STUDIES OF POLYFUNCTIONAL O-LIGANDS - FORMATION AND STABILITY OF MG2+ AND CA2+ COMPLEXES OF 1,2,4,5-BENZENETETRACARBOXYLIC ACID IN AQUEOUS-SOLUTION AT 25-DEGREES

被引：18

作者：

DEROBERTIS, A

DESTEFANO, C

机构：

[1] Istituto di Chimica Analitica dell'Università, Salita Sperone 31, P.O. Box 30, I-98166 S. Agata di Messina, Messina

来源：

TALANTA | 1991年 / 38卷 / 04期

关键词：

D O I：

10.1016/0039-9140(91)80083-C

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The stabilities of the Ca2+ and Mg2+ complexes with 1,2,4,5-benzenetetracarboxylic acid (pyromellitic acid) were studied potentiometrically, at 25-degrees. The species ML, MHL, MH2L, and M2L [L = pyromellitate4-; M = Ca2+, Mg2+] were found to be present in solution (for Mg2+ the species MH3L was also found). The dependence of the formation constants on ionic strength, and the stability trends of the Ca2+ and Mg2+ complexes with carboxylate ligands, are discussed.

引用

页码：439 / 444

页数：6

共 26 条

[1]

AMICO P, 1982, ANN CHIM-ROME, V72, P1

[2]

[Anonymous], 1964, SPECIAL PUBLICATION

[3] COMPLEXING ABILITY OF PESTICIDES AND RELATED-COMPOUNDS - THERMODYNAMIC PARAMETERS FOR THE FORMATION OF H+, NA+ AND CA2+ COMPLEXES WITH 2,4-DICHLOROPHENOXYACETATE IN AQUEOUS-SOLUTION AT DIFFERENT TEMPERATURES AND IONIC STRENGTHS [J].

CASALE, A ;

DEROBERTIS, A ;

DESTEFANO, C .

THERMOCHIMICA ACTA, 1988, 128 :261-266

[4]

CASALE A, 1988, ANN CHIM-ROME, V78, P249

[5]

CURINI R, IN PRESS THERMOCHIM

[6]

Daniele P. G., 1990, J CHEM RES S, V300, P2316

[7]

DANIELE PG, 1990, ANN CHIM-ROME, V80, P177

[8] ON THE POSSIBILITY OF DETERMINING THE THERMODYNAMIC PARAMETERS FOR THE FORMATION OF WEAK COMPLEXES USING A SIMPLE-MODEL FOR THE DEPENDENCE ON IONIC-STRENGTH OF ACTIVITY-COEFFICIENTS - NA+, K+, AND CA-2+ COMPLEXES OF LOW-MOLECULAR WEIGHT LIGANDS IN AQUEOUS-SOLUTION [J].

DANIELE, PG ;

DEROBERTIS, A ;

DESTEFANO, C ;

SAMMARTANO, S ;

RIGANO, C .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1985, (11) :2353-2361

[9]

DCESTEFANO C, 1989, COMPUT CHEM, V13, P343

[10] THE CALCULATION OF EQUILIBRIUM CONCENTRATIONS IN LARGE MULTIMETAL MULTILIGAND SYSTEMS [J].

DEROBERTIS, A ;

DESTEFANO, C ;

SAMMARTANO, S ;

RIGANO, C .

ANALYTICA CHIMICA ACTA, 1986, 191 :385-398

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