KINETICS OF ISOTOPE EXCHANGE BETWEEN [3-(IODOPHENYL)METHYL]GUANIDINE (METAIODOBENZYLGUANIDINE) AND [I-131] IODIDE

The reaction of isotope exchange between [3-(iodophenyl)methyl]guanidine, mIBG, and [I-131]-iodide in relatively concentrated solutions, in the presence of different ammonium salts, in a closed system, over the temperature range from 130 to 150-degrees-C, has been investigated. The reaction occurs e...

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Veröffentlicht in:	Journal of radioanalytical and nuclear chemistry 1992-04, Vol.158 (1), p.183-191
Hauptverfasser:	TESIC, M, RATKOVIC, M, DONDUR, JANKOV, R
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Chemistry, Analytical Chemistry, Inorganic & Nuclear Exact sciences and technology Inorganic chemistry and origins of life Kinetics and mechanism of reactions Nuclear Science & Technology Physical Sciences Science & Technology Technology
Online-Zugang:	Volltext
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Zusammenfassung:	The reaction of isotope exchange between [3-(iodophenyl)methyl]guanidine, mIBG, and [I-131]-iodide in relatively concentrated solutions, in the presence of different ammonium salts, in a closed system, over the temperature range from 130 to 150-degrees-C, has been investigated. The reaction occurs either with (NH4)2SO4 or CH3COOH, which indicates that the reaction goes through some intermediate stages. Kinetic studies show the influence of the additives. The activation energies for the reaction with (NH4)2SO4/H2O, (NH4)2SO4/CH3COOH and CH3COOH are 121.1, 115.1 and 84.5 kJ . mol-1, respectively.
ISSN:	0236-5731 1588-2780
DOI:	10.1007/BF02034784