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Aquation

About: Aquation is a research topic. Over the lifetime, 1443 publications have been published within this topic receiving 17507 citations.


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TL;DR: In this article, the kinetics of substitution of aqua-ligands from above title complex by 1,10-phenanthroline in aqueous medium has been studied spectrophotometrically at different temperatures (40-55 °C).
Abstract: The kinetics of substitution of aqua-ligands from above title complex by 1,10-phenanthroline in aqueous medium has bean studied spectrophotometrically at different temperatures (40–55 °C). The following rate law has been established for the reaction systems at pH 5.6. where L and tap represent 1,10-phenanthroline and 2-(m-tolylazo)pyridine respectively, k1 is the water dissociation rate constant of [Ru(tap)2(H2O)2]2+ (i.e. complex 1), k−1 is the aquation rate constant, and k2 is the ligand capturing rate constant of the penta coordinated intermediate, [Ru(tap)2(H2O)]2+. Ionic strength has a very little effect on the rate constants. The rate increases with the increase in pH in the range of 4.5 to 6.0. Activation parameters (ΔH≠ and ΔS≠) were also calculated. Experimental results are consistent with a dissociative mechanism. The solvent effect study was used to verify the mechanistic conclusion.

1 citations

Journal ArticleDOI
TL;DR: There is kinetic evidence of the formation of [Co(NH 3 ) 5 NCSAg 3 ] 5+ in the interaction of Ag+ with Ag+ in aqueous solution, with pseudo-first-order formation rate constant k = 0.158 s −1 for the forward reaction in the following equation at 25°C and [Ag + ] in the range of 1.23-5.717 as discussed by the authors.

1 citations

Journal ArticleDOI
TL;DR: In this article, the electrophilic behavior of metal bound nitrosyls has been proved by reacting with a bicyclic ketone, camphor, containing an active methylene group and an arylhydrazone with an active methine group.
Abstract: Aquation of blue cis-trans-cis-[RuCl2(β-NaiR)2] (1) leads to the synthesis of solvento species, blue-violet cis-trans-cis-[Ru(OH2)2(β-NaiR)2](ClO4)2 (2), [β-NaiR = C10H7-N=N-C3H2-NN, abbreviated as N,N′-chelator, R = Me] that have been reacted with NaNO2 in warm EtOH resulting in violet dinitro complexes of the type, [Ru(NO2)2(β-NaiR)2] (3). The nitrite complexes are useful synthons of electrophilic nitrosyls, and on triturating the dinitro compounds with cone. HClO4 nitro-nitrosyl derivatives, [Ru(NO2)(NO)(β-NaiR)2]2+ (4) are isolated. The chemical oxidation of aqua complex (2) by excess aqueous eerie solution in 1 (N) H2SO4 leads to the spontaneous formation of a yellow colored species. The electrophilic behaviour of metal bound nitrosyl has been proved by reacting with a bicyclic ketone, camphor, containing an active methylene group and an arylhydrazone with an active methine group. The diazotization of the primary aromatic amines with a strongly electrophilic mononitrosyl complex in acetonotrile and dichloromethane solution was thoroughly studied. Electrocatalytic oxidation of benzyl alcohol was examined.

1 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20232
20226
202111
202010
201914
20187