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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Structural and spectroscopic studies of some adducts of silver(I) halides with thiourea and N-ethyl substituted thioureas
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Structural and spectroscopic studies of some adducts of silver(I) halides with thiourea and N-ethyl substituted thioureas

机译：卤化银（I）与硫脲和N-乙基取代的硫脲的某些加合物的结构和光谱研究

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摘要

Syntheses, single crystal X-ray structural and spectroscopic characterizations are described for a variety of adducts of silver halides with thiourea ('tu'), N-ethylthiourea ('ettu' = EtNH center dot CS center dot NH2) and N,N'-diethylthiourea ('detu' = EtNH center dot CS center dot EtNH). This study greatly extends our knowledge of the complex chemistry of silver(I) halides with tu. The unexpected diversity of composition of such complexes was initially revealed by the powerful mechanochemical/IR method and the structures of several of the new complexes were determined by X-ray crystallographic studies of samples subsequently prepared from aqueous solution. Structural characterizations provide extensive geometrical data for (mononuclear 1 : 3) [XAg(xtu)(3)] arrays (xtu = ettu, detu; X = Cl, Br, I), assisting vibrational spectroscopic assignments. With the parent tu ligand, binuclear ionic forms are obtained: [tu(2)Ag(mu-tu)(2)Agtu(2)]X-2, the chloride as the dihydrate and the bromide as a di(thiourea) dihydrate adduct. With tu 1 : 2 complexes are defined for X = Cl, Br, as isomorphous one-dimensional polymers; AgCl: tu (1 : 1) is a two-dimensional net with six-membered Ag3S3 rings and terminal chloride. Intermediate stoichiometries are defined in AgBr: tu (2 : 3), a one-dimensional polymer of Ag2S2 rhombs linked at the silver atoms, while [Cl2Ag3(tu)(4)](NO3)center dot H2O is also a one-dimensional polymer in which chloride and thiourea sulfur atoms link six-membered Ag3S3 rings. Diagnostic bands in the IR and far-IR spectra of all of the synthesized complexes are assigned and interpreted in relation to the structures.
机译：描述了各种卤化银与硫脲（'tu'），N-乙基硫脲（'ettu'= EtNH中心点CS中心点NH2）和N，N'的加合物的合成，单晶X射线结构和光谱表征-二乙基硫脲（“ detu” ＝ EtNH中心点CS中心点EtNH）。这项研究大大扩展了我们对卤化银（tu）与tu的复杂化学的认识。最初通过强大的机械化学/ IR方法揭示了此类配合物的意料之外的多样性，并通过对随后从水溶液制备的样品进行了X射线晶体学研究，确定了几种新配合物的结构。结构表征为（单核1：3）[XAg（xtu）（3）]阵列（xtu = ettu，detu; X = Cl，Br，I）提供了广泛的几何数据，有助于振动光谱分配。使用母体tu配体，可获得双核离子形式：[tu（2）Ag（mu-tu）（2）Agtu（2）] X-2，氯化物为二水合物和溴化物为二（硫脲）二水合物加合物。对于tu = 1，2定义为X = Cl，Br的同构一维聚合物。 AgCl：tu（1：1）是具有六元Ag3S3环和末端氯化物的二维网。中间化学计量比定义在AgBr：tu（2：3）中，这是在银原子上连接的Ag2S2菱形的一维聚合物，而[Cl2Ag3（tu）（4）]（NO3）中心点H2O也是一维的氯化物和硫脲硫原子连接六元Ag3S3环的聚合物。所有合成配合物的红外光谱和远红外光谱中的诊断带均根据结构进行分配和解释。

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