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Issue 107, 2005

Hydrogen bonding influences on the properties of heavily hydrated chloride salts of iron(II) and ruthenium(II) complexes of 2,6-bis(pyrazol-3-yl)pyridine, 2,6-bis(1,2,4-triazol-3-yl)pyridine and 2,2′∶6′,2″-terpyridine

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Abstract

The structures of a series of hydrated complex chlorides [Fe(btp)2]Cl2·6H2O, [M(bpp)2]Cl2·6.5H2O (M = Fe, Ru) and [Ru(terpy)2]Cl2·6H2O are described (btp = 2,6-bis(1,2,4-triazol-3-yl)pyridine; bpp = 2,6-bis(pyrazol-3-yl)pyridine; terpy = 2,2′∶6′,2″-terpyridine). The ligands are all of the terimine type. [Fe(btp)2]Cl2·6H2O is high spin while [Fe(bpp)2]Cl2·6.5H2O is low spin, the difference in the average Fe–N distance in the two complexes being 0.24 Å. In all four complex salts there is extensive hydrogen bonding between the water and chloride ions. In addition, for the pyrazolyl and triazolyl ligands this involves the uncoordinated >NH groups. The arrangement of the cations in the four lattices is discussed in terms of the previously described “terpy embrace” adopted widely by bis(terimine)metal systems.

Graphical abstract: Hydrogen bonding influences on the properties of heavily hydrated chloride salts of iron(ii) and ruthenium(ii) complexes of 2,6-bis(pyrazol-3-yl)pyridine, 2,6-bis(1,2,4-triazol-3-yl)pyridine and 2,2′∶6′,2″-terpyridine

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Publication details

The article was received on 19 Aug 2005, accepted on 03 Nov 2005 and first published on 14 Nov 2005


Article type: Paper
DOI: 10.1039/B511825E
Citation: CrystEngComm, 2005,7, 642-649
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    Hydrogen bonding influences on the properties of heavily hydrated chloride salts of iron(II) and ruthenium(II) complexes of 2,6-bis(pyrazol-3-yl)pyridine, 2,6-bis(1,2,4-triazol-3-yl)pyridine and 2,2′∶6′,2″-terpyridine

    M. L. Scudder, D. C. Craig and H. A. Goodwin, CrystEngComm, 2005, 7, 642
    DOI: 10.1039/B511825E

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