Health & Environmental Research Online (HERO)


Print Feedback Export to File
853732 
Journal Article 
A new tripodal ligand system with steric and electronic modularity for uranium coordination chemistry 
Bart, SC; Heinemann, FW; Anthon, C; Hauser, C; Meyer, K 
2009 
Yes 
Inorganic Chemistry
ISSN: 0020-1669
EISSN: 1520-510X 
48 
19 
9419-9426 
English 
19739633 
WOS:000270091000048 
The synthesis of a potentially redox active tripodal ligand containing a tris(aryloxide) functionalized mesitylene anchor, (((tBu)ArOH)(3)mes) (1), and its metalation with low-valent uranium to form [(((tBu)ArO)(3)mes)U] (1-U) is reported. The results from characterization by X-ray crystallography, spectroscopic studies, and computational analysis, as well as initial reactivity studies, support a +3 uranium oxidation state. Comparison to the previously synthesized complex, [(((tBu)ArO)(3)tacn)U] (2-U), featuring the redox-innocent triazacyclononane anchor reveals that changing the anchor from the flexible triazacyclononane to a rigid mesityl fragment increases the structural flexibility of the aryloxide substituents in complexes of 1. The synthesis and crystal structures of uranium(IV) amide complexes of 1-U and 2-U are discussed.