Macrocyclic dinuclear Zn(II) complexes:: synthesis, structure and hydrolysis of tris(p-nitrophenyl) phosphate

被引：40

作者：

Kong, DY ^{[1
]}

Martell, AE ^{[1
]}

Reibenspies, J ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA

来源：

INORGANICA CHIMICA ACTA | 2002年 / 333卷 / 01期

关键词：

dinuclear Zn complexes; trisphosphate ester; hydrolysis; structures; synthesis;

D O I：

10.1016/S0020-1693(02)00704-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of mono- and dinuclear zinc complexes of 3,6,9,17,20,23-hexaaza-29,30-dihydroxy-13,27-dimethyl-tricyclo[23,3,1(11,15)]triaconta-1(28),11,13,15(30),25,26-hexaene (H2L or BDBPH) have been defined in solution by potentiometry. The crystal structure of [Zn2C26H40N6O2(CH3OH)(2)].Br-2 has been determined by X-ray. Each zinc ion is coordinated to three nitrogen atoms, a bridged-phenolic oxygen atom, and a methanolic oxygen atom, which define a six-coordinated octahedron. Bond lengths of Zn-N are in the range of 2.104(3)-2.120(3) Angstrom and distances between Zn and O (bridged-phenolic oxygen) are 2.052(2), 2.062(2) Angstrom, respectively. The dinuclear complexes: [Zn2L](2+) and [Zn2L(OH)](+) play crucial roles in hydrolytic reaction of tris(4-nitrophenyl)phosphate. A possible mechanism showed that [Zn2L(OH)](+) acts as a nucleophile and [Zn2L](2+) stabilizes the formation of the intermediate: [Zn2L-BNP]. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：7 / 14

页数：8

共 28 条

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