A uranium silyl compound, (Ar[ t Bu]N) 3 USi(SiMe 3 ) 3 ( 1; Ar = 3,5-C 6 H 3 Me 2 ), has been synthesized, isolated, and characterized structurally and theoretically; compound 1 crystallizes in the space group P 3̄ and its U−Si interatomic distance was found to be 3.091(3) Å. Geometry optimizations were carried out for the model systems H 3 EU(NH 2 ) 3 (E = C, Si, Ge, Sn) with a set of reasonable constraints; calculated U−E distances and bond energies are in good accord with experimental data.
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Diaconescu et al. (2001) studied this question.