Thermodynamics for complex formation between palladium(II) and
oxalate

J 2014

Thermodynamics for complex formation between palladium(II) and oxalate

PILNÝ, Radomír, Přemysl LUBAL and Lars Ivar ELDING

Basic information

Original name

Thermodynamics for complex formation between palladium(II) and oxalate

Authors

PILNÝ, Radomír (203 Czech Republic, belonging to the institution), Přemysl LUBAL (203 Czech Republic, guarantor, belonging to the institution) and Lars Ivar ELDING (752 Sweden)

Edition

Dalton Transactions, Royal Society of Chemistry, 2014, 1477-9226

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10402 Inorganic and nuclear chemistry

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 4.197

RIV identification code

RIV/00216224:14310/14:00078301

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1039/c4dt01062k

UT WoS

000339862000016

Keywords in English

palladium(II) ion; oxalate; metal complex formation; thermodynamics

Abstract

V originále

Complex formation between [Pd(H2O)4]2+ and oxalate (ox = C2O42-) has been studied spectrophoto-metrically in aqueous solution at variable temperature, ionic strength and pH. Thermodynamic parameters at 298.2 K and 1.00 M HClO4 ionic medium for the reaction [Pd(H2O)4]2+ + H2ox <-> [Pd(H2O)2(ox)] + H3O+ with equilibrium constant K1,H (in mol.dm-3) are log10K1,H = 3.38 ± 0.08, delta H0 = -33 +/- 3 kJ.mol-1, and deltaS0 = -48 +/- 11 J.K-1.mol-1, as determined from spectrophotometric equilibrium titrations at 15.0, 20.0, 25.0 and 31.0 degrees of Celsius. Thermodynamic overall stability constants Beta_n_0 (in (mol.dm-3)n) for [Pd(H2O)2(ox)] and [Pd(ox)2]2- at zero ionic strength and 298.2 K, defined as the equilibrium constants for the reaction Pd2+ + n ox2- <-> [Pd(ox)n]2-2n (water molecules omitted) are log10Beta_1 = 9.04 ± 0.06 and log10Beta_ = 13.1 +/- 0.3, respectively, calculated by use of Specific Ion Interaction Theory from spectrophotometric titrations with initial hydrogen ion concentrations of 1.00, 0.100 and 0.0100 mol.dm-3 and ionic strengths of 1.00, 2.00 or 3.00 mol.dm-3. The palladium complexes are significantly more stable than oxalato complexes of other divalent metals with higher co-ordination numbers as a result of the chelate effect.

Links

ED1.1.00/02.0068, research and development project

Name: CEITEC - central european institute of technology

Citovat

PILNÝ, Radomír, Přemysl LUBAL and Lars Ivar ELDING. Thermodynamics for complex formation between palladium(II) and oxalate. Dalton Transactions. Royal Society of Chemistry, 2014, vol. 43, No 32, p. 12243-12250. ISSN 1477-9226. Available from: https://dx.doi.org/10.1039/c4dt01062k.

@article{1216445,
   author = {Pilný, Radomír and Lubal, Přemysl and Elding, Lars Ivar},
   article_number = {32},
   doi = {http://dx.doi.org/10.1039/c4dt01062k},
   keywords = {palladium(II) ion; oxalate; metal complex formation; thermodynamics},
   language = {eng},
   issn = {1477-9226},
   journal = {Dalton Transactions},
   title = {Thermodynamics for complex formation between palladium(II) and oxalate},
   url = {http://pubs.rsc.org/en/content/articlelanding/2014/dt/c4dt01062k},
   volume = {43},
   year = {2014}
}

TY  - JOUR
ID  - 1216445
AU  - Pilný, Radomír - Lubal, Přemysl - Elding, Lars Ivar
PY  - 2014
TI  - Thermodynamics for complex formation between palladium(II) and oxalate
JF  - Dalton Transactions
VL  - 43
IS  - 32
SP  - 12243-12250
EP  - 12243-12250
PB  - Royal Society of Chemistry
SN  - 14779226
KW  - palladium(II) ion
KW  - oxalate
KW  - metal complex formation
KW  - thermodynamics
UR  - http://pubs.rsc.org/en/content/articlelanding/2014/dt/c4dt01062k
N2  - Complex formation between [Pd(H2O)4]2+ and oxalate (ox = C2O42-) has been studied spectrophoto-metrically in aqueous solution at variable temperature, ionic strength and pH. Thermodynamic parameters at 298.2 K and 1.00 M HClO4 ionic medium for the reaction [Pd(H2O)4]2+ + H2ox <-> [Pd(H2O)2(ox)] + H3O+ with equilibrium constant K1,H (in mol.dm-3) are log10K1,H = 3.38 ± 0.08, delta H0 = -33 +/- 3 kJ.mol-1, and deltaS0 = -48 +/- 11 J.K-1.mol-1, as determined from spectrophotometric equilibrium titrations at 15.0, 20.0, 25.0 and 31.0 degrees of Celsius. Thermodynamic overall stability constants Beta_n_0 (in (mol.dm-3)n) for [Pd(H2O)2(ox)] and [Pd(ox)2]2- at zero ionic strength and 298.2 K, defined as the equilibrium constants for the reaction Pd2+ + n ox2- <-> [Pd(ox)n]2-2n (water molecules omitted) are log10Beta_1 = 9.04 ± 0.06 and log10Beta_ = 13.1 +/- 0.3, respectively, calculated by use of Specific Ion Interaction Theory from spectrophotometric titrations with initial hydrogen ion concentrations of 1.00, 0.100 and 0.0100 mol.dm-3 and ionic strengths of 1.00, 2.00 or 3.00 mol.dm-3. The palladium complexes are significantly more stable than oxalato complexes of other divalent metals with higher co-ordination numbers as a result of the chelate effect.
ER  -

PILNÝ, Radomír, Přemysl LUBAL and Lars Ivar ELDING. Thermodynamics for complex formation between palladium(II) and oxalate. \textit{Dalton Transactions}. Royal Society of Chemistry, 2014, vol.~43, No~32, p.~12243-12250. ISSN~1477-9226. Available from: https://dx.doi.org/10.1039/c4dt01062k.

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