Self-assembly of an Unprecedented Cynao-bridged One-dimensional 4f-3d Complex[Nd(DMF)4(H2O)2Cr(CN)6]·nH2O}

Abstract

Abstract: A bimetallic complex {[Nd(DMF)₄(H₂O)₂Cr(CN)₆]·H₂O}_n is reported. It was synthesized as yellow crystals by self-assembly of NdBr₃·6H₂O,H₂ salen and (Bu₄N)₃[Cr(CN)₆](molar ratio of 1∶1∶1) in methanol-DMF mixed solution.Single-crystal X-ray diffraction analysis shows that it consists of a cyano-bridged chain structure. The Nd atom is eight-coordinate with a distorted square antiprism geometry. Each Cr(CN)₆ coordinates to two Nd(Ⅲ) ions using two cis cyanide ligands, while each Nd(DMF)₄(H₂O)₂ group connects two Cr(CN)₆ moieties in a cis fashion, giving rise to an unprecedented chain structure. Crystal data:monoclinic, space group P2₁/c, a=13.200(3), b=12.996(3), c=19.211(4)A°, β＝109.93(3)°, V＝3098.4(11)A°³, Z=4, S=1.012, R1=0.0386, wR=0.0751.

Key words: crystal structure, neodymium(Ⅲ) complex, hexacyanochromate(Ⅲ) complex, cyano-bridge, one-dimension complex

摘要： 报道了一个氰根桥连的4f-3d一维链状配合物［Nd(DMF)₄（H₂O）₂Cr(CN)₆］·H₂O。它是由NdBr₃·6H₂O，H₂salen和(Bu₄N)₃［Cr(CN)₆］(摩尔比为1∶1∶1)在甲醇-DMF混合溶剂中自组装得到。由X-射线单晶衍射结构分析得知其属于单斜晶系，空间群为P2₁/c，晶体数据a=13.200(3), b=12.996(3),c=19.211(4)A°, β=109.93(3)°, V=3098.4(11)A°³, Z=4, S=1.012, R1=0.0386, wR=0.0751。在配合物中，每个Nd离子以顺式方式连接2个Cr离子，而每个Cr离子同样以顺式方式连接2个Nd离子，得到一个新颖的类长城链状结构。配位和晶格水分子通过氢键将相邻的NdCr一维链连成三维网状结构。

关键词: 晶体结构, 钕(Ⅲ)配合物, 六氰合铬(Ⅲ)配合物, 氰桥, 链状配合物

CLC Number:

KOU Huizhong,GAO Song,SUN Baiwang,MA Baoqing. Self-assembly of an Unprecedented Cynao-bridged One-dimensional 4f-3d Complex[Nd(DMF)₄(H₂O)₂Cr(CN)₆]·nH₂O}[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

寇会忠,高松,孙柏旺,马宝清. 一个新颖的氰根桥联的一维4f-3d配合物{［Nd(DMF)₄（H₂O）₂Cr(CN)₆］·nH₂O}_n的自组装[J]. 北京大学学报（自然科学版）.

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Self-assembly of an Unprecedented Cynao-bridged One-dimensional 4f-3d Complex[Nd(DMF)₄(H₂O)₂Cr(CN)₆]·nH₂O}

一个新颖的氰根桥联的一维4f-3d配合物{［Nd(DMF)₄（H₂O）₂Cr(CN)₆］·nH₂O}_n的自组装

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