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Bis-qtpy (qtpy = 2,2‘:6‘,2‘ ‘:6‘ ‘,2‘ ‘‘-quaterpyridine) Metal Complexes, [M(qtpy)2]2+

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Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via del Risorgimento 35, I-56126 Pisa, Italy
Cite this: Inorg. Chem. 2004, 43, 17, 5459–5465
Publication Date (Web):July 27, 2004
Copyright © 2004 American Chemical Society

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    Reactions of perchlorates of iron(II), nickel(II), and zinc(II) with 2,2‘:6‘,2‘ ‘:6‘ ‘,2‘ ‘‘-quaterpyridine (qtpy) gave the first crystallographically established bis-qtpy metal complexes of formula [M(qtpy)2][ClO4]2 (M = Fe, Ni, Zn). Coordination of two terdentate quaterpyridines to the same center produces a distorted octahedron of six nitrogen atoms around the metal, leaving two pendant pyridyl groups, one for each quaterpyridine. For the diamagnetic zinc system, an NMR investigation has been carried out in order to establish the conditions to obtain the intermediate mono-qtpy complex, of formula [Zn(qtpy)(H2O)2][ClO4]2, which has also been crystallographically established. The corresponding hexafluorophosphate derivatives [M(qtpy)2][PF6]2 (M = Ni and Zn) were prepared in DMF at room temperature.

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    Crystallographic data in CIF format for [Zn(qtpy)2][ClO4]2·4H2O, [Ni(qtpy)2][ClO4]2·4H2O, and [Zn(qtpy)(H2O)2][ClO4]2 have been deposited with the Cambridge Crystallographic Data Centre, Cambridge, United Kingdom (CCDC−No. 233815, 233814 and 233813). This material is available free of charge via the Internet at

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