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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
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.6, pp.810-814
Kim,
S., Kim,
J., &
Lee,
W.
(2000). Synthesis, Protonation Constants and Stability Constants for Transition Metal ions(II) of 1, 15-Bis(2-Hydroxybenzyl)-2, 6, 10, 14-Tetraazapentadecane. Analytical Science and Technology, 13(6), 810-814.
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Abstract
The open-chain hexadentate <TEX>$N_4$</TEX>, <TEX>$O_2$</TEX> ligands 1, 15-bis(2-hydroxybenzyl)-2, 6, 10, 14-tetraazapentadecane (BSATPD. 4HCl) has been synthesized as its tetrahydro-chloride salt and characterized by EA, IR, NMR, and Mass spectrum. Its protonation constants (<TEX>$logK_n{^H}$</TEX>) and stability constants (<TEX>$logK_{ML}$</TEX>) for <TEX>$Cu^{2+}$</TEX>, <TEX>$Ni^{2+}$</TEX>, <TEX>$Co^{2+}$</TEX> and <TEX>$Zn^{2+}$</TEX> ions were determined in aqueous solution by potentiometry and compared with those of analogous <TEX>$N_4$</TEX>, <TEX>$O_2$</TEX> ligands contain ethtylenic spacers or propylenic spacers, which make six-membered chelate rings between the aliphatic nitrogen atoms.
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- ligand, potentiometry, stability constants
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