New Binuclear Nickel(II) Species

785-78

Pentacoordinated Ni(bidentate)(tridentate) chelates and their hydrates

Reaction of bis(acetylacetonato)nickel(II), Ni(acac)2 (dihydrate or anhydrous), with tridentate Schiff bases (HB) in boiling toluene followed by exposure of the reaction mixture to moist air leads to the ready isolation of crystalline complexes of composition Ni(acac)(B) (OH2). Their spectral and magnetic properties are in accord with pseudooctahedral geometry. On heating, these complexes readily dehydrate giving rise to Ni(acac) (B). These have infrared spectra characteristic of the mixed ligand formulation. Their electronic spectra can be readily fitted with high-spin square pyramidal geometry. In moist solvents the equilibrium between Ni(acac) (B) and Ni(acac)(B)(OH2) can be identified from spectral data. The thermodynamics for this equilibrium has been studied in one case using variable temperature spectral results

New high-spin square pyramidal and octahedral complexes of nickel(II)

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New mixed-ligand complexes of cobalt(II)

This article does not have an abstract

Some mixed-ligand complexes of copper(II)

Bis(salicybidehydato) copper(II), (sal)2Cu, reacts with 1 mol of the amine H2;NCH2,CH2,NR2, to give rise to complexes of formula (sal)(salNR2)Cu where salNR2, is the Schiff base derived from sal and H2;NCH2,CH2,NR2,. Similar reactions also occur with bis(2-hydroxyacetophenonato)copper(II). The mixed.ligand complexes are characterized using analytical. infrared, and molecular weight data. They have normal magnetic moments. On the basis of electronic spectra it is suggested that they have pentacoordinated geometry. When these mixed-ligand complexes are treated with HCI or HBr. the biden-tate moiety (e.g., sal) is replaced by halide ion: the resultant complexes being planar. A mechanism for this reaction is suggested. From the halide, the corresponding nitrate and perchlorate can be obtained by double decomposition. The probable structures of these species are discussed In the light of conductivity, infrared, magnetic, and electronic spectral data

Density & Refractive Index Increments & Excess Molar Volumes of Binary Liquid Mixtures

820-82

A Theoretical Justification for Viscosity Models & Prediction of Excess Thermodynamic Functions for Binary Liquid Mixtures

641-64

Excess Molar Volumes of Binary Mixtures Containing Bromoform at 25°C

465-46

Thermodynamic interactions in binary mixtures of 1-chloronaphthalene and monocyclic aromatics

768-777Thermodynamic interactions in binary mixtures of 1-chloronaphthalene with the monocyclic aromatics have been studied through calculation of excess molar volumes from Flory equation of state and that of Prigogine-Flory-Patterson theories using the experimental results of density, viscosity and speed of sound. The experimental excess viscosity has been compared with Bloomfield-Dewan theory, while the excess isentropic and isothermal  compressibilities have been analysed using Benson-Kiyohara theory. Efforts have also been made to calculate the excess internal pressure from Prigogine-Saraga theory. All the excess quantities have been fitted to Redlich-Kister equation to estimate the binary coefficients and standard deviations.</span

Molecular transport of binary liquid mixtures into EPDM and NBR membranes at 25°C

328-333Diffusion and sorption of several organic solvents and their binary mixtures in the whole scale of mixture composition have been studied at 25°C with NBR and EPDM rubber membranes. Diffusion results of single solvents as well as binary mixtures have been analysed to study their dependence on concentration of the probe molecules in rubber membranes