首页> 外文期刊>Chemistry: A European journal >Iodinated ortho-Carboranes as Versatile Building Blocks to DesignIntermolecular Interactions in Crystal Lattices
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Iodinated ortho-Carboranes as Versatile Building Blocks to DesignIntermolecular Interactions in Crystal Lattices

机译:碘化邻甲硼烷作为多功能的基石来设计晶格中的分子间相互作用。

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The crystal structures of nu-merous iodinated ortho-carboraneshave been studied, which has revealedthe diversity of intermolecular interac-tions that these substances can adopt inthe solid state. The nature—mostly asit relates to hydrogen andl/or halogenbonds—and relative strength of suchinteractions can be adjusted by selec-tively introducing substituents onto thecluster, thus enabling the rationaldesign of crystal lattices. In this workwe present the newly determined crys-tal structures of the following iodinatedortho-carboranes: 9-I-1,2-c1oso-_C2B_(10)H_(11),4,5,7,8,9,10,11,12-I_8-1,2-closo-C_2B_(10)H_4,c/oso-C2BioH2,1-Me-8,9,10,12-I4-1,2-closo-C2B10H7, 1,2-Me2-8,9,10,12-14-1,2-closo-C2B,H6, and 1,2-Ph2-8,9,10,12-14-1,2-closo-C2B10146. Their 3D supra-molecular organization has been thor-oughly investigated and compared tosimilar previously published crystalstructures. Such a systematic survey hasallowed us to draw some generaltrends. hydrogen bonds(C= cluster carbon atoms) appear tobe significant in the growth of the crys-tal lattices of these compounds, giventhe acidity of hydrogen atoms bondedto C_c, and the polarization of B-Ibonds. These hydrogen bonds can bedisrupted by selectively blocking thepositions next to C, that is, B(3) andB(6), with bulky substituents that pre-vent iodine atoms from approaching ashydrogen acceptors. Halogen bonds ofthe type B-I…I-B are frequently ob-served in most cases, thus suggestingthat these interactions could be attrac-tive in boron clusters. In addition, dif-ferent substituents can be grafted ontothe ortho-carborane surface, therebyproviding further possibilities for ho-momeric or heteromeric molecular as-sembly.
机译:研究了许多碘化邻位甲碳烷的晶体结构,揭示了这些物质在固态下可以采用的分子间相互作用的多样性。这种性质(主要与氢键和/或卤素键有关)可以通过将取代基选择性地引入团簇来调节这种相互作用的相对强度,从而合理设计晶格。在这项工作中,我们介绍了以下碘化邻位碳氢化合物的新确定的晶体结构:9-I-1,2-c10oso-_C2B_(10)H_(11),4,5,7,8,9,10,11 ,12-I_8-1,2-closo-C_2B_(10)H_4,c / oso-C2BioH2,1-Me-8,9,10,12-I4-1,2-closo-C2B10H7,1,2-Me2 -8,9,10,12-14-1,2-closo-C2B,H6和1,2-Ph2-8,9,10,12-14-1,2-closo-C2B10146。他们的3D超分子组织已被彻底研究,并与类似的先前发表的晶体结构进行了比较。这种系统的调查使我们能够得出一些总体趋势。考虑到键合到C_c的氢原子的酸度和B-键的极化,氢键(C =簇碳原子)在这些化合物的晶格生长中似乎很重要。这些氢键可以通过选择性地阻止C旁边的位置(即B(3)和B(6))而被破坏,该取代基具有防止碘原子接近氢受体的庞大取代基。在大多数情况下,经常会观察到B-1 ... I-B型卤素键,因此表明这些相互作用在硼团簇中可能是吸引性的。另外,可以将不同的取代基接枝到邻-碳硼烷表面上,从而为同聚或异聚分子组装提供了更多的可能性。

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