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Dependences of rate constants on pressure (in aqueous solution up to 1.25 kbar) are reported for peroxodisulphate oxidation of hexacyanoferrate(TI), tris(2,2'-bipyridyl)iron(II), tris(l,10-phenanthroline)iron(II), bis(l,4,7-triazacyclononane)nickel(II) and bis(l,2-ethanediamine)cysteinatocobalt(III)...
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Rate constants for the aquation of tris(5-nitro-1,10-phenanthroline)iron(II) have been determined in a wide range of binary aqueous mixtures. The results are presented and discussed in terms of correlation diagrams involving the excess molar Gibbs function of mixing for the binary mixtures. The beha...
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A simple method for the preparation of cis-dichloro(1,4,7-triazacyclononane)platinum(II), cis-Pt(tacn)Cl2 is presented, together with the results of screening the compound against the K-562 (leukemia) and SK-OV-3 (ovarian) human cancer cell lines. While the compound shows no activity against K-562 c...
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Solvent effects on the kinetics of peroxodisulphate oxidation of dicyanobis(2,2-bipyridyl)iron(II), [Fe(bipy)2(CN)2], in aqueous methanol have been analysed into initial state and transition state components; the latter dominate the observed reactivity trend.
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The kinetics of oxidation of 1,4,8,11-tetraazacyclotetradecane-5,7-diamidonickel(II) ('nickel dioxocyclam') by peroxodisulfate have been measured in a range of binary aqueous solvent mixtures. Reaction rates are retarded by the presence of organic co-solvents, indicative of destabilization of the tr...
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The kinetic pattern for reaction of [Fe(CN)5(3,5-Me2py)]3? and [Fe(CN)5,(3-CNpy)]3? with a range of incomlng groups, in water and in 40% glycol and 40% t-butyl alcohol, is consistent with the operation of a D mechanism under all the condi...
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The kinetics of oxidation of several nickel(II) tetraazamacrocycles by the peroxydisulphate anion have been studied in water and in binary aqueous mixtures. The reactions proceed via an ion-pairing pre-equilibrium, followed by metal ion-assisted peroxy-bond fissure within the ion-pair solvent shell ...
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Rate laws and rate constants are reported for the two stages of the reactions of [Fe(L?L)2(CN)2](L?L = 1,10-phenanthroline, 5-chloro-1,10-phenanthroline, or 2,2-bipyridyl) with cyanide ion in aqueous solution. The preparation of [Fe(5NO2-phen?CN)2(5NO...
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The binuclear complex bis-(chloropalladium(II))-tetrakis(2-pyridyl)pyrazine chloride, [Pd2Cl2(tppz)]Cl-2 has been synthesized and characterized. The complex shows solvatochromic behaviour in aqueous DMSO solvent mixtures. The kinetics of nucleophilic substitution of the complex by guanine is reporte...
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Preparations of iron(II) complexes of bi-, tri-, quadri-, quinque-, and sexi-dentate Schiff bases are reported. The Schiff-base ligands are derived from pyridine-2-carbaldehyde, phenyl 2-pyridyl ketone, pyridine-2,6-dicarb-aldehyde. or 2,6-diacetylpyridine, and appropriate amines. All these complexe...
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Kinetic data are reported for ring opening of benzocyclobutene-1,2-dione, 3-phenylcyclobutene-1,2-dione, 4-methoxy-3-phenylcyclobutene-1,2-dione, and 3,4-dimethoxycyclobutene-1,2-dione with the zerovalent platinum complexes [Pt(trans-PhCHCHPh)(PPh3)2] and [Pt(PhCCPh)(PPh...
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The kinetics of nucleophilic substitution by cyanide ion at the bis-(2,3,5,6-tetrakis (2-pyridyl)pyrazine)iron(II) cation, [Fe(tppz)(2)](2+) have been measured, and the crystal structure of the product [Fe(tppz)-(CN)(3)](-) anion is reported. The kinetics of oxidation of bath [Fe(tppz)(2)](2+) and [...
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