pH Dependent formations of dinuclear molybdenum(V) and incomplete cubane molybdenum(IV) complexes with nitrilotriacetate
Document Type
Article
Publication Date
1-1-2007
Abstract
Nitrilotriacetato oxomolybdenum(V) dinuclear complex (NH4)4[cis-Mo2O4(nta)2] · 7H2O (1) (H3nta = nitrilotriacetic acid) and its incomplete cubane-type trinuclear molybdenum(IV) complex [Mo3O(OH)3(Hnta)3] · Cl · 3H2O (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 β-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 molybdenum(V) complexes based on 13C NMR observations in solution. © 2007 Elsevier B.V. All rights reserved.
Keywords
Molybdate, Nitrilotriacetate, Incomplete cubane cluster, Crystal structure
Divisions
CHEMISTRY
Funders
Ministry of Science and Technology (2005CB221408),National Science Foundation of China (20571061)
Publication Title
Inorganic Chemistry Communications
Volume
10
Issue
12
Publisher
Elsevier