Transformation of the bis(trimethylsilyl)methyl into a 1,3-diaza-allyl ligand. Synthesis and crystal structures of [] and [{UCl(μ-Cl)(L)(NR)}2][UCl2(L)(L′)]2[R = SiMe3; Ar = C6Me2-2,5; L = ; L′ = ]
作者： Peter B. Hitchcock , Michael F. Lappert , Dian-Sheng Liu
DOI: 10.1016/0022-328X(94)00035-B
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摘要: Abstract Treatment of LiCHR2 (R=SiMe3) with an excess ArCN (Ar=C6H3Me-2,5) yields the 1,3-diaza-allypotasium compound [K{ N(R)C(Ar)NCC(Ar)CHR }(NCAr)]2, 2, whereas use only two equivalents affords sparingly hydrocarbonsoluble N(R)C(Ar)N C(Ar)CHR)}]n, 1. The reaction uranium (IV) chloride β-diketinimatolithium (LiL)2 (A) leads to mixed valence [{U(VI)}2][U(III)]2 salt [{UCl(μ-Cl)(L)(NR)}2][(L)(L′)]2, 3, containing not [ N(R)C(Ph)C(H)C(Ph)N R]− (L−) but also isomericc 1,3-diaza-allyl N(R)C(Ph) NC(Ph)CHR]− (L′−) ligand. Compounds 1–3 have been identified by microanalysis, 1H NMR spectra, and in case 2 single crystal X-ray diffraction studies.
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