Structural and theoretical insights into the perturbation of uranium–rhenium bonds by dative Lewis base ancillary ligands
作者:Dipti Patel、David M. King、Benedict M. Gardner、Jonathan McMaster、William Lewis、Alexander J. Blake、Stephen T. Liddle
DOI:10.1039/c0cc01387k
日期:——
Amine-elimination gave the two uraniumârhenium complexes [(TsXy)(THF)nURe(η5-C5H5)2] [TsXy = HC(SiMe2N-3,5-Me2C6H3)3; n = 0 or 1]; structural and theoretical analyses, and comparison to [(TrenTMS)URe(η5-C5H5)2] [TrenTMS = N(CH2CH2NSiMe3)3], reveal an increasing Ï-component to the UâRe bond upon removal of dative ancillary ligands from uranium with the Ï-component remaining essentially invariant.
Uranium(iv) amide and halide derivatives of two tripodal tris(N-arylamido-dimethylsilyl)methanes
作者:Dipti Patel、William Lewis、Alexander J. Blake、Stephen T. Liddle
DOI:10.1039/b926018h
日期:——
with HC(SiMe2Br)3 in the presence of the auxiliary base NEt3 afforded the tripodal tris(N-arylamine-dimethylsilyl)methaneHCSiMe2N(H)Ar}3 (1) in 83% yield. Three-fold deprotonation of 1 with n-butyllithium afforded the corresponding tri-lithium tris(N-arylamido-dimethylsilyl)methane etherate [HCSiMe2N(Li)Ar}3(OEt2)] (2) in 92% yield. Salt elimination reactions between 2 or the known complex [HCSi