A. Indira

Crystal structure of lignocaine tetrachloroferrate(III) complex

The crystal structure of lignocaine tetrachloroferrate(III) complex, FeCl14H22N2OCl4, has been determined by X-ray diffraction using CuKalpha radiation. The compound crystallizes in triclinic space group P1BAR with unit cell parameters a = 8.7151(2) angstrom, b = 10.147(2) angstrom, c = 12.215(3) angstrom, alpha = 107.19(2)-degrees, beta = 106.29(2)-degrees, gamma = 92.69(2)-degrees with V = 980.5(4) angstrom3, Z = 2, D(m) = 1.441 Mg . m-3, D(c) = 1.463 Mg. M-3, mu = 22.75 mm-1. The structure was solved using 2728 reflections [I > 2.5sigma(I)] out of 3230 reflections by MULTAN. The final residuals are R(f) = 0.085 (R(w) = 0.106).

Crystal structure of lignocaine hydrochloride-zinc chloride complex

Abstract Crystal and molecular structure of lignocaine hydrochloride–zinc chloride complex, ZnCl4C28N4O2H44, is reported. The sample cyrstallizes in the monoclinic space group P21 with a = 9.128(2) A, b = 19.196(5) A, c = 19.696(5) A, β= 95.81(1)°, V = 3433.43(1) A3, Z = 4. The structure of the title compound was solved using 3527 counter intensities with 1 > 2.5σ(I) using CuKα, radiation and refined to an R value of 0.071. Each metal group is associated with a pair of ligands. The planes of the phenyl groups of one of the pair are nearly perpendicular to the planes of the phenyl groups of the other.

Crystal Structure of Lignocaine Hydrochloride-Manganese Chloride Complex

Abstract The crystal and molecular structure of lignocaine hydrochloride-manganese chloride complex, Mn-Cl4C28H44O2N4, is reported. The sample crystallizes in the space group P 21 c with a = 9.210(2) A, b = 19.489(4) A, c = 19.646(4) A, β = 95.64(3)°, V = 3509.26(1) A3, Z = 4. The structure was solved by SHELXS-86 using 2619 reflections with I > 3[sgrave](I) and refined to an R value of 0.067. The complex has a stoichiometry of 1:2. The ligands and the metal group are not stacked independently.

Electrical resistivities and activation-energies of diphenyl pyraline hydrochloride complexes

The resistivity measurements of complexes of diphenylpyraline hydrochloride with Co acetate, Cu chloride, Cu acetate, and Co thiocyanate as a function of temp. were undertaken. All the materials studied show semiconducting behavior. This behavior can be accounted for by the alternate stacking of the donor and acceptors in the crystal structures. The activation energy of the complexes range between 0.36 and 1.40 eV. [on SciFinder(R)]

Crystal Structure of Diphenyl Pyraline Hydrochloride-Cobalt Chloride Complex

Abstract The crystal structure of the complex of diphenyl pyraline hydrochloride with cobalt chloride, C38H46O2N2Cl4Co has been determined by X-ray diffraction using CuKα radiation. The compound crystallizes in monoclinic space group P21/n with the cell parameters a = 18.120(4)A, b = 8.179(3)A, c = 26.805(3)A, β = 102.60(1)° with Z = 4, V = 3876(1)A3. The structure was solved using 5484 reflections. The stucture was refined to a final wR of 0.2944 (R = 0.1130). The packing of the molecules shows a layered arrangement.

Crystal Structure of Dichloro Dinitro Oxouranium(VI) Lignocaine Complex

Abstract Crystal and molecular structure of Dichloro dinitro oxouranium(VI) lignocaine complex, C28H44O10N6 CI2U, is reported. The sample crystallizes in the monoclinic space group P21 /a with a = 15.719(3) A, b = 12.363(5) A, c = 19.647(4) A, β = 101.34(2)°, V= 3744(2) A3, Z = 4. The structure was solved using 6916 reflections measured with CuKα radiation. The stucture was refined to a final wR of 0.2391 (R = 0.087). The two nitrate groups bound to the uranium atom are planar and are almost perpendicular to each other. The packing of the molecules shows a layered arrangement.

Crystal structure of mesogenic material: 4'-n-pentyl cyclohexyl-(4-n-pentyl cyclohexane)-1-carboxylate

The compound C 23 O 2 H 42 crystallizes in the triclinic space group P1 with a = 5.5478(2) A, b = 9.7768(3) A, c = 10.6846(2) A, α = 96.428(3)°, β = 94.161(4)°, τ = 103.807(3)° and one molecule per unit cell. D calc = 1.047 Mg . m −3 . The structure was solved by direct methods (SOLVER-NRCVAX 1 ) using 1611 observed reflections [I > 2σ(I)]. It was refined by block-diagonal and full-matrix least-squares method to a final R of 0.078. The molecule is almost stretched and linear. The angle between the mean planes of the cyclohexane rings is 3.87(2)°. The packing of the molecules exhibits a strong layering as required for a smectic liquid crystalline phase - the cyclohexane groups forming one line with the extended alkyl chains penetrating into the neighbouring layers

Crystal-structure of lignocaine hydrochloride - palladium thiocyanate complex

The title compound, Pd0.5S2C16H23ON4, crystallizes in the monoclinic space group P2(1)/n with a = 9.917(8) angstrom, b = 15.382(5) angstrom, c = 13.218(2)/n, beta = 100.12(3)degrees, Z = 4. The structure was solved by SHELXS-86 using 2077 out of 5778 reflections with I > 3sigma(I). Full-matrix refinement gave a final residual of R(f) = 0.048. The coordination polyhedron is undistorted and it does not show any hydrogen bonding. The packing of the molecules shows a layered arrangement.

Crystal structure of mesogenic material – trans-4-propyl cyclohexyl-4-(trans-4-pentyl cyclohexyl) benzoate

The compound (C27H42O2) crystallizes in the triclinic space group Ρ J with a = 7.292(2) Ä, 6 = 11.417(2) A, c = 15.175(3) Α, α = 86.27(2)°, β = 83.11(3)°, γ = 88.94(2)° and two molecules per unit cell. Dc = 1.058 Mg m 3 . The structure was solved by direct methods (MULTAN) using 1746 observed reflections [ / > 3.5σ(/)]. It was refined by block diagonal least squares method to a final Rf— 0.092 (/?w = 0.073). The central phenyl ring makes angles of 111.77(18)° and 125.05(18)° with the mean planes of the two cyclohexane rings. The mean planes of the two cyclohexane rings make an angle of 14.53(19)°. The pairs of molecules related by a centre of symmetry form an imbricated arrangement in the crystalline state when viewed along c and a strong layering when viewed along a.