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首页> 外文期刊>Inorganica Chimica Acta >Lanthanide complexes of a cross-bridged cyclam ligand: Isolation and structural characterization of unusual trinuclear mu(3)-imido Yb(III) cluster cations and a mixed valence Yb(II/III) salt containing an Yb(II) anion
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Lanthanide complexes of a cross-bridged cyclam ligand: Isolation and structural characterization of unusual trinuclear mu(3)-imido Yb(III) cluster cations and a mixed valence Yb(II/III) salt containing an Yb(II) anion

机译:交叉桥接旋风环的镧系元素:异常三核μ(3)-imido Yb(III)簇的分离和结构表征,含有Yb(II)阴离子的混合价Yb(II / III)盐

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摘要

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) [mu(3)-NH]}(+) {Yb[N(SiMe3)(2)](3)}(-) (2). A related cluster containing an iodide counterion, {[Yb(CBC)](3)[mu(3)-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 H-1 NMR spectra of 2 suggests that the trinuclear cation remains intact in THF-d(8) solution. (c) 2005 Elsevier B.V. All rights reserved.
机译:交叉桥循环配体H2CBC与二价镱前体的反应,Yb [n(SIME3)(2)](2)[L](2)(L = THF或ET 2 O)或Yb(C5ME5)(2)( OET2)提供聚合物[Yb(CBC)](N)(N)(1),作为初级产物。 另外,Yb [n(SIME3)(2)](2)[L](2)反应还得到少量含有三核YB(III)簇的异常混合价盐,其具有三级桥接NH组 和单核Yb(II)阴离子,{[Yb(CBC)](3)[亩(3)-NH]}(+){YB [n(SIME3)(2)](3)}( - )( 2)。 含有碘化物抗衡离子的相关簇,{[Yb(CBC)](3)[亩(3)-NH]}(+)I-(3),在一种情况下也被隔离。 通过X射线晶体学确定盐2和3的结构。 [Yb(CBC)](N)与对甲苯二甲酸二硫化物(C6H4ME)(2)的反应,产生的[Yb(CBC)S-P-C6H4ME)(N)(4)产生的勃艮第晶体](4)。 H-1 NMR光谱的表明,ThF-D(8)溶液中的三核阳离子保持完整。 (c)2005年Elsevier B.v.保留所有权利。

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