DISSOCIATION KINETICS STUDY OF Ce(III) COMPLEXES WITH H8dotp (H8dotp = 1,4,7,10-TETRAAZACYCLODODECANE-1,4,7,10-TETRAKIS(METHYLPHOSPHONIC ACID))

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Authors	SVOBODOVÁ Ivona PISKULA Zbigniew LUBAL Přemysl LIS Stefan HERMANN Petr
Year of publication	2008
Type	Article in Periodical
Magazine / Source	Journal of Alloys and Compounds
MU Faculty or unit	Faculty of Science
Citation
Field	Inorganic chemistry
Keywords	macrocyclic complexes; cyclen derivatives; phosphonate complexes; lanthanide(III) complexes; cerium(III); dissociation kinetics
Description	The dissociation kinetics of cerium(III) complexes with H8dotp (I = 3.0 mol dm-3 (Na,H)ClO4, t = 25 - 60 degrees C) was studied by means of molecular absorption spectroscopy in the UV region. The mechanism of the proton-assisted reaction was proposed, and the activation parameters (Ea = 111 +/- 20 kJ mol-1, delta_H_act = 108 +/- 20 kJ mol-1, delta_S_act = 32 +/- 62 J K-1 mol-1) for the rate-determining step were calculated.
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