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- W1983180032 abstract "A series of complexes with the N,N,O-terdentate ligand 6-(2-hydroxyphenyl)-2,2′-bipyridine (HL1) has been prepared and structurally characterised. The complexes are [Ni2L12(dmf)2(H2O)2][BPh4]21(dmf = dimethylformamide), [Cd2L12(HL1)(dmf)2][BPh4]22, [Mn4L16][BPh4]23 and [Mn2L13(MeCN)][PF6]24. In the centrosymmetric complex 1 one ligand L1 is associated with each metal but the phenolates are bridging, giving a NiII2(µ-O)2 core; the remaining two co-ordination sites are occupied by H2O and dmf (O-co-ordinated) ligands. In complex 2 one CdII ion is octahedrally co-ordinated by two ligands L1; the two phenolates bridge to the second CdII, whose co-ordination sphere is completed by two dmf ligands and the two pyridyl donors of another equivalent of HL1, whose pendant phenol remains protonated and forms hydrogen-bonding interactions to lattice solvent molecules. Complex 3 in contrast is an unusual example of a linear chain, with a MnII(µ-O)2MnII(µ-O)2MnII(µ-O)2MnII core (where O denotes a bridging phenolate) and highly distorted six-co-ordinate MnII centres: the chain formation is apparently facilitated by the absence of any stereoelectronic preference for the MnII ions which can readily tolerate the distorted geometries. Complex 4 contains a MnII centre, co-ordinated by two ligands L1, and a MnIII centre which shares two phenolates with the MnII and also has a terdentate L1 and a MeCN ligand to complete the co-ordination sphere. The MnIII centre shows Jahn–Teller elongation along one of the axes. The contributions of factors such as the metal oxidation state, the co-ordination modes available to the ligand, and non-covalent interactions (hydrogen bonding, aromatic π-stacking) to the structures of the complexes are discussed." @default.
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- W1983180032 date "1995-01-01" @default.
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- W1983180032 title "Co-ordination chemistry of mixed pyridine–phenol ligands: polynuclear complexes of 6-(2-hydroxyphenyl)-2,2′-bipyridine with Ni<sup>II</sup>, Cd<sup>II</sup>, Mn<sup>II</sup>and Mn<sup>II</sup>Mn<sup>III</sup>" @default.
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- W1983180032 doi "https://doi.org/10.1039/dt9950003071" @default.
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