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Vinylimidazole coordination modes to Pt and Au metal centers
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-07-03 , DOI: 10.1039/d0nj00845a
Sirpa Jääskeläinen 1, 2, 3, 4 , Igor O. Koshevoy 1, 2, 3, 4 , Sari Suvanto 1, 2, 3, 4 , Tiina Ryhänen 1, 2, 3, 4 , Pipsa Hirva 1, 2, 3, 4
Affiliation  

The coordination modes of 1-vinylimidazole to platinum and gold were studied. Complexes [PtCl3(Hvinylimidazole)]·H2O (1), [Au(vinylimidazole)2]+[AuBr2] (2), [Hvinylimidazole]+[AuCl4] (3), and [Hvinylimidazole]+[AuBr4] (4) were prepared and structurally characterized. Compound 1 is the first structurally characterized transition metal complex containing a protonated vinylimidazole, which is coordinated through the vinyl group in the side-on position. In compound 2, the neutral ligands coordinate through the imidazole nitrogens to the reduced gold(I) center and the charge balancing counter anion [Au(I)Br2] has a short Au–Au contact with the cationic part. In 3 and 4, the acidic reaction conditions lead to the protonation of the imidazole nitrogen and an ion pair with tetrahalogenide gold(III) is obtained. The tendency to the different crystallized products is attributed to the combination of the metal and the halogen properties with the reaction conditions. Computational chemistry was used to explain the preference of the vinyl coordination type, as well as in the interpretation of the spectroscopic details and the nature of the intra- and intermolecular interactions present in the solid state.

中文翻译:

乙烯基咪唑与Pt和Au金属中心的配位模式

研究了1-乙烯基咪唑与铂和金的配位方式。配合物[PtCl 3(乙烯基咪唑)]·H 2 O(1),[Au(乙烯基咪唑)2 ] + [AuBr 2 ] -2),[Hvinylimidazole] + [AuCl 4 ] -3)和[Hvinylimidazole]制备+ [AuBr 4 ] -4)并对其结构进行表征。化合物1是在结构上表征的第一个过渡金属络合物,其中含有质子化的乙烯基咪唑,该质子化的乙烯基咪唑通过侧向位置的乙烯基进行配位。在化合物2中,中性配体通过咪唑氮与还原的金(I)中心配位,电荷平衡抗衡阴离子[Au(I)Br 2 ] -与阳离子部分的Au-Au接触时间短。在34中,酸性反应条件导致咪唑氮和具有四卤化物金的离子对的质子化(III。)。结晶产物不同的趋势归因于金属和卤素性质与反应条件的结合。计算化学用于解释乙烯基配位类型的偏爱,以及用于解释光谱学细节以及固态存在的分子内和分子间相互作用的性质。
更新日期:2020-07-27
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