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首页> 外文期刊>Journal of the Chemical Society, Dalton Transactions. Inorganic Chemistry >Novel pyrazolate coordination modes and unusual Tl center dot center dot center dot Tl or Tl-pi-(phenyl) interactions in the crystal structures of [{Tl-3(Ph(2)pz)(3)}(n)], [{Tl-4(Ph(2)pz)(4)}(n)], [{Tl-4(Ph(2)pz)(3)(OH)}(2)] and [{Tl-4(MePhpz)(3)(OH)
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Novel pyrazolate coordination modes and unusual Tl center dot center dot center dot Tl or Tl-pi-(phenyl) interactions in the crystal structures of [{Tl-3(Ph(2)pz)(3)}(n)], [{Tl-4(Ph(2)pz)(4)}(n)], [{Tl-4(Ph(2)pz)(3)(OH)}(2)] and [{Tl-4(MePhpz)(3)(OH)

机译:[{Tl-3(Ph(2)pz)(3)}(n)],[[]的晶体结构中新颖的吡唑酸酯配位模式和异常的Tl中心点中心点中心点Tl或Tl-pi-(苯基)相互作用{Tl-4(Ph(2)pz)(4)}(n)],[{Tl-4(Ph(2)pz)(3)(OH)}(2)]和[{Tl-4( MePhpz)(3)(羟基)

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摘要

Tl(Ph(2)pz)] (Ph(2)pz = 3,5-diphenylpyrazolate) crystallises in two forms. The first from benzene has trinuclear molecules [Tl-3(Ph(2)pz)(3)] 1 linked by intermolecular Tl-pi-eta(6)-Ph contacts. Within 1 the three thallium atoms are different, having coordination numbers of two (but also with the Tl ...eta(6)-Ph contact), three and four, whilst mu-eta(1) : eta(1), mu(3)-eta(1) : eta(2) : eta(1) and (the new) mu(3)-eta(1) : eta(1) : eta(1) modes of Ph(2)pz coordination are observed. Crystallisation of [Tl(Ph(2)pz)] from 1,2-dimethoxyethane (dme) gives tetranuclear molecules [Tl-4(Ph(2)pz)(4)] 2 solvated by dme. Three or four coordinate Tl atoms are observed with mu(3)-eta(1) : eta(2) : eta(1) and mu(3)-eta(1) : eta(1) : eta(1)-pyrazolate coordination. In addition there is an intermolecular Tl-pi-eta(3)-Ph interaction linking the tetranuclear molecules into a polymer, and sundry intramolecular Tl ... C contacts, the most important of which is an unsymmetrical Tl-pi-eta(5)-Ph(2)pz interaction. Crystallisation of [Tl(Ph(2)pz)] or [Tl(MePhpz)] (MePhpz = 3-methyl-5-phenylpyrazolate) from dichloromethane afforded the partially hydrolysed tetranuclear cages [Tl-4(Ph(2)pz)(3)(OH)] 3 or [Tl-4(MePhpz)(3)(OH)] 4, which associate to give a dimer and a polymer respectively owing to Tl ... Tl interactions, supported for the dimer by an intercage distant Tl-pi-eta(5)-Ph(2)pz contact. Complex 3 features three and four coordinate Tl atoms and mu(3)-eta(1) : eta(2) : eta(1) and mu(3)-eta(1) : eta(1) : eta(1)-pyrazolate binding, whilst 4 has three, four and five coordinate thallium atoms and solely mu(3)-eta(1) : eta(2) : eta(1)-pyrazolate ligands. [References: 51
机译:Tl(Ph(2)pz)](Ph(2)pz = 3,5-二苯基吡唑酸酯)以两种形式结晶。第一个来自苯的分子间Tl-pi-eta(6)-Ph接触连接了三核分子[T1-3(Ph(2)pz)(3)] 1。在1范围内,三个th原子是不同的,配位数为2(而且与Tl ... eta(6)-Ph接触),三个和四个,而mu-eta(1):eta(1),mu (3)-eta(1):eta(2):eta(1)和(新的)mu(3)-eta(1):eta(1):eta(1)Ph(2)pz配位模式被观察。从1,2-二甲氧基乙烷(dme)结晶[Tl(Ph(2)pz)]产生的四核分子[T1-4(Ph(2)pz)(4)] 2被dme溶剂化。使用mu(3)-eta(1):eta(2):eta(1)和mu(3)-eta(1):eta(1):eta(1)-吡唑酸盐观察到三个或四个配位T1原子协调。此外,存在分子间Tl-pi-eta(3)-Ph相互作用,将四核分子连接到聚合物中,并且各种分子内Tl ... C接触,其中最重要的是不对称的Tl-pi-eta(5 )-Ph(2)pz相互作用。从二氯甲烷中结晶[Tl(Ph(2)pz)]或[Tl(MePhpz)](MePhpz = 3-甲基-5-苯基吡唑酸酯),得到部分水解的四核笼[Tl-4(Ph(2)pz)( 3)(OH)] 3或[Tl-4(MePhpz)(3)(OH)] 4,它们由于Tl ... T1的相互作用而分别缔合形成二聚体和聚合物,并由中间笼支撑在二聚体上Tl-pi-eta(5)-Ph(2)pz遥距接触。配合物3具有三个和四个坐标T1原子以及mu(3)-eta(1):eta(2):eta(1)和mu(3)-eta(1):eta(1):eta(1)-吡唑酸酯结合,而4具有三个,四个和五个配位th原子,并且仅具有mu(3)-eta(1):eta(2):eta(1)-吡唑酸酯配体。 [参考:51

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