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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A chiral [2]catenane self-assembled from meso-macrocycles of palladium(II)
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A chiral [2]catenane self-assembled from meso-macrocycles of palladium(II)

机译:由钯(II)的介观大环自组装的手性[2]环烷

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摘要

Reaction of trans-[PdX2(SMe2)(2)] (X = Cl or Br) with the chiral ligand LL = 1,1-binaphthyl-2,2'-(NHC( = O)-3-C5H4N) 2 gave the [2]catenane complexes trans-[{(PdX2)(2)(mu-LL)(2)}(2)], which are formed by self-assembly from 4 units each of trans-PdX2 and LL. The catenation is favored by the formation of multiple hydrogen bonds between the constituent macrocycles (4 x NH...ClPd, 2 x NH...O=C). If the ligand LL is racemic, each macrocycle trans-[ (PdX2)(2)(mu-LL)(2)] is formed in the meso form trans-[(PdX2)(2)(mu-R-LL)(mu-S-LL)] but the resulting [2]catenane is chiral as a direct result of the catenation step. This is the first time that this form of chiral [2]catenane has been observed. The enantiomers of the [2]catenane further self-assemble in the crystalline form, through secondary intermolecular Pd...X bonding, to form a racemic infinite supramolecular polymer of [2]catenanes.
机译:反式-[PdX2(SMe2)(2)](X = Cl或Br)与手性配体LL = 1,1-双萘基-2,2'-(NHC(= O)-3-C5H4N)2的反应[2] catenane配合物反式-[{((PdX2)(2)(mu-LL)(2)}(2)],由反式-PdX2和LL各自由4个单元自组装而成。通过在组成的大环之间形成多个氢键(4 x NH ... ClPd,2 x NH ... O = C)促进串联反应。如果配体LL是外消旋的,则每个大环反式[[(PdX2)(2)(mu-LL)(2)]以内消旋形式形成反式[[(PdX2)(2)(mu-R-LL)( mu-S-LL)],但是作为连接步骤的直接结果,所得的[2]环烷是手性的。这是首次观察到这种形式的手性[2]环戊烷。 [2] catenane的对映体通过次级分子间Pd ... X键进一步以结晶形式自组装,形成[2] catenanes的外消旋无限超分子聚合物。

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