Bipin B. mohapatra

Bio: Bipin B. mohapatra is an academic researcher from Ravenshaw College. The author has contributed to research in topics: Ethyl acetoacetate & Semicarbazone. The author has an hindex of 1, co-authored 1 publications receiving 34 citations.

Iron(III) complexes of some thiosemicarbazones derived from 2-acetylpyridine, its 6-methyl derivative and itsN-oxide

Abstract: A series of iron(III) complexes of thiosemicarbazones derived from 2-acetylpyridine, 6-methyl-2-acetylpyridine and 2-acetylpyridineN-oxide have been prepared from Fe(ClO4)3 and FeCl3. All of the isolated solids have cations involving two monobasic tridentate ligands, and either perchlorate or tetrachloroferrate(III) anions and are 1∶1 electrolytes. Coordinationvia the pyridine nitrogen (or theN-oxide oxygen), the imine nitrogen and the sulphur atom are confirmed by infrared spectra and x-ray diffraction. The presence of two different iron(III) species is indicated by the electron spin resonance spectra of the tetrachloroferrate(III) solids. E.s.r. along with electronic spectra prove the spin-paired configuration of these cationic iron(III) complexes.

Synthesis, characterization and biological activities of some new nickel(II), copper(II), zinc(II) and cadmium(II) complexes of quadridentate SNNS ligands

Abstract: The quadridentate ligands, prepared by condensation ofS-methyl- andS-benzyldithiocarbazate with glyoxal, form stable crystalline complexes of gerferal formula, M(SNNS) (M=NiII, CuII, ZnII and CdII; SNNS−2=ligand dianion). The NiII complexes are diamagnetic but electronic spectral data support a dimeric five-coordinate geometry. Based on magnetic and spectral data, a five-coordinate square-pyramidal structure is also assigned to the copper(II) complexes. The ZnII and CdII complexes are polymeric and octahedral. The Schiff bases and metal complexes display good antifungal and antibacterial properties.

Nickel(II) complexes of a thiosemicarbazone prepared from 2-Acetylpyridine

Abstract: The ligand 3-azabicyclo[3.2.2]nonane-3-thiocarboxylic acid 2-[1-(2-pyridinyl)ethylidene]hydrazide (HL), which is observed in an unusual tautomeric form in the solid state, and its selenium analogue (HLSe) have been used to prepare a series of nickel(II) complexes. Compounds of the general formula [NiLX] (X=Cl, Br, NCS, N3, NO2 or NCSe) as well as [Ni(LSe)Cl] have been found to be diamagnetic, planar complexes. A single crystal study of [NiL(NCS)] shows the deprotonated ligand bound in a tridentate mannervia its pyridyl nitrogen, imine nitrogen and the thione sulphur atom with the nitrogen atom of the thiocyanato-ligand occupying the fourth coordination position. The solids prepared from the nickel(II) salts having tetrafluoroborate, nitrate and iodide ions approximate to octahedral symmetry and have neutral HL ligands coordinated in a bidentate fashionvia the pyridine and imine nitrogens with the remaining coordination sites being occupied by the anions or water molecules. The [NiL2] solid is also octahedral with the two deprotonated ligands bonding as tridentate groupsvia the same atoms as in the [NiLX] complexes.