The X-Ray Structure and Spectroscopic Characterization of [Zn(H2O)6][{Zn(H2O)}2(ttha)]•4H2O (ttha = Triethylenetetraamine-N, N, N′, N", N"′, N"′-hexaacetate)

被引：3

作者：

Carlson, Z. A. ^{[1
]}

Harrod, Bronwyn L. ^{[1
]}

Widener, Daniel ^{[1
]}

Howard, William A. ^{[1
]}

Pang, Keliang ^{[2
]}

机构：

[1] Univ Alaska Fairbanks, Dept Chem & Biochem, Fairbanks, AK 99775 USA

[2] Columbia Univ, Dept Chem, New York, NY 10027 USA

来源：

JOURNAL OF CHEMICAL CRYSTALLOGRAPHY | 2010年 / 40卷 / 10期

基金：

美国国家科学基金会;

关键词：

Zinc; Triethylenetetraaminehexaacetic acid; X-ray structure; Ultraviolet absorption spectroscopy; Transmetallation; AQUEOUS-SOLUTION; METAL COMPLEXES; CRYSTAL;

D O I：

10.1007/s10870-010-9755-1

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

[Zn(H2O)(6)][{Zn(H2O)}(2)(ttha)]center dot 4H(2)O (ttha = tri-ethylenetetraamine- N, N, N', N '', N ''', N '''-hexaacetate) has been structurally characterized (triclinic, P-1, a = 7.4014(4) angstrom, b = 8.5521(4) angstrom, c = 15.0309(7) angstrom, a = 73.582(1)degrees, beta = 85.173(1)degrees, gamma = 69.935(1)degrees; V = 857.15(7) angstrom(3); Z = 1). The two Zn2+ ions bound by the [ttha](-6) ligand are in distorted octahedral environments. While there exists a center of symmetry in the [{Zn(H2O)}(2)(ttha)](2-) anion in the crystalline state, C-13{H-1} NMR spectroscopy demonstrates the absence of a center of symmetry in aqueous solution. Furthermore, electronic absorption spectroscopy reveals that [Zn(H2O)(6)] [{Zn(H2O)}(2)(ttha)]center dot 4H(2)O reacts with vanadyl(IV) acetate in aqueous solution at room temperature to yield [(VO)(2)(ttha)](2-). This reaction implies that Zn2+ can dissociate from [{Zn(H2O)}(2)(ttha)](2-) in aqueous solution.

引用

页码：863 / 866

页数：4

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