A novel complex of cadmium (II) picrate (pic) with V-shaped ligand bis(N-allylbenzimidazol-2-ylmethyl)benzylamine (babb), with composition [Cd(babb)(2)](pic)(2), was synthesized and characterized by elemental analyses and electrical conductivity, IR, and UV/visible spectra. The crystal structure of the complex has been determined by the single-crystal X-ray diffraction. In the complex, the coor...

The ion-pair formation constant (K(MLA)(0) in mol(-1) dm(3)) for Li(B15C5)(+) with a picrate ion (Pic(-)) in water was determined by potentiometry with a K(+)-selective electrode at 25 degrees C and an ionic strength of 0, where B15C5 denotes benzo-15-crown-5 ether. Using the concentration equilibrium constants, K(MLA), estimated from this value, the extraction constants (mol(-2) dm(6) unit) of...

Actively immunizing fractions of protein nature have been isolated from broth culture filtrates of Pneumococcus Type I by ultrafiltration, precipitation at a definite hydrion concentration, and the separation of a soluble picrate fraction. The method appears to be suitable for the initial purification of this antigen.

The title salt, C13H11N2O2 (+)·C6H2N3O7 (-), is the unexpected product of a domino reaction of 3-cyano-methyl-1-methyl-imidazolium chloride with salicylic aldehyde in the presence of picric acid. In the cation, the 1H-imidazole ring is twisted by 63.2 (1)° from the 2H-chromen plane. In the crystal, cations and anions are alternately stacked along the a axis through π-π stacking inter-actions be...

IN THE TITLE SALT [SYSTEMATIC NAME: 3-(1H-imidazol-1-yl)propanaminium 2,4,6-tri-nitro-phenolate], C6H12N3 (+)·C6H2N3O7 (-), there are five independent cation-anion pairs (A, B, C, D, E) in the asymmetric unit. In the cation, the ammonium group is protonated with the amino-propyl group nearly at right angles to the mean plane of the imidazole ring showing C-N-C-C torsion angles ranging from 79.6...

In the crystal structure of the title salt, C(8)H(11)N(4)O(2) (+)·C(6)H(2)N(3)O(7) (-), the pictrate anion participates in extensive hydrogen bonding with the guanidinium ion group of the cation, linking the mol-ecules through N(+)-H⋯O(-) hydrogen bonds and inter-molecular N-H⋯O and C-H⋯O inter-actions. These hydrogen-bonding configurations involve two three-centre/bifurcated bonds [N-H⋯(O,O)] ...

In the title compound, [Zn(H(2)O)(6)](C(6)H(2)N(3)O(7))(2), the Zn(II) ion is located on an inversion center and is coordinated by six water mol-ecules in an octa-hedral geometry. The picrate anions have no coordination inter-actions with the Zn(II) atom. The three nitro groups are twisted away from the attached benzene ring by19.8 (3), 6.5 (4) and 28.6 (3)°. There are numerous O-H⋯O hydrogen b...