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The disproportionation of [Ni(tacn)]2+ in Ni2+ and [Ni(tacn)2]2+ crystallographically demonstrated (tacn = 1,4,7-triazacyclononane).

作者信息

Amendola Valeria, Boiocchi Massimo, Fabbrizzi Luigi, Fusco Nadia, Valeri Elisa

机构信息

Dipartimento di Chimica, Università di Pavia via Taramelli 12, 27100 Pavia, Italy.

出版信息

Chemistry. 2014 Sep 15;20(38):11994-8. doi: 10.1002/chem.201403969. Epub 2014 Aug 26.

DOI:10.1002/chem.201403969
PMID:25155239
Abstract

From an EtOH/H2O solution, 0.3 M each of Ni(2+) and cyclic triamine tacn (2; tacn = 1,4,7-triazacyclononane), after 10 min refluxing and cooling at room temperature, copious and comparable amounts of blue crystals (containing the complex Ni(tacn)(H2O)3) and pink crystals (containing in the same cell both Ni(H2O)6 and Ni(tacn)2) precipitated. This unusual behaviour is ascribed to the fact that at the refluxing temperature the three species are present at the equilibrium in similar concentrations, which are frozen on cooling, due to the inertness of the macrocyclic complexes Ni(tacn)(H2O)3 and Ni(tacn)2.

摘要

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