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首页> 外文期刊>Zeitschrift fur Naturforschung. A, A journal of physical sciences >An NQR Study of Inclusion Compounds Formed Between Small Chlorine-containing Molecules and bis(N-alkylimidazolidine-2-thione)Cu(Ⅰ) Halide Complexes
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An NQR Study of Inclusion Compounds Formed Between Small Chlorine-containing Molecules and bis(N-alkylimidazolidine-2-thione)Cu(Ⅰ) Halide Complexes

机译：NQR研究含氯小分子与双（N-烷基咪唑烷-2-硫酮）Cu（Ⅰ）卤化物配合物形成的包合物

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摘要

Twenty-five inclusion complexes formed by bis(N-alkylimidazolidine-2-thione)cuprous halides with the small, chlorine-containing guest molecules CCl_4, CHCl_3, CH_2Cl_2, CH_3CCl_3 or C_2H_2Cl_2, have been prepared. Their ~(63)Cu and ~(35)Cl NQR spectra have been measured over the temperature range 77-300 K. For the corresponding bromides the ~(79)Br and/or ~(81)Br spectra have also been investigated. The studies reveal the number and symmetry of different inclusion site. The onset of rapid reorientation of the guest molecules is indicated by the fading out of their NQR signals between 77 and 300 K, whereas the resonances from the host molecules usually persist throughout this temperature range. However, as evidenced by discontinuities in the temperature-dependence of the NQR frequencies of the hosts, sixteen of the complexes show one or more phase-changes in this temperature-range.
机译：已经制备了由双（N-烷基咪唑烷-2-硫酮）卤化物与小的含氯客体分子CCl_4，CHCl_3，CH_2Cl_2，CH_3CCl_3或C_2H_2Cl_2形成的二十五种包合物。在〜77-300 K的温度范围内测量了它们的〜（63）Cu和〜（35）Cl NQR光谱。对于相应的溴化物，还研究了〜（79）Br和/或〜（81）Br光谱。研究揭示了不同夹杂点的数量和对称性。客体分子快速重新定向的开始是通过其NQR信号在77和300 K之间逐渐消失而表明的，而宿主分子的共振通常在此温度范围内持续存在。但是，正如宿主的NQR频率的温度依赖性不连续所证明的那样，其中的16种络合物在此温度范围内显示出一个或多个相变。

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