Standardizzazione per lo studio dell'effetto Broensted della reazione di $Co(NH_3)_5Cl++$ con Hg++ e HgCl++

Crisponi, G. and Dejak, C. and Mazzei Lalatta, I. (1974) Standardizzazione per lo studio dell'effetto Broensted della reazione di $Co(NH_3)_5Cl++$ con Hg++ e HgCl++. Accademia Peloritana dei Pericolanti, Classe di Scienze FF. MM. NN., LIV. pp. 143-152.

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Abstract

A kinetic study of the Hg(II)X catalyzed acquation of the complex $RCIY_2$ $(R = Co(NH_3)_5; X, Y = ClO_4-, NO_3-)$ has been carried out.
A reaction mechanism involving two consecutive and competitive reactions RCI++ + Hg++ -> $RH_2O+++$ + HgCl+; RCI++ + HgCl+ -> $RH_2O+++$ + $HgCl_2$, with velocities of the same order, and the equilibrium 2HgCl++ $\rightleftharpoons \ $ Hg++ + $HgCl_2$ is proposed. A method of evaluation of the relative rate constants is developed:
the expression of the ratio complex transformed/time is obtained as a polynomial of 8th order in time by series integgration of the differential equation rapresenting the reaction system and the kinetic constants are determined, that give the best fitting of the polynomial to experimental data.
The difference in the values of the constants for the reactionas with X = Y = $ClO_4-$, X = Y = $NO_3-$, X = $ClO_4-$ and Y = $NO_3-$ is significant, and trying a first interpretation of this phenomenon it is shown that, for the study of the kinetic salt effect, the reaction with perclorates of the cations (reagents and of the added salts) are the most suitable.

Item Type:	Article
Subjects:	M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali > 1974 M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Lettere Filosofia e belle Arti > 1974
Depositing User:	Dr A F
Date Deposited:	31 Oct 2012 10:59
Last Modified:	31 Oct 2012 10:59
URI:	http://cab.unime.it/mus/id/eprint/1651

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