Characterisation of gallium(III)-acetate complexes in aqueous solution: A potentiometric, EXAFS, IR and molecular orbital modelling study
(2002) In Journal of the Chemical Society. Dalton Transactions p.2559-2564- Abstract
- The aqueous gallium(III)-acetate system was studied in 0.6 M Na(Cl) at 25 degreesC using a multi-technique approach, including potentiometry, IR spectroscopy, EXAFS spectroscopy and molecular orbital calculations. The potentiometric data were satisfactorily explained by a model which includes one mononuclear and one binuclear complex. The corresponding equilibrium constants defined according to the reactions Ga3+ + HAc reversible arrow GaAc2+ + H+ 2Ga(3+) + HAc + 2H(2)O reversible arrow Ga-2(OH)(2)Ac3+ + 3H(+) are log beta(-1,1,1) = -2.08 +/- 0.09 and log beta(-3,2,1) = -5.65 +/- 0.06, respectively. The latter complex has a stoichiometry identical to that previously identified in the aluminium(III)-acetate system. Also in agreement with... (More)
- The aqueous gallium(III)-acetate system was studied in 0.6 M Na(Cl) at 25 degreesC using a multi-technique approach, including potentiometry, IR spectroscopy, EXAFS spectroscopy and molecular orbital calculations. The potentiometric data were satisfactorily explained by a model which includes one mononuclear and one binuclear complex. The corresponding equilibrium constants defined according to the reactions Ga3+ + HAc reversible arrow GaAc2+ + H+ 2Ga(3+) + HAc + 2H(2)O reversible arrow Ga-2(OH)(2)Ac3+ + 3H(+) are log beta(-1,1,1) = -2.08 +/- 0.09 and log beta(-3,2,1) = -5.65 +/- 0.06, respectively. The latter complex has a stoichiometry identical to that previously identified in the aluminium(III)-acetate system. Also in agreement with this system, the IR and EXAFS data strongly indicates that this complex consists of two edge-sharing Ga octahedra bridged with an acetate ion, and should be formulated [Ga-2 (mu-OH)(2) (mu-O2CCH3)](3+). This interpretation is further supported by the molcular orbital calculations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4332575
- author
- Clausen, M. ; Ohman, L. O. ; Kubicki, J. D. and Persson, Per LU
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Chemical Society. Dalton Transactions
- pages
- 2559 - 2564
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:0036017280
- ISSN
- 1472-7773
- DOI
- 10.1039/B111408E
- language
- English
- LU publication?
- no
- additional info
- 12
- id
- 43140303-0004-42f2-94a3-a699de4f9c61 (old id 4332575)
- date added to LUP
- 2016-04-01 16:01:43
- date last changed
- 2022-01-28 08:49:43
@article{43140303-0004-42f2-94a3-a699de4f9c61, abstract = {{The aqueous gallium(III)-acetate system was studied in 0.6 M Na(Cl) at 25 degreesC using a multi-technique approach, including potentiometry, IR spectroscopy, EXAFS spectroscopy and molecular orbital calculations. The potentiometric data were satisfactorily explained by a model which includes one mononuclear and one binuclear complex. The corresponding equilibrium constants defined according to the reactions Ga3+ + HAc reversible arrow GaAc2+ + H+ 2Ga(3+) + HAc + 2H(2)O reversible arrow Ga-2(OH)(2)Ac3+ + 3H(+) are log beta(-1,1,1) = -2.08 +/- 0.09 and log beta(-3,2,1) = -5.65 +/- 0.06, respectively. The latter complex has a stoichiometry identical to that previously identified in the aluminium(III)-acetate system. Also in agreement with this system, the IR and EXAFS data strongly indicates that this complex consists of two edge-sharing Ga octahedra bridged with an acetate ion, and should be formulated [Ga-2 (mu-OH)(2) (mu-O2CCH3)](3+). This interpretation is further supported by the molcular orbital calculations.}}, author = {{Clausen, M. and Ohman, L. O. and Kubicki, J. D. and Persson, Per}}, issn = {{1472-7773}}, language = {{eng}}, pages = {{2559--2564}}, publisher = {{Royal Society of Chemistry}}, series = {{Journal of the Chemical Society. Dalton Transactions}}, title = {{Characterisation of gallium(III)-acetate complexes in aqueous solution: A potentiometric, EXAFS, IR and molecular orbital modelling study}}, url = {{http://dx.doi.org/10.1039/B111408E}}, doi = {{10.1039/B111408E}}, year = {{2002}}, }