Synthesis and characterization of N-heterocyclic carbene complexes of uranium(III)

被引：107
|
作者：
Nakai, H [1 ]
Hu, XL [1 ]
Zakharov, LN [1 ]
Rheingold, AL [1 ]
Meyer, K [1 ]
机构：
[1] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA
来源：
INORGANIC CHEMISTRY | 2004年 / 43卷 / 03期
关键词：
D O I：
10.1021/ic035142j
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reaction of [(((Ad)ArO)(3)tacn)U(III)] (1) or [((Me(3)Si)(2)N)(3)U(III)] (3) with tetramethylimidazol-2-ylidene (Me(4)IMC:) yields novel N-heterocyclic carbene complexes [((Ad ArO)(3)tacn)U(III)(Me(4)IMC:)] (2) and [((Me(3)Si)(2)N)(3)U(III)(Me(4)IMC:)] (4). Uranium complexes 2 and 4 represent the first examples of compounds with an N-heterocyclic carbene ligand coordinated to a low-valent uranium center. The paramagnetic complexes 1, 2, and 4 were characterized by (1)H NMR, UV-vis-NIR, and EPR spectroscopy as well as SQUID magnetization measurements and X-ray diffraction analyses. DFT studies indicate a significant degree of pi-bonding in the U(III)-carbene entity.
引用
收藏
页码：855 / 857
页数：3
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