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Metal-dependent coordination modes displayed by macrocyclic polycarbene ligands

机译:大环聚烯烃配体显示的金属依赖性配位模式

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摘要

Carbene-metal molecular box: Two imidazolium macrocycles, H _2-1(X)_2 and H_4-2(PF_6)_4, act as precursors for the formation of poly(NHC) ligands. The carbene ligands display metal-dependent conformations in forming organometallic complexes. In particular, they are capable of stabilizing boxlike structures such as syn-[Ag_2(1)_2]~(2+) and [Ag_4(2) _2]~(4+) when exposed to linearly coordinated silver cations. In contrast, a monomeric species featuring a C-Pd-C angle of about 90° is formed between 1 and Pd~(II).
机译:碳金属分子盒:两个咪唑鎓大环H 2-1(X)_2和H_4-2(PF_6)_4充当形成聚(NHC)配体的前体。卡宾配体在形成有机金属配合物时显示出金属依赖性构象。特别是,当暴露于线性配位的银阳离子时,它们能够稳定盒状结构,例如syn- [Ag_2(1)_2]〜(2+)和[Ag_4(2)_2]〜(4+)。相反,在1和Pd-(II)之间形成具有约90°的C-Pd-C角的单体物质。

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