期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 130, 期 10, 页码 2930-2931出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja7107454
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Addition of 1 and 2 equiv of ArNCO (Ar=Ph, 2,4,6-Me3C6H2) to U(NtBu)(2)(I)(2)(OPPh3)(2) yields the aryl-imido complexes U(NAr)(NtBu)(I)(2)(OPPh3)(2) and U(NAr)(2)(I)(2)(OPPh3)(2), respectively. Unlike analogous transition metal reactions this imido exchange reaction does not proceed through a metal oxo intermediate. Density functional theory calculations and 15N-labeling studies suggest this transformation involves the [2 + 2] cycloaddition of the aryl isocyanate C=N bond across the U=N imido ligand to form an N,N-bound ureato intermediate.
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