Author
S.K. Dua
Bio: S.K. Dua is an academic researcher from Meerut College. The author has contributed to research in topics: Salicylaldehyde & Ligand field theory. The author has an hindex of 6, co-authored 6 publications receiving 160 citations.
Papers
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TL;DR: In this article, the dimeric nature of the complexes is revealed by infrared spectra which show that two monomeric units, each having square-pyramidal stereochemistry, are stacked together through phenolic oxygen acting as bridges.
38 citations
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TL;DR: In this paper, the oxovanadium(IV) complexes of the hydrazones derived from benzoylhydrazine and salicylaldehyde (BSH), o-hydroxyacetophenone (BAH), O-hydroxpropi-paramphenone (BPH), BPH, o-hexhexine (BBH) and 2 -hydroxy-1-naphthaldehyde (BNH) have been described.
34 citations
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TL;DR: In this article, the five and six-coordinate dimeric manganese(III) and cobalt (III) complexes derived from benzhydrazide and salicylaldehyde (BSH), 0-hydroxyacetophenone(BAH), o-hydroxpropiophenone (BPH), ohydroxybutyrophenone (BBH) and 2-hydoxy-1-naphthaldehyde(BNH) having the general formulae [Mn(L)X]2 and [Co(L)(OH)H2
Abstract: The five- and six-coordinate dimeric manganese(III) and cobalt(III) complexes derived from benzhydrazide and salicylaldehyde(BSH), 0-hydroxyacetophenone(BAH), o-hydroxypropiophenone(BPH), o-hydroxybutyrophenone (BBH) and 2-hydroxy-1-naphthaldehyde(BNH) having the general formulae [Mn(L)X]2 and [Co(L)(OH)H2O]2 (X = Cl, Br or CH3 COO) are described. These complexes have been characterised by elemental analyses and by conductance, molecular weight, magnetic, electronic and infrared spectral measurements. The complexes of Mn(III) involve phenolic oxygen, while in Co(III) complexes hydroxyl groups are present as bridges between metal atoms as revealed by i.r. spectra. Each unit of dimeric Mn(III) complexes possesses distorted square-pyramidal shape and anions are present on the axial position. The ν(Mn-X) values are consistent with penta-coordinate stereochemistry. These complexes have subnormal magnetic moments (3.40–3.52 BM) explained in terms of antiferromagnetic exchange coupling between two adjac...
34 citations
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TL;DR: In this paper, the preparation and properties of a series of V(II), Co(II) and Ni (II) complexes of the composition [M(L2)(X2)] X (where L = AEP; X = Cl, Br, I) and (L = AHMC, D(AHP)S, X = H2O, NH3) are reported.
28 citations
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TL;DR: In this article, the synthesis and characterisation of Zn(II), Cd(II) and Hg(II)-complexes of benzoyl hydrazones derived from aldehydes and ketones are described.
14 citations
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TL;DR: Copper(II) complexes of the antitumour ligand salicylaldehyde benzoylhydrazone (H2sb) have been prepared in the presence of strong acids.
155 citations
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TL;DR: In this paper, the ternary copper(II) complexes of the ligand salicylaldehyde acetylhydrazone (H2L) have been obtained and the crystal and molecular structures of these complexes have been determined by a range of physicochemical techniques.
92 citations
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TL;DR: The polymeric diorganotin/hydroxamato complexes a containing the long carbon chain butyl ligands are the most active ones, and the dependence of the antitumor activity of the complexes on various factors, namely the nuclearity, the organic ligand, the type, position and number of the X ring substituents is also discussed.
80 citations
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TL;DR: In this paper, a review of the chemistry of hydroxo-bridged chromium(III), cobalt(III) and rhodium-III complexes is presented.
Abstract: Publisher Summary Polynuclear complexes with hydroxide (or oxide) as bridging ligands constitute an important class of complexes. They are formed by hydrolysis of mononuclear aqua complexes of most metal ions and, therefore, constitute an important aspect of the hydrolytic chemistry of metal ions. They display a chemistry which is interesting and is also relevant in relation to applied chemistry and to biochemistry. This chapter reviews the chemistry of hydroxo-bridged chromium(III), cobalt(III) complexes, and includes studies of the related rhodium(III) and iridium(III)systems. The review focuses the chemical properties of these complexes, and special emphasis has been made on reactions that involve the cleavage or formation of a hydroxo bridge. Reactions of bridging groups other than hydroxide and reactions of nonbridging ligands are also discussed in the chapter. A large number of X-ray crystal-structure determinations have been made during the past two decades. The hydroxo-bridged chromium(III) oligomers constitute a very interesting class of complexes from a spectroscopic and magnetochemical point of view. The most important methods for obtaining structural information about solutions are probably potentiometric pH measurements and visible/ultraviolet spectroscopy, but many other techniques have been applied, including bridge-cleavage experiments, magnetic measurements, and electron spin resonance (ESR) spectroscopy.
79 citations
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TL;DR: A series of new organotin(IV) complexes of the types R2SnL, R is Me (1), Ph (2), o-Cl-C6H4CH2 (3); and [R3SnL]∞, R = n-Bu (4) (H2L = 2-hydroxy-1-naphthaldehyde 5-chloro-2-hydroxbenzoylhydrazone) have been synthesized and structurally characterized by means of elemental analysis, FT-IR, UV-vis spectroscopy,
77 citations