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المؤلفSalih, Isam M.
المؤلفAljaber, Amina S.
المؤلفEltayeb, Mohamed A-Z
المؤلفSulfab, Yousif
تاريخ الإتاحة2024-03-25T06:42:39Z
تاريخ النشر2013
اسم المنشورTransition Metal Chemistry
المصدرScopus
الرقم المعياري الدولي للكتاب3404285
معرّف المصادر الموحدhttp://dx.doi.org/10.1007/s11243-012-9680-6
معرّف المصادر الموحدhttp://hdl.handle.net/10576/53410
الملخصThe kinetics of oxidation of N,N'-ethylenebis(isonitrosoacetyleacetoneimine) copper(II) complex, CuL, by N-bromosuccinimide (SBr) in weakly aqueous acidic solutions was studied under pseudo-first-order conditions. Plots of In (AA) versus time where A and A are absorbance values of the Cu(III) product at time t and infinity, respectively, showed marked deviations from linearity. The curves showed an acceleration of reaction rate consistent with an autocatalytic behavior. In the presence of Hg(II) ions, plots of In(Aco 00 - A) versus time are linear up to >85% of reaction. The value of the observed rate constant, k obs, increases with decreasing pH. At constant reaction conditions, the dependence of the observed rate constants, k obs, is described by Eq. (1). kobs = ko + k1 [H+] The dependence of both kand k 1 on [SBr] is not linear. The mechanism of the title reaction is consistent with an inner sphere mechanism in which a pre-equilibrium step precedes the electron transfer step. The overall rate law is represented by Eq. (2) where [CuIL]t and K 1 represent the total copper(II) complex concentration and the pre- equilibrium formation constant, respectively. d [CuL+]/dt = {(ko+k₁ [H+]) [SBr] [CuL]}/(1 + K₁ [SBr])
اللغةen
الناشرSpringer Nature
الموضوعAqueous acidic solution
Electron-transfer step
Formation constants
Innersphere mechanism
Kinetics of oxidation
N-bromosuccinimide
Pseudo-first-order
Reaction conditions
Copper
Rate constants
Copper compounds
العنوانInner sphere oxidation of N,N′-ethylenebis(isonitrosoacetyleacetoneimine)copper(II) by N-bromosuccinimide in aqueous weakly acidic solutions
النوعArticle
الصفحات213-218
رقم العدد2
رقم المجلد38
dc.accessType Abstract Only


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