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Kumar D.,National Institute of Technology Kurukshetra | Dass D.,Shri Krishan Institute of Engineering and Technology
Journal of the Indian Chemical Society | Year: 2010

A dioxane solution of N-(2-mercaptoethyl)-3-carboxy-2- hydroxybenzylideneimine, LH3 (I) on reacting with chloroacetyl chloride in the presence of triethylamine, undergoes cyclizatlon to form N-(2-mercaptoethyl)-4-(3′-carboxy-2′-hydroxyphenyl)-2-azetidinone, L′H3 (II). A MeOH solution of L′H3 reacts with MnII, CoII, NiII, CuII, Zn II, CdII, ZrIV, MoO2 2+ and UO2 2+ ions to form the complexes [M(L′H).MeOH] 2 (where M = MnII, CoII or NiII), [Cu(L′H)]2, [M′(L′H)] (where M′ = Zn II, CdII, MoO2 2+ or UO 2 2+) and [Zr(OH)2(L′H)]2. The compounds have been characterized on the basis of elemental analyses, molar conductance, molecular weight, spectral (IR, UV-Visible) studies and magnetic susceptibility measurements. L′H3 behaves as a dibasic tridentate OON donor ligand in [Cu(L′H)]2, while it acts as a dibasic tetradentate OONS donor ligand in rest of the compounds. The complexes [M(L′H).MeOH]2 (where M = MnII, CoII or NiII), [Cu(L′H)]2 and [Zr(OH)2(L′H) ]2 are dimers, and the complexes [M′(L′H)] (where M′ = ZnII, CdII, MoO2 2+ or UO2 2+) are monomers. The dimeric complex [Cu(L′H)]2 exhibits subnormal magnetic moment and is involved in antiferromagnetic exchange, while all other complexes are magnetically dilute. The octahedral structure for MnII, CoII, Ni II, MoO2 2+ and UO2 2+ complexes, square planar structure for CuII complex, tetrahedral structure for ZnII and CdII complexes, and pentagonal bipyramidal structure for ZrIV complex have been suggested. Source


Kumar D.,National Institute of Technology Kurukshetra | Dass D.,Shri Krishan Institute of Engineering and Technology
Bulletin of the Chemical Society of Ethiopia | Year: 2014

The reaction between polystyrene 3-formylsalicylate and furoic acid hydrazide in DMF in the presence of ethyl acetate results in the formation of polystyrene N-(2-carbamoylfuranyl)-3'-carboxy-2'- hydroxybenzylideneimine (I). A benzene suspension of I reacts with mercaptoacetic acid and forms the polystyrene N-(2-carbamoylfuranyl)-C-(3'-carboxy-2'-hydroxyphenyl)thiazolidin-4- one, PSCH2-LH2 (II). A DMF suspension of II reacts with Mn(II), Ni(II), Cd(II), Fe(III) and UO2(VI) ions and forms the polystyrene-anchored coordination compounds of the types, [PSCH 2-LMn(DMF)3], [PSCH2-LNi(DMF)3], [PSCH2-LCd(DMF)], [PSCH2-LH2FeCl3] and [PSCH2-LHUO2(NO3)(DMF)]. The polystyrene-anchored coordination compounds have been characterized on the basis of elemental analyses, spectral (IR, reflectance) studies and magnetic susceptibility measurements. II acts as a neutral tridentate ONO donor ligand in [PSCH2-LH2FeCl3], a monobasic tridentate ONO donor ligand in [PSCH2-LHUO2(NO3)(DMF)], a dibasic tridentate ONO donor ligand in [PSCH2-LMn(DMF)3], [PSCH2-LNi(DMF)3] and [PSCH2-LCd(DMF)]. A tetrahedral structure for Cd(II) and an octahedral structure for Mn(II), Ni(II), Fe(III) and a square-antiprism geometry for UO2(VI) complex are suggested. © 2014 Chemical Society of Ethiopia. Source


Kumar D.,National Institute of Technology Kurukshetra | Dass D.,Shri Krishan Institute of Engineering and Technology
Bulgarian Chemical Communications | Year: 2014

A new thiazolidinone, N-(2-hydroxymethylphenyl)-C-(3′-carboxy- 2′-hydroxyphenyl)thiazolidin-4-one, LH3 (I) has been synthesized by the cyclization of a dry benzene solution of the Schiff base, N-(2- hydroxymethylphenyl)-3′-carboxy-2′-hydroxybenzylideneimine with mercaptoacetic acid. A methanolic solution of I reacts with Mn(II), Cu(II), Zn(II), Fe(III) and MoO2(VI) ions and forms the coordination compounds, [Mn(LH)(MeOH)3], [M′(LH)(MeOH)] [here M′ = Cu (II), Zn(II), MoO2(VI)] and [FeCl(LH)(MeOH)2]. All the coordination compounds are monomeric in nature. The coordination compounds have been characterized on the basis of elemental analyses, molar conductance, molecular weight, spectral (IR, NMR, reflectance, ESR) studies and magnetic susceptibility measurements. I behaves as a dibasic tridentate OOS donor ligand in these compounds. The compounds are non-electrolytes (AM = 6.1-13.5 mho cm2 mol-1) in DMF. A square-planar structure for [Cu(LH)(MeOH)], a tetrahedral structure for [Zn(LH)(MeOH)] and an octahedral structure for the remaining compounds are suggested. The compounds were screened for antimicrobial activity. © 2014 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria. Source


Rani S.,Shri Krishan Institute of Engineering and Technology | Lal J.,Markanda National College Shahbad | Singh N.,Kurukshetra University
International Journal of Optics | Year: 2011

We investigate theoretically the generation of squeezed states in spontaneous and stimulated six-wave mixing process quantum mechanically. It has been found that squeezing occurs in field amplitude, amplitude-squared, amplitude-cubed, and fourth power of field amplitude of fundamental mode in the process. It is found to be dependent on coupling parameter g (characteristics of higher-order susceptibility tensor) and phase values of the field amplitude under short-time approximation. Six-wave mixing is a process which involves absorption of three pump photons and emission of two probe photons of the same frequency and a signal photon of different frequency. It is shown that squeezing is greater in a stimulated interaction than the corresponding squeezing in spontaneous process. The degree of squeezing depends upon the photon number in first and higher orders of field amplitude. We study the statistical behaviour of quantum field in the fundamental mode and found it to be sub-Poissonian in nature. The signal-to-noise ratio has been studied in different orders. It is found that signal-to-noise ratio is higher in lower orders. This study when supplemented with experimental observations offers possibility of improving performance of many optical devices and optical communication networks. Copyright © 2011 Sunil Rani et al. Source


Kumar D.,National Institute of Technology Kurukshetra | Dass D.,Shri Krishan Institute of Engineering and Technology
International Journal of ChemTech Research | Year: 2015

Polystyrene 3-formylsalicylate and 2-Aminobenzylalcohol in DMF in the presence of ethyl acetate reacts together to form the polystyrene N-(2-hydroxymethylphenyl)-2'-hydroxybenzylideneimine-3'-carboxylate (I). A benzene suspension of I reacts with mercaptoacetic acid undergoes cyclization and forms polystyrene N-(2-hydroxymethyl phenyl)-C-(3'-carboxy-2'-hydroxyphenyl)thiazolidin-4-one, PSCH2–LH2 (II). A DMF suspension of II reacts with Zn(II), Cu(II) and Zr(OH)2(IV) ions and forms the corresponding polystyrene-anchored coordination compounds, [PSCH2–LHZn(OAc)(DMF)] (III), [PSCH2–LHCu(OAc)(DMF)] (IV) and [PSCH2–LHZr(OH)3(DMF)2] (V) respectively. The polystyrene-anchored coordination compounds have been characterized on the basis of elemental analyses, spectral (IR, reflectance, ESR) studies and magnetic susceptibility measurements. II acts as a monobasic bidentate OS donor ligand in all the coordination compounds. The acetato groups behave as monodentate ligand in all the compounds. A tetrahedral structure for III, a square-planar structure for IV and an octahedral structure for V are suggested. © 2015, International Journal of ChemTech Research. All right reserved. Source

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