کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1313028 975522 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lanthanide complexes of a cross-bridged cyclam ligand: Isolation and structural characterization of unusual trinuclear μ3-imido Yb(III) cluster cations and a mixed valence Yb(II/III) salt containing an Yb(II) anion
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Lanthanide complexes of a cross-bridged cyclam ligand: Isolation and structural characterization of unusual trinuclear μ3-imido Yb(III) cluster cations and a mixed valence Yb(II/III) salt containing an Yb(II) anion
چکیده انگلیسی

The reaction of the cross-bridged cyclam ligand H2CBC with divalent ytterbium precursors, Yb[N(SiMe3)2]2[L]2 (L = THF or Et2O) or Yb(C5Me5)2(OEt2) afforded polymeric [Yb(CBC)]n (1), as the primary product. In addition, the Yb[N(SiMe3)2]2[L]2 reactions also afforded a small amount of an unusual mixed valence salt containing a trinuclear Yb(III) cluster cation featuring a triply bridging NH group and a mononuclear Yb(II) anion, {[Yb(CBC)]3[μ3-NH]}+ {Yb[N(SiMe3)2]3}− (2). A related cluster containing an iodide counterion, {[Yb(CBC)]3[μ3-NH]}+ I− (3), was also isolated in one case. The structures of salts 2 and 3 were determined by X-ray crystallography. Reaction of [Yb(CBC)]n with p-tolyldisulfide, (C6H4MeS)2, produced burgundy crystals of [Yb(CBC)(S-p-C6H4Me)]n (4). The 1H NMR spectra of 2 suggests that the trinuclear cation remains intact in THF-d8 solution.

The reaction of the cross-bridged cyclam ligand H2CBC with Yb[N(SiMe3)2]2[L]2 (L = THF or Et2O) affords polymeric [Yb(CBC)]n (1), as the primary product as well as a small amount of an unusual mixed valence salt {[Yb(CBC)]3[μ3-NH]}+ {Yb[N(SiMe3)2]3}− (2), containing a triply bridging μ3-NH group.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 359, Issue 9, 1 June 2006, Pages 2870–2878
نویسندگان
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