Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 1996"

Excess Molar Volumes, Relative Permittivities, and Refractive Indexes of 1,1,2,2-Tetrachloroethane + Pyridine, +Anisole, +Methyl Ethyl Ketone, and +1,4-Dioxane at 303.15 K

Abstract: Excess molar volumes, relative permittivities, er, and refractive indexes, nD, have been measured for binary mixtures of 1,1,2,2-tetrachloroethane (CHCl2CHCl2) with pyridine (C5H5N), anisole (C6H5OCH3), methyl ethyl ketone (CH3COC2H5), and 1,4-dioxane (1,4-C4H8O2) at 303.15 K. has been found to be negative throughout the entire mole fraction range for all these mixtures. The values of the deviations of er and nD from a mole fraction average, which are represented respectively by Δer and ΔnD have been calculated. The results of ΔnD, and Δer for the various mixtures have been fitted by the method of least squares to smoothing equations.

Binuclear oxovanadium(IV) complexes of phthalazine hydrazone ligands

Abstract: The oxovanadium(IV) complexes [(VOSO4·H2O)2L] and [(VO)2L1(μ-SO4)] (L = hydrazone ligands derived from 1,4-dihydrazinophthalazine and benzaldehyde, 4-chlorobenzaldehyde, 4-methoxybenzaldehyde or acetophenone; L 1H2 = hydrazone ligands derived from 1,4-dihydrazinophthalazine and salicylaldehyde, 2-hydroxyacetophenone or 2-hydroxynaphthaldehyde) have been prepared and characterized by elemental analyses, electrical conductance, magnetic moments and spectral data. Reduced magnetic moments are observed for all sulfato-bridged derivatives, indicating antiferromagnetically coupled vanadium(IV) centres. The vanadium(IV) centres appear to have five-coordinated stereochemistries in the systems which involve two metals bound to each ligand. The thermal behaviour of the complexes was investigated by t.g. and d.t.g. techniques. The antifungal and antiviral activities of the hydrazones and their corresponding complexes were also investigated. The screening results have been correlated with the structural features of the tested compounds.