Versatility of pyridine-2-methanol as a chelating ligand toward a manganese ion: synthesis and X-ray structural analysis on some manganese-pyridine-2-methanol derivatives

Add time:07/24/2019    Source:sciencedirect.com

A systematic synthesis and X-ray structural analysis have been made for several manganese derivatives with pyridine-2-methanol as a chelating ligand; neutral Mn(C5NH4-2-CH2OH)2(C6F5CO2)2 (1), trans-[Mn(C5H4N-2-CH2-OH)2{C6F4-1,4-(CO2)2}]∞ (2), cis-[Mn(C5H4N-2-CH2-OH)2{C6F4-1,3-(CO2)2}]∞ (3), {Mn(C5H4N-2-CH2-OH)2(4,4′-bipyridine)(ClO4)}∞ (4), and Mn(C5H4N-2-CH2-OH)3(ClO4)2(4,4-azopiridine) (pyridine-2-methanol) (5) are our results. 1 and 5 are monomers, while 2–4 are polymers. An oxidation state of the manganese ion in 1, 2, 3, and 5 is 2+, while that of 4 is suggested to be 3+. The magnetic data of 4 down to 2 K are measured. The length of the linker ligand has been suggested to afford a crucial effect on the dimensionality of the product.

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