Studies on Relaxation Kinetics of Coordination Reaction Between Yttrium and 2-(4'-Chloro-2'-phosphono-phenyIazo)-7-(2',6'-dibromo-4'-chloro-phenylazo)-1,8-dihydroxy-3,6-naphthalene Disulfonic Acid

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (9): 1245.

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Studies on Relaxation Kinetics of Coordination Reaction Between Yttrium and 2-(4'-Chloro-2'-phosphono-phenyIazo)-7-(2',6'-dibromo-4'-chloro-phenylazo)-1,8-dihydroxy-3,6-naphthalene Disulfonic Acid

AN Cong-Jun, FANG Xian-An, LIN Zhi-Xin, ZENG Fu-Sheng

Department of Chemistry, Wuhan University, Wuhan, 430072

Received:1991-09-16 Online:1992-09-24 Published:1992-09-24

Abstract

Abstract: In this paper,the relaxation time was determined at different temperatures by the concentration jump relaxation method.The expression of l/t was derived from the assumed mechanism of reaction.The apparent rate constant and molecular absorbance index were obtained by the concentration-jump relaxation method.The arrhemus activation energy is 52.82 kJ/mol and the activation enthalpy is 50.43 kJ/mol.The activation entropy is a negative in the range of 278～K298 K.The stability constant of complex is 13.84.These experimental results are in agreement with those obtained by using other methods.

Key words: Coordination reaction, Relaxation kinetics, Yttrium

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AN Cong-Jun, FANG Xian-An, LIN Zhi-Xin, ZENG Fu-Sheng. Studies on Relaxation Kinetics of Coordination Reaction Between Yttrium and 2-(4'-Chloro-2'-phosphono-phenyIazo)-7-(2',6'-dibromo-4'-chloro-phenylazo)-1,8-dihydroxy-3,6-naphthalene Disulfonic Acid[J]. Chem. J. Chinese Universities, 1992, 13(9): 1245.

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Studies on Relaxation Kinetics of Coordination Reaction Between Yttrium and 2-(4'-Chloro-2'-phosphono-phenyIazo)-7-(2',6'-dibromo-4'-chloro-phenylazo)-1,8-dihydroxy-3,6-naphthalene Disulfonic Acid

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