Cl(2) into supramolecular nanostructures exhibiting a long-range order, through the coordination of Na(+) ions by the pyridyl moieties at the macrocycle periphery.

The title compound, C(6)H(10)N(8)·2H(2)O, was prepared by the reaction of hexanedinitrile and sodium azide. The di-1H-tetra-zole mol-ecule lies on a crystallographic centre of inversion and is linked to the water mol-ecules by N-H⋯O and O-H⋯N hydrogen bonds, forming a two-dimensional supra-molecular structure in the crystal.

The title compound, Na[Cu(en)2][Cu(CN)4], where en represents ethyl-enedi-amine, NH2CH2CH2NH2, crystallizes as a salt with two distinct cations, Na(+) and [Cu(II)en2](2+), and discrete [Cu(I)(CN)4](3-) anions. The anion geometry is tetra-hedral, with angles at the copper atom ranging from 105.0 (1) to 115.4 (1)°. The Cu-C distances are in the range 1.976 (3) to 1.993 (3) Å. The divalent copper ...

The title compound, Na(+)·C(7)H(7)O(2)S(-)·4H(2)O, is the hydrate of the sodium salt of para-toluene-sulfinic acid. The mol-ecular geometry around the sulfur atom is tetra-hedral with X-S-Y angles spanning a range of 102.23 (6)-110.04 (6)°. In the crystal, the water mol-ecules connect the sodium cations into chains along the b axis via O-H⋯O hydrogen bonds. An inter-molecular O-H⋯π inter-action...

Potassium sodium silver tetra-niobium nona-oxide arsenate, K(0.12)Na(0.54)Ag(0.34)Nb(4)AsO(13), synthesized by solid-state reaction at 1123 K, adopts a three-dimensional framework delimiting tunnels running along [001] in which occupationally disordered sodium, silver, and potassium ions are located. Of the 11 atoms in the asymmetric unit (two Nb, one As, one Ag, one K, one Na and fiveO), nine ...

The title compound, sodium dioxidomolybdenum(VI) arsenate(V), β-NaMoO(2)AsO(4), was prepared by solid-state reaction at 953 K. In the crystal structure, the AsO(4) tetra-hedra and MoO(6) octa-hedra (both with m symmetry) share corner atoms to form a three-dimensional framework that delimits cavities parallel to [010] where disordered six-coordinated sodium cations (half-occupation) are located....