pH Dependent formations of dinuclear molybdenum(V) and incomplete cubane molybdenum(IV) complexes with nitrilotriacetate

被引：10
|
作者：
Zhou, Zhao-Hui [1 ,2 ]
Xu, Qin [1 ,2 ]
Lin, Jin [1 ,2 ]
Ng, Seik-Weng [3 ]
机构：
[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China
[2] Xiamen Univ, State Key Lab Phys Chem Solid Sufaces, Xiamen 361005, Peoples R China
[3] Univ Malaya, Dept Chem, Kuala Lumpur 50603, Malaysia
来源：
INORGANIC CHEMISTRY COMMUNICATIONS | 2007年 / 10卷 / 12期
基金：
中国国家自然科学基金;
关键词：
molybdate; nitrilotriacetate; incomplete cubane cluster; crystal structure;
D O I：
10.1016/j.inoche.2007.09.006
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Nitrilotriacetato oxomolybdenum(V) dinuclear complex (NH4)(4)[cis-Mo2O4(nta)(2)] center dot 7H(2)O (1) (H(3)nta = nitrilotriacetic acid) and its incomplete cubane-type trinuclear molybdenum(IV) complex [Mo3O(OH)(3)(Hnta)(3)] center dot Cl center dot 3H(2)O (2) are isolated in a weak acidic and an acidic solutions, respectively (pH 4.5 and 1.0). The nitrilotriacetate ligand in the anion 1 or the cation 2 displays tridentate mode through the nitrogen atom and the oxygen atoms of beta-carboxy groups. Unusual protonations of bridged oxygen atoms in 2 have not effect on the skeleton of molybdenum(IV) cap Mo3O unit. There are obvious dissociations of molybdenurn(V) complexes based on C-13 NMR observations in solution. (c) 2007 Elsevier B.V. All rights reserved.
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页码：1461 / 1464
页数：4
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