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A new pyrimidine-modulated ligand, N2-(pyridin-2-yl)-N6-(pyrimidin-2-yl)pyridine-2,6-diamine (H2pppmda) (1), its mononuclear copper(II) complex [Cu(H2pppmda)(CH3OH)](ClO4)2 (2) and pentanickel metal string complex [Ni5(μ5-pppmda)4Cl2] (3) have been synthesized and structurally characterized. X-ray analysis showed that the free ligand exhibits the syn–anti–syn–syn conformation and intermolecular hydrogen...
A pyrazine-modulated oligo-α-pyridylamine ligand H 3 pzpz and its mononuclear copper(II) and cobalt(II) complexes have been synthesized and structurally characterized. The protonated ligand cation 1 exhibits an anti-anti-anti-anti-syn-anti conformation. H 3 pzpz can be a quadridentate ligand and coordinates to metal atoms with all-anti mode in both copper and cobalt mononuclear complexes...
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