- Biological evolution of titanium(IV) complex [{(NNO)2Ti}3O3] bearing bidentate heteroditopic Schiff base ligand: Synthesis, structure and biological studies
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Titanium(IV)-complex of chemical composition [{(NNO)2Ti}3O3] (2) bearing bidentate heteroditopic Schiff base [(C5H4OH)-N=CHC4H3-NH] (L1) ligand in titanium coordination sphere was reported and its biological significance was evaluated. The in vitro cytoto
- Kottalanka, Ravi K.,Pagadala, Eswar,Loke, Shiva K.,Rajkumar, S. Rex Jeya,Srinivasadesikan, Venkatesan,Ramchandran, Balajee
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- Spectroscopic characterization and biological activity of Zn(II), Cd(II), Sn(II) and Pb(II) complexes with Schiff base derived from pyrrole-2-carboxaldehyde and 2-amino phenol
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A new Schiff base 2-aminophenol-pyrrole-2-carboxaldehyde and its Zn(II), Cd(II), Sn(II) and Pb(II) complexes have been synthesized and characterized by various physicochemical studies. Spectral studies (IR and 1H NMR) indicate deprotonation and
- Singh, Bibhesh K.,Prakash, Anant,Rajour, Hemant K.,Bhojak, Narendar,Adhikari, Devjani
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- NLO active CuII/RuII and CdII/RuII coordination-organometallic complexes: synthesis, structural characterization and photoluminescence properties
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CuII/RuII and CdII/RuII hybrid complexes [Cu(L1–3)(NC5H4C≡CRu(dppe)2Cl)] (1a-3a) and [Cd(L1-3)(NC5H4C≡CRu(dppe)2Cl)] (1b–3b
- Bharate,Chavan
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p. 3436 - 3446
(2016/10/18)
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- Comparison of chelating ability of NO-, NS-, ONS-, and ONO-type Schiff base derivatives and their stability constants of Bis-complexes with copper(II)
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The present study includes important findings relating to the number of donor atoms, species of ligands, and stabilities of complexes. Stabilities of complexes between Cu(II) ion and NO-, NS-, ONS-, and ONO-type Schiff bases were compared. Acid-base properties of the Schiff bases were explained at 25 ± 0.1 ° C and ionic strength (I) of 0.1 M supported by NaCl. The Hyperquad computer program was used for calculation of dissociation and stability constants. The overall stability constants of their Cu(II) complexes were calculated and the various formed complexes between the Schiff bases with Cu(II) ion formulated as CuL2, CuHL2, CuH2L 2, and CuH-1L2(Cu (OH) L2). The complexes of ONS- and ONO-type tridentate ligands were more stable than those of NO- and NS-type bidentate ligands. TUeBITAK.
- Atabey, Hasan,Findik, Esra,Sari, Hayati,Ceylan, Mustafa
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p. 109 - 120
(2014/02/14)
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- Development of an efficient ruthenium catalyzed synthetic process and mechanism for the facile conversion of benzothiazoles to orthanilic acids
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Ruthenium-Schiff base complex catalyzed efficient protocol has been developed for the synthesis of orthanilic acids from benzothiazoles in good to excellent yields using N-haloamines. Hexa-coordinated ruthenium complex with Schiff base and triphenylphosphine ligands has been prepared and its catalytic function was invented for the synthesis of orthanilic acids. The synthetic process utilizes our efficient method for the selective and preferential oxidation of thiazole ring of benzothiazoles using N-haloamines without effecting phenyl ring. The detailed catalytic, mechanistic and kinetic investigations have been made for the synthetic reactions. Solvent isotope studies have been made in H2O-D2O and the reactions were carried out at different temperatures. Under the identical set of conditions, the kinetics of catalyzed reactions has been compared with uncatalyzed reactions and found that the catalyzed reactions are 9-11 folds faster. The catalytic constants (KC) have been calculated for each N-haloamine at different temperatures and the values of activation parameters with respect to the catalyst have been evaluated. Spectroscopic evidence for the formation of 1:1 complex between N-haloamine and ruthenium has been obtained. The observed results have been explained by a plausible mechanism and the related rate law has been deduced.
- Jagadeesh,Karthikeyan,Nithya,Sandhya, Y. Sree,Reddy, S. Sudhaker,Reddy, P. Pradeep Kumar,Kumar, M. Vinod,Charan, K.T. Prabhu,Narender,Bhagat
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experimental part
p. 99 - 107
(2010/12/18)
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- POLYMERISATION OF ETHYLENE AND ALPHA-OLEFINS WITH PYRROLIMINOPHENOL COMPLEXES.
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The present invention relates to the field of single site catalyst systems based on pyrrol-iminophenol, pyrrol-iminoalcohol or pyrrol-iminoamine complexes and suitable for oligomerising or homo- or co-polymerising ethylene and alpha-olefins.
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Page/Page column 8-9
(2008/12/05)
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- STUDIES ON METAL COMLEXES OF 2-(o-HYDROXYPHENYLIMINOMETHYL)THIOPHENE AND 2-(o-HYDROXYPHENYLIMINOMETHYL)PYRROLE
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The synthesis of Zn, Cd and Ni complexes of Schiff bases 2-(o-hydroxyphenyliminomethyl)thiophene and 2-(o-hydroxyphenyliminomethyl)pyrrole is described.The nature, composition and structure of the isolated solid complexes have been elucidated by elemental
- Capitan, Fermin,Molina, Francisca,Espinosa, Pedro,Capitan-Vallvey, Luis Fermin
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p. 373 - 376
(2007/10/02)
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