Pasgreta E, Puchta R, Zahl A, van Eldik R (2007)
Publication Type: Journal article, Original article
Publication year: 2007
Original Authors: Pasgreta E., Puchta R., Zahl A., Van Eldik R.
Publisher: Wiley-VCH Verlag
Pages Range: 3067-3076
Journal Issue: 19
Kinetic studies on Li exchange between the cryptands C222 and C221 and acetone as solvent were performed as a function of ligand-to-metal ratio, temperature and pressure using Li NMR spectroscopy. Temperature and pressure dependence measurements were performed in the presence of an excess of Li. The rate and activation parameters for the exchange process are: C222: k = (1.7 ± 0.5) × 10 s, ΔH = 24 ± 1 kJ mol and ΔS# = -105 ± 4 J K mol; C221: k = 2.24 ± 0.09 s, ΔH# = 29 ± 2 kJ mol and ΔS# = -141 ± 5 J K mol. The influence of pressure on the exchange rate is insignificant for both ligands, such that the activation volume is around zero within the experimental error limits. The reported activation parameters suggest that the exchange of Li between solvated and chelated ions follows an associative interchange mechanism. © Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
APA:
Pasgreta, E., Puchta, R., Zahl, A., & van Eldik, R. (2007). Ligand exchange processes on solvated lithium cations: Complexation by cryptands in acetone as solvent. European Journal of Inorganic Chemistry, 19, 3067-3076. https://doi.org/10.1002/ejic.200601169
MLA:
Pasgreta, Ewa, et al. "Ligand exchange processes on solvated lithium cations: Complexation by cryptands in acetone as solvent." European Journal of Inorganic Chemistry 19 (2007): 3067-3076.
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