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Synthesis of N-(4-Salicylideneiminoaryl) monoaza Crown Ethers and Dioxygen Affinities of Their Cobalt (II) Complexes

✍ Scribed by Zeng Wei; Li Hong-Bo; Wei Xing-Yao; Qin Sheng-Ying; Xiang Rui-Li

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
386 KB
Volume
21
Category
Article
ISSN
0256-7660

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✦ Synopsis

Abstract

The Schiff base‐containing pendant monoaza crown ether HL^1^, HL^2^, HL^3^ and HL^4^ have been synthesized by condensation of salicylaldehyde with N‐(4‐aminoaryl) monoaza crown ethers, which were prepared conveniently from 4‐nitro‐N, N‐di(hydroxyethyl) aniline or 4‐nitrobenzyl chloride via cyclization or condensation and reduction. The structures of HL^1^—HL^4^ were verified by ^1^H NMR, IR spectra, MS and elemental analysis. Moreover, the oxygenation constants (KO2) and thermodynamic parameters (δ__H__^0^ and δS^0^) of their cobalt(II) complexes were determined in the range of −5 °C to 25 °C, and the effect of crown ring bonded to a Schiff base on the dioxygen affinities of cobalt(II) complexes was also observed as compared to the uncrowned analogue (CoL).

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