Detoxifying effect of Nelumbo nucifera and Aegle marmelos on hematological parameters of Common Carp (Cyprinus carpio L.)

The objective of this study was to investigate the efficacy of Nelumbo nucifera and Aegle marmelos on common carp exposed to sub-lethal concentrations of combined heavy metals (5 ppm) under laboratory conditions. The fish were treated with Nelumbo nucifera (500 mg/kg bwt) and Aegle marmelos (500 mg/kgbwt) for 30 days as a dietary supplement. The blood biochemical parameters of the fish were evaluated by analyzing the level of red blood cells (RBC), packed cell volume (PCV), hemoglobin concentration, glucose, cholesterol, iron and copper. The findings of the present investigation showed significant increase in hemoglobin (p<0.001), RBC (p<0.01) and PCV (p<0.01) of herbal drug-treated groups compared with metal-exposed fish. Conversely, glucose and cholesterol level in blood of common carp showed significant reduction compared with heavy-metal-exposed groups. All the values measured in Nelumbo nucifera and Aegle marmelos treated fish were restored comparably to control fish. Our results confirmed that Nelumbo nucifera and Aegle marmelos provide a detoxification mechanism for heavy metals in common carp

Reversible binding of carbon monoxide with Ru(III) aminopolycarboxylic acid complexes

883-885The reversible binding of carbon monoxide to the complexes [RuIII(EDTA-H)(H2O)] 1 and [RUIII(PDTA-H)(H2O)] 2 have been studied in aqueous solution at pH = 5 by spectrophotometric and electrochemical studies. The equilibrium constant for carbonylation, KCO was evaluated at 10°, 25° and 40°C. The thermodynamic parameters, DHᵒ, DGᵒ and DSᵒ for the carbonylation of the complexes 1 and 2 have been evaluated. The complex [Ru(PDTA-H)(CO)] 4 is more stable than the complex [Ru(EDTA-H)(CO)] 3 in solution

New Approaches to Develop Recyclable Catalyst for the Synthesis of Chiral Epoxides

Abstract Chiral epoxides are useful intermediates for the synthesis of various chiral drugs, fine chemicals and chiral building blocks. Chiral epoxides are prepared from their respective non-functionalized olefin precursors using chiral transition metal complexes such as Jacobsen&apos;s Mn(III)salen complexes with various oxidants under homogeneous condition but separation and recycling of the expensive catalyst is problematic making the entire process economically non-viable on an industrial scale. To overcome this problem, the various strategies to make these catalysts recyclable include tuning the solubility of the catalyst by controlling its molecular weight so that catalyst is easily recovered by precipitation in the post epoxidation work-up; heterogenization of the catalyst on an organic and inorganic polymeric support. Besides, enantiomerically pure epoxides can also be achieved by kinetic resolution of inexpensive racemic epoxides by using recyclable hydrolytic kinetic resolution catalyst. These strategies indeed have yielded more efficient catalysts and would be discussed in detail in the present article

Kinetics & Mechanism of Substitution of Pyrrolidine in Dibutyldichloro-bis(pyrrolidine)tin (IV) by Chloride Ion

682-68

Synthesis and characterization of Ru(III) Chiral Schiff base complexes derived from substituted aldehydes and L-histidine

Ruthenium(III) Chiral Schiff base complexes derived from L-histidine with pyridine 2-carboxyaldehyde, 5-methoxy and 5-chloro salicylaldehyde have been synthesized. The complexes were characterised by elemental analysis, IR, UV-visible spectroscopy, conductance measurement, magnetic susceptibility, electrochemical studies, optical rotation and circular dichroism spectra. The conformational aspects regarding the asymmetric arrangement of substituted Schiff base ligands around ruthenium(III) ion have been discussed. All the complexes show an irreversible redox potential in the range -0.36 to -0.40 volts corresponds to Ru(III)/Ru(II) redox couple. In the case of the 5-substituted salicylaldehyde this show linear dependence on Hammet parameter o<SUB>p</SUB>

Synthesis, characterization and solvent dependent reversible binding of carbon monoxide to Ru(III) Schiff base complexes

Ruthenium(III) Schiff base complexes of the composition [RuLXY] where L=Schiff base, viz. bis(salicylaldehyde)-o-phenylenediimine (saloph), bis(salicylaldehyde)ethylenediimine (salen), bis(salicylaldehyde)diethylenetriimine (saldien) bis(picolinaldehyde)-o-phenylenediimine (picoph), bis(picolinaldehyde)ethylenediimine (picen), bis(picolinaldehyde)diethylenetriimine (picdien); X=chloro(Cl<SUP>−</SUP>); Y=chloro(Cl<SUP>−</SUP>), imidazole (Im) or 2-methylimidazole (2-MeIm) were synthesized and characterized by various physicochemical methods. The reversible binding of carbon monoxide to the Ru(III) Schiff base complexes was carried out in DMF, CH<SUB>3</SUB>CN, CH<SUB>3</SUB>OH and CH<SUB>3</SUB>COCH<SUB>3</SUB> at 10, 25 and 40°C. The polarity of the solvents as well as the electron donating subituents on Schiff base complexes increase the affinity of the complexes for CO. The thermodynamic parameters δH°, δG° and δS° for the carbonylation of Schiff base complexes were evaluated

Kinetics & Mechanism of Substitution of Dibutyldichloro-(1,10-phenanthroline)tin(IV) by Chloride Ion

220-22

Complexes of Diorganotin(IV) Dichlorides & Diacetates with Some Nitrogen Heterocyclics

616-61

Ruthenium(III) Schiff base chloro and carbonyl complexes: synthesis, characterization and EPR studies

The synthesis and characterization of stable ruthenium(III) Schiff base chloro and carbonyl complexes with the axial ligands chloro (Cl), imidazole (Im) and 2-methylimidazole (2-MeIm) are reported. The Schiff bases were synthesized by the interaction of naphthaldehyde with amines such as o-phenylenediamine, ethylenediamine, propylenediamine and diethylenetriamine. The geometry around ruthenium in these complexes is psuedooctahedral. The complexes are low-spin 4d5 (S=½) and display characteristic EPR spectra in the powder samples and in frozen solutions at 298 and 77 K. The EPR data and EHMO calculations on model complexes indicate that the dxy orbital lies above dxz and dyz orbitals