Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Novel complexes of Mn(III) with macrocylic porphine ligand and ethylenediamine

Abstract: The present work describes the synthesis and characterization of a few Mn(III) porphyrins with ethylenediamine. A new series of high-spin Mn(III) porphyrins having general formula [Mn(TMPP)X] and [Mn(TMPP)X(en)], where TMPP = tetra-p-methoxyphenylporphinato ligand, X = Cl−, Br−, or NCS− and en = ethylenediamine. Molar conductance values of these complexes show their non-electrolytes in ethyl alcohol. These complexes have been characterized by U.V., I.R., ESI-mass spectra, elemental analyses and magnetic susceptibility measurements. The tentative structures have also been proposed.

Acute toxicity of azadirachtin to a teleost, Heteropneustes fossilis

Abstract: The acute static renewal test of a botanical pesticide - azadirachtin for the freshwater catfish, Heteropneustes fossilis has been performed to determine the LC50 values at different exposure period. The LC50 values at various exposure periods are 173.06 mg L -1 for 24h; 80.69 mg L -1 for 48h; 58.57 mg L -1 for 72h and 52.35 mg L -1 for 96h. The upper confidence limits were 196.87, 86.91, 79.20 and 70.04 mg L -1 for 24, 48, 72 and 96 h and lower confidence limits were 154.01, 74.24, 37.33 and 33.83 mg L -1 , respectively. These results indicate that azadirachtin exposure to the fish caused toxic effects.

Reactions of Cp2MCl2 (M=Ti or Zr) with Imine-Oxime Ligands. Formation of Metallacycles

Abstract: The reactions of bis(cyclopentadienyl)titanium(IV)/zirconium(IV) dichloride with a series of imine-oxime ligands (LH 2 ), derived by condensing benzil-α-monoxime and 2-phenylenediamine, 4-phenylenediamine, 4-methyl-2-phenylenediamine, 2,6-diamino-pyridine, have been studied in anhydrous tetrahydrofuran in the presence of base and metallocycles of the [Cp 2 M(L)] (M=Ti or Zr) type have been isolated. Tentative structures have been proposed for the products based on elemental analysis, electrical conductance and spectral (electronic, IR and 1 H-NMR) data. Proton NMR spectra indicate that on the NMR time scale there is rapid rotation of the cyclopentadienyl ring around the metal-ring axis at 25oC. Studies were conducted to assess the growth inhibiting potential of the complexes synthesized and the ligands against various bacterial strains. Keywords: Titanium(IV), zirconium(IV), imine-oxime, IR, PMR, antibacterial activity Introduction Derivatives of the bent metallocene complexes of Group IV metals have attracted increasing attention because they are applied in a variety of asymmetric catalytic and stoichiometric reactions [1-6]. Perhaps the most important application of these complexes is in the isotactic polymerization of propylene. The introduction of modifications to the classical ligands is a very effective way of varying the physical and chemical properties of the parent metallocenes over a very wide range in order to incorporate novel reactivity and optimize existing properties [1]. In continuation of our earlier studies [7-16] on the coordination behaviour of new type of ligands towards Cp