Equilibrium study of the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate, 3-mercaptopropionate and 2-mercaptobenzoate

Imre Tóth, László Zékány, E. Brücher

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Equilibrium studies were carried out by pH-potentiometry on the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate (MerAc2-), 3-mercaptopropionate (MerPr2-) and 2-mercaptobenzoate (MerBe2-). It was found that the complex-forming properties of the Al3+ ion towards these mercaptocarboxylic acid ligands differ from those of Ga3+ and Al3+. Under the conditions of the study, Al3+ forms only hydroxo complexes, while Ga3+ and In3+ form relatively stable complexes involving the simultaneous coordination of the carboxylate and the deprotonated mercapto group. In all cases the equilibrium systems can be described without the assumption of polynuclear complexes. The complexes Ga(MerAc)2 and Ga(MerBe)2 show marked stability; this was interpreted in terms of back-coordination and of interaction between the d10 electrons of the Ga3+ ion and the empty d orbitals of the S donor atom. Complexes of composition MLi are not formed in the Ga3+-MerPr2- system; this points to the importan roles of the number of atoms in the chelate ring and the higher stability of the Ga(III)-hydroxo complexes.

Original languageEnglish
Pages (from-to)871-877
Number of pages7
JournalPolyhedron
Volume3
Issue number7
DOIs
Publication statusPublished - 1984

Fingerprint

Gallium
Indium
Aluminum
gallium
indium
Potentiometry
Ions
aluminum
potentiometric analysis
Atoms
chelates
carboxylates
atoms
ions
Ligands
Electrons
orbitals
ligands
acids
Acids

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Equilibrium study of the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate, 3-mercaptopropionate and 2-mercaptobenzoate. / Tóth, Imre; Zékány, László; Brücher, E.

In: Polyhedron, Vol. 3, No. 7, 1984, p. 871-877.

Research output: Contribution to journalArticle

@article{4c084fa4ee7044799f88035da566ab51,
title = "Equilibrium study of the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate, 3-mercaptopropionate and 2-mercaptobenzoate",
abstract = "Equilibrium studies were carried out by pH-potentiometry on the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate (MerAc2-), 3-mercaptopropionate (MerPr2-) and 2-mercaptobenzoate (MerBe2-). It was found that the complex-forming properties of the Al3+ ion towards these mercaptocarboxylic acid ligands differ from those of Ga3+ and Al3+. Under the conditions of the study, Al3+ forms only hydroxo complexes, while Ga3+ and In3+ form relatively stable complexes involving the simultaneous coordination of the carboxylate and the deprotonated mercapto group. In all cases the equilibrium systems can be described without the assumption of polynuclear complexes. The complexes Ga(MerAc)2 and Ga(MerBe)2 show marked stability; this was interpreted in terms of back-coordination and of interaction between the d10 electrons of the Ga3+ ion and the empty d orbitals of the S donor atom. Complexes of composition MLi are not formed in the Ga3+-MerPr2- system; this points to the importan roles of the number of atoms in the chelate ring and the higher stability of the Ga(III)-hydroxo complexes.",
author = "Imre T{\'o}th and L{\'a}szl{\'o} Z{\'e}k{\'a}ny and E. Br{\"u}cher",
year = "1984",
doi = "10.1016/S0277-5387(00)84637-9",
language = "English",
volume = "3",
pages = "871--877",
journal = "Polyhedron",
issn = "0277-5387",
publisher = "Elsevier Limited",
number = "7",

}

TY - JOUR

T1 - Equilibrium study of the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate, 3-mercaptopropionate and 2-mercaptobenzoate

AU - Tóth, Imre

AU - Zékány, László

AU - Brücher, E.

PY - 1984

Y1 - 1984

N2 - Equilibrium studies were carried out by pH-potentiometry on the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate (MerAc2-), 3-mercaptopropionate (MerPr2-) and 2-mercaptobenzoate (MerBe2-). It was found that the complex-forming properties of the Al3+ ion towards these mercaptocarboxylic acid ligands differ from those of Ga3+ and Al3+. Under the conditions of the study, Al3+ forms only hydroxo complexes, while Ga3+ and In3+ form relatively stable complexes involving the simultaneous coordination of the carboxylate and the deprotonated mercapto group. In all cases the equilibrium systems can be described without the assumption of polynuclear complexes. The complexes Ga(MerAc)2 and Ga(MerBe)2 show marked stability; this was interpreted in terms of back-coordination and of interaction between the d10 electrons of the Ga3+ ion and the empty d orbitals of the S donor atom. Complexes of composition MLi are not formed in the Ga3+-MerPr2- system; this points to the importan roles of the number of atoms in the chelate ring and the higher stability of the Ga(III)-hydroxo complexes.

AB - Equilibrium studies were carried out by pH-potentiometry on the systems of aluminium(III), gallium(III) and indium(III) with mercaptoacetate (MerAc2-), 3-mercaptopropionate (MerPr2-) and 2-mercaptobenzoate (MerBe2-). It was found that the complex-forming properties of the Al3+ ion towards these mercaptocarboxylic acid ligands differ from those of Ga3+ and Al3+. Under the conditions of the study, Al3+ forms only hydroxo complexes, while Ga3+ and In3+ form relatively stable complexes involving the simultaneous coordination of the carboxylate and the deprotonated mercapto group. In all cases the equilibrium systems can be described without the assumption of polynuclear complexes. The complexes Ga(MerAc)2 and Ga(MerBe)2 show marked stability; this was interpreted in terms of back-coordination and of interaction between the d10 electrons of the Ga3+ ion and the empty d orbitals of the S donor atom. Complexes of composition MLi are not formed in the Ga3+-MerPr2- system; this points to the importan roles of the number of atoms in the chelate ring and the higher stability of the Ga(III)-hydroxo complexes.

UR - http://www.scopus.com/inward/record.url?scp=0038541550&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038541550&partnerID=8YFLogxK

U2 - 10.1016/S0277-5387(00)84637-9

DO - 10.1016/S0277-5387(00)84637-9

M3 - Article

VL - 3

SP - 871

EP - 877

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

IS - 7

ER -