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Issue 4, 2000
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Synthesis of two covalently linked bis(2,2′∶6′,2′′-terpyridine) (terpy) chelating ligands with different length spacers, comparison of the crystal structures of their mononuclear nickel(II) complexes, and kinetic and mechanistic studies of the reaction of one ligand with [Fe(terpy)2]2+

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Abstract

Two new covalently linked bis(2,2′∶6′,2′′-terpyridine)-chelating hexadentate ligands, 1,3-bis(2,2′∶6′,2′′-terpyridyl-5-ylmethylsulfanyl)propane (L1), and 1,4-bis(2,2′∶6′,2′′-terpyridyl-5-ylmethylsulfanyl)butane (L2), and their six-coordinate mononuclear metal complexes [ML][PF6]2 (M = Fe and Ni; L = L1 and L2) have been prepared and characterised. The X-ray structures of [NiL](PF6)2 (L = L1 and L2) have been compared to establish that L2 has the optimum length of linker to give the least strained mononuclear complex. The marked stability of [ML]2+ is demonstrated by kinetic studies that show that one equivalent of L1 is capable of substituting both 2,2′∶6′,2′′-terpyridine (terpy) ligands of [Fe(terpy)2]2+ to give [FeL1]2+ in a two stage kinetic process.

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Publication details

The article was received on 17 Sep 1999, accepted on 22 Dec 1999 and first published on 01 Feb 2000


Article type: Paper
DOI: 10.1039/A907543G
Citation: J. Chem. Soc., Dalton Trans., 2000,0, 445-449

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    Synthesis of two covalently linked bis(2,2′∶6′,2′′-terpyridine) (terpy) chelating ligands with different length spacers, comparison of the crystal structures of their mononuclear nickel(II) complexes, and kinetic and mechanistic studies of the reaction of one ligand with [Fe(terpy)2]2+

    G. U. Priimov, P. Moore, P. K. Maritim, P. K. Butalanyi and N. W. Alcock, J. Chem. Soc., Dalton Trans., 2000, 0, 445
    DOI: 10.1039/A907543G

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