Journal
CRYSTENGCOMM
Volume 7, Issue -, Pages 642-649Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b511825e
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The structures of a series of hydrated complex chlorides [Fe(btp)(2)]Cl-2 center dot 6H(2)O, [M(bpp)(2)]Cl-2 center dot 6.5H(2)O (M = Fe, Ru) and [Ru(terpy)(2)]Cl-2 center dot 6H(2)O 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)]Cl-2 center dot 6H(2)O is high spin while [Fe(bpp)(2)]Cl-2 center dot 6.5H(2)O is low spin, the difference in the average Fe-N distance in the two complexes being 0.24 angstrom. 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.
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