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

页码：855 / 857

页数：3

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