THE RATES OF WATER EXCHANGE IN AI(III)-SALICYLATE AND AI(III)-SULFOSALICYLATE COMPLEXES - AS MODEL COMPOUNDS WITH FUNCTIONAL GROUPS OF HUMIC ACID
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dc.contributor.author | Sullivan D.J. | |
dc.contributor.author | Nordin J.P. | |
dc.contributor.author | Phillips B.L. | |
dc.contributor.author | Casey W.H. | |
dc.date.accessioned | 2021-01-17T00:09:20Z | |
dc.date.available | 2021-01-17T00:09:20Z | |
dc.date.issued | 1999 | |
dc.identifier | https://elibrary.ru/item.asp?id=157031 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1999, 63, 10, 1471-1480 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23265 | |
dc.description.abstract | Rate parameters are reported for exchange of hydration waters from the inner coordination sphere of Al(III)-sulfosalicylate [Al(sSal)+] and Al(III)-salicylate [Al(Sal)+] complexes to bulk solution as determined with 17O-NMR. The rate parameters for the Al(sSal)+ complex are: kex298 = (3.0 +/- 0.2) . 103 s-1, ΔH# = 37(+/-3) kJ mol-1, ΔS# = -54(+/-9) J mol-1 K-1; and for the Al(Sal)+ complex are: kex298 = 4.9(+/-0.3) . 103 s-1, ΔH# = 35(+/-3) kJ mol-1, ΔS# = -57(+/-11) J mol-1 K-1. These results, along with previous work, suggest that the lability of water molecules in bidentate carboxylate-phenolic complexes scales with the electron-donating properties of the ligand oxygens. Replacement of a coordinated carboxyl with a phenolic group in the ligand increases both the Lewis basicity and the value of kex298. A correlation between these parameters is proposed that can be used to predict rate coefficients for other bidentate aluminum complexes. | |
dc.title | THE RATES OF WATER EXCHANGE IN AI(III)-SALICYLATE AND AI(III)-SULFOSALICYLATE COMPLEXES - AS MODEL COMPOUNDS WITH FUNCTIONAL GROUPS OF HUMIC ACID | |
dc.type | Статья |
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