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首页> 外文期刊>Applied Organometallic Chemistry >Endo and exo phenylene-bridged hetero (O,S) silacrown ether rotors including an unexpected structural example of the chloro-methyl exchange rule for 1,4-bis(X2methylsilyl)-benzene, X=Cl, Me~+
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Endo and exo phenylene-bridged hetero (O,S) silacrown ether rotors including an unexpected structural example of the chloro-methyl exchange rule for 1,4-bis(X2methylsilyl)-benzene, X=Cl, Me~+

机译：内和外亚苯基桥杂杂（O，S）杂ac醚转子，包括1,4-双（X2甲基甲硅烷基）-苯的氯甲基交换规则的意外结构示例，X = Cl，Me〜+

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Artificial molecular rotors are of current interest because of the various applications that they could have as materials. However, many of them have the common problem of interdigitation and solvent inclusion in the crystal structure. In this work, we prepare a potential rotor with a stator formed by a sila-hetero(0, S) crown ether moiety and the phenylene bridge as rotator. The use of the sulfur atoms in the stator allows the formation of HB avoiding those common problems. The study of the potential activity as molecular rotors was done via structural analysis by single crystal X-ray diffraction, comparing them with previously reported rotors for which the activation energies have been reported. A comparison between the exo and endo diastereoisomers was done, showing that the change in stereochemistry affects the conformation, making one of them a better rotor. In addition, we found that the crystal structure of the intermediate 1,4-bis(dichloro-methylsilyl)-benzene represents an example of the non-applicability of the so-called chloro-methyl exchange rule, with four groups substituted.
机译：人造分子转子由于其作为材料可能具有的各种应用而受到当前的关注。然而，它们中的许多在晶体结构中具有相互指责和溶剂包含的共同问题。在这项工作中，我们准备了一个潜在的转子，其定子由sila-hetero（0，S）冠醚部分和亚苯基桥作为转子。在定子中使用硫原子可避免形成HB，从而避免了这些常见问题。通过单晶X射线衍射的结构分析，对分子转子的潜在活性进行了研究，并将其与先前报道的已报道了活化能的转子进行了比较。进行了外和非对映异构体之间的比较，表明立体化学的变化会影响构象，使其中之一成为更好的转子。另外，我们发现，中间体1，4-双（二氯甲基甲硅烷基）-苯的晶体结构代表了不适用的所谓的氯甲基交换规则的例子，其中四个基团被取代。

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