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Silver(i) complexes of bis- and tris-(pyrazolyl)azine derivatives – dimers, coordination polymers and a pentametallic assembly†‡
Dalton Transactions ( IF 4 ) Pub Date : 2018-03-16 00:00:00 , DOI: 10.1039/c8dt00640g
Izar Capel Berdiell 1, 2, 3, 4 , Stuart L. Warriner 1, 2, 3, 4 , Malcolm A. Halcrow 1, 2, 3, 4
Affiliation  

Silver(I) complexes of 2,4,6-tri(pyrazol-1-yl)pyridine (tpp), 2,4,6-tri(pyrazol-1-yl)pyrimidine (tpym), 2,4,6-tri(pyrazol-1-yl)-1,3,5-triazine (tpt) and 2,4-di(pyrazol-1-yl)-1,3,5-triazine (bpt) are reported. Dinuclear [Ag2(μ-tpp)2(MeCN)2][BF4]2·2MeCN and [Ag2(μ-tpym)2(MeCN)2][BF4]2 are formed from approximately planar [AgL(NCMe)]+ (L = tpp or bpym) centres, which dimerise via apical interactions to the pendant pyrazolyl donor on each ligand. Two polymeric solvatomorph phases [Ag2(μ-tpp)2][BF4]2·nMeNO2 were obtained by crystallising AgBF4 and tpp from nitromethane solution. One is composed of the same dimeric [Ag2(μ-tpp)2]2+ motif as the MeCN solvates, but with semibridging pyrazolyl substitutents replacing the solvent ligands. The other form has helicate [Ag2(μ-tpp)2]2+ dimers linked into chains by unsupported Ag⋯Ag interactions. In contrast, [Ag53-tpym)4][BF4]5·2MeNO2 contains discrete pentametallic assemblies, of a flattened [Ag4(μ-tpym)4]4+ molecular square centred by the fifth silver ion. Three helical or linear 1D coordination polymer topologies are described for [Ag(μ-tpt)]X (X = BF4 or ClO4), where ditopic tpt ligands bind one silver ion in a [2 + 1] geometry and the other in bidentate, [1 + 1] or monodentate fashion. Finally, [Ag(bpt)]BF4 is a polymer of square planar silver ions linked by bis-bidentate bpt ligands. Most of the tpt and bpt structures include short anion⋯π contacts to the ligand triazinyl rings. Electrospray mass spectra confirm the oligomeric nature of the Ag/tpym and tpt complexes in MeNO2 solution.

中文翻译:

双和三(吡唑基)嗪衍生物的 银(i)配合物–二聚体,配位聚合物和五金属组装体

2,4,6-三(吡唑-1-基)吡啶(tpp),2,4,6-三(吡唑-1-基)嘧啶(tpym),2,4,6-的银(I)配合物报道了三(吡唑-1-基)-1,3,5-三嗪(tpt)和2,4-二(吡唑-1-基)-1,3,5-三嗪(bpt)。双核[Ag 2(μ-tpp)2(MeCN)2 ] [BF 4 ] 2 ·2MeCN和[Ag 2(μ-tpym)2(MeCN)2 ] [BF 4 ] 2由近似平面的[AgL( NCMe)] +(L = tpp或bpym)中心,它们通过与每个配体上的吡唑基侧链供体的顶端相互作用而二聚。两个聚合物溶剂化物相[Ag 2通过将AgBF 4和tpp从硝基甲烷溶液中结晶,获得(μ-tpp)2 ] [BF 4 ] 2 · n MeNO 2。一种由与MeCN溶剂化物相同的二聚体[Ag 2(μ-tpp)2 ] 2+基序组成,但用半桥联吡唑基取代基代替溶剂配体。另一种形式是通过不受支持的Ag⋯Ag相互作用将[Ag 2(μ- tpp )2 ] 2+二聚体螺旋连接成链。与此相反,将[Ag 5(μ 3 -tpym)4 ] [BF 4 ] 5 ·2MeNO图2包含以第五个银离子为中心的扁平[Ag 4(μ-tpym) 4 ] 4+分子正方形的离散五金属组件。三个螺旋形或线性1D配位聚合物拓扑用于描述将[Ag(μ-TPT)] X(X - = BF 4 -或C10 4 - ),其中双中心TPT配体结合在[2 + 1]几何一个银离子和另一种是双齿的,[1 + 1]或单齿的。最后,[Ag(bpt)] BF 4是由双双齿bpt配体连接的方形方形银离子的聚合物。大多数的tpt和bpt结构都包含短阴离子π与配体三嗪基环接触。电喷雾质谱证实了MeNO 2溶液中Ag / tpym和tpt配合物的低聚性质。
更新日期:2018-03-16
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