In the dication of the title salt, C16H21ClN2O(2+)·2C6H2N3O7 (-) [systematic name: 2-{(4-chloro-phen-yl)[2-(di-methyl-aza-nium-yl)eth-oxy]meth-yl}pyridinium bis-(2,4,6-tri-nitro-phenolate), contains a carbinoxaminium dication and two picrate anions, which are held together through inter-molecular N-H⋯O hydrogen bonds. In the dication, the two aromatic rings form a dihedral angle of 80.1 (1)°. I...

2. One method is based on condensation with ethyl acetoacetate in 2N-NaOH to form a product which gives a red colour with Ehrlich's reagent (p-dimethylaminobenzaldehyde). 3. The other method is a modification of the Jaff6 picrate reaction and depends on the reaction of an alkaline picrate complex of ALA with HCI to give an orange-red colour. 4. The effects of varying different factors in the de...

H and C NMR spectra are recorded for twelve picrate derivatives 4-15 derived from some 3-alkyl-2,6diarylpiperidin-4-ones and 3,5-dimethyl-2,6-diarylpiperidin-4-ones. The difference in the chemical shift of equatorial methylene proton and axial methylene proton at C(5) [Δ = δeq − δax] is highly negative in 4-13 which is in contrast to the value observed in the corresponding parent piperidin-4-on...

Eight organo-iron ferrocene derivatives and arenocenium salts were prepared and evaluated by "in vitro" assay against one strain of Trypanosoma cruzi (Y). Six of the eight organo-iron compounds assayed, piperazinium diferrocenoate 1, eta(6)-(o-xylene)-eta(5)-(cyclopentadienyl) Iron(II) hexafluorophosphate 3, eta(6)-(mesitylene)-eta(5)-(cyclopentadienyl) iron(II) hexafluorphosphate 5, eta(6)-(du...

The asymmetric unit of the title organic salt [systematic name: 1H-pyrazol-2-ium 2,4,6-tri-nitro-phenolate-1H-pyrazole (1/1)], H(C3H4N2)2 (+)·C6H2N3O7 (-), consists of one picrate anion and one hydrogen-bonded dimer of a pyrazolium monocation. The H atom involved in the dimer N-H⋯N hydrogen bond is disordered over both symmetry-unique pyrazole mol-ecules with occupancies of 0.52 (5) and 0.48 (5...

An automated kinetic method to determine creatinine in serum with the Jaff#{233} reaction is described. The method does not require deproteinization or adsorption of creatinine on Fuller’s earth or ion.exchange resin. A maximum of 29 serum samples, standards, and control sera can be assayed in less than 1.5 mm. Interferences by most of the known Jaff#{233}-positive serum constituents were studi...

In the crystal structure of the title compound, C(43)H(34)N(3)O(5) (+)·C(6)H(2)N(3)O(7) (-)·C(3)H(6)O, the large dimension and shape of the cation are responsible for the elongation of the ortho-rhom-bic unit cell. The ions and acetone mol-ecules are linked together by a system of hydrogen bonds involving an inter-molecular hydrogen bond between one N atom of the cation and the O atom of aceton...