Di-μ-chlorido-1:2:3κ ;2:3:4κ -di-μ-chlorido-1:2κ ;3:4κ -tetra-kis-[(4-amino-1,5-dimethyl-2-phenyl-2,3-di-hydro-1-pyrazol-3-one-κ ,)chlorido-cadmium(II)] 1.7-hydrate: a new six-coordinate geometry index, τ.

The title centrosymmetric tetra-nuclear cadmium(II) com-plex of 4-amino-anti-pyrine and chloride ions, [CdCl(CHNO)]·1.7HO, was synthesized using methanol as solvent. The two independent Cd ions in the asymmetric unit have different geometries; the outer Cd atoms have fivefold CdONCl coordination spheres, while the inner Cd atoms have sixfold CdONCl coordination spheres.

Structure of ()-4-amino-5-{[(1,5-dimethyl-3-oxo-2-phenyl-2,3-di-hydro-1-pyrazol-4-yl)imino]-meth-yl}-1-methyl-2-phenyl-2,3-di-hydro-1-pyrazol-3-one: aerial oxidation of 4-amino-anti-pyrine in di-methyl-formamide.

The title compound, CHNO (), is the result of the aerial oxidation of the 5-methyl group of 4-amino-anti-pyrine to an aldehyde group followed by Schiff base formation with a second mol-ecule of 4-amino-anti-pyrine. The reaction only takes place in the presence of di-methyl-formamide. The central unit of the mol-ecule is close to planar, the pyrazole rings being inclined to each other by 3.

()-,-Diethyl-4-{[(4-meth-oxy-phen-yl)imino]-meth-yl}aniline: crystal structure, Hirshfeld surface analysis and energy framework.

In the title benzyl-ideneaniline Schiff base, CHNO, the aromatic rings are inclined to each other by 46.01 (6)°, while the C-N= C-C torsion angle is 176.9 (1)°.

Syntheses, crystal structures, Hirshfeld surface analyses and energy frameworks of two 4-amino-anti-pyrine Schiff base compounds: ()-4-{[4-(di-ethyl-amino)-benzyl-idene]amino}-1,5-dimethyl-2-phenyl-1-pyrazol-3(2)-one and ()-4-[(4-fluoro-benzyl-idene)amino]-1,5-dimethyl-2-phenyl-1-pyrazol-3(2)-one.

The title Schiff base compounds, CHNO () and CHFNO (), were each synthesized by a single-step condensation reaction. The substituted benzyl-idene ring is inclined to the pyrazole ring mean planes by 22.92 (7)° in and 12.

Performance enhancement of MC-CDMA system through novel sensitive bit algorithm aided turbo multi user detection.

Multi carrier code division multiple access (MC-CDMA) system is a promising multi carrier modulation (MCM) technique for high data rate wireless communication over frequency selective fading channels. MC-CDMA system is a combination of code division multiple access (CDMA) and orthogonal frequency division multiplexing (OFDM). The OFDM parts reduce multipath fading and inter symbol interference (ISI) and the CDMA part increases spectrum utilization.