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KMID : 0385520000130060810
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Analytical Science & Technology
2000 Volume.13 No. 6 p.810 ~ p.814
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Synthesis, Protonation Constants and Stability Constants for Transition Metal ions(Ⅱ) of 1, 15-Bis(2-Hydroxybenzyl)-2, 6, 10, 14-Tetraazapentadecane
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김선덕/Kim SD
김준광/이우식/Kim JK/Lee WS
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Abstract
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The open-chain hexadentate N₄, O₂ligands 1, I5-bis(2-hydroxybenzyl)-2, 6, 10, 14-tetraazapentadecane (BSA TPD. 4HCl) has been synthesized as its tetrahydro-chloride salt and characterized by EA, IR, NMR, and Mass spectrum. Its protonation constants (logKn^H) and stability constants (logK_(ML)) for Cu^(2+), Ni^(2+), Co^(2+) and Zn^(2+) ions were determined in aqueous solution by potentiometry and compared with those of analogous N₄, O₂ligands contain ethtylenic spacers or propylenic spacers, which make six-membered chelate rings between the aliphatic nitrogen atoms.
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