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Reductive Coupling of Xylyl Isocyanide Mediated by Low-Valent Uranium

2021; American Chemical Society; Volume: 40; Issue: 17 Linguagem: Inglês

10.1021/acs.organomet.1c00365

1520-6041

Selena L. Staun, Greggory T. Kent, Alejandra Gómez‐Torres, Guang Wu, Skye Fortier, Trevor W. Hayton,

Coordination Chemistry and Organometallics

The reaction of [U(NR2)3] (R = SiMe3) with 2 equiv of 2,6-dimethylphenyl isocyanide results in the isolation of the U(III) bis(isocyanide) complex [U(NR2)3(CNXyl)2] (1) in 50% yield. Addition of 1 equiv of [Cp*2Co] to 1 results in formation of the isocyanide-coupled U(IV) complex [Cp*2Co][{η2-C,N-(Xyl)NCCN(Xyl)}U(NR2)3] (2), which can be isolated in 45% yield after workup. Complex 2 was characterized by NMR spectroscopy and X-ray crystallography. In the solid state, its acetylenediamide ligand features an η2-N,C binding mode.