A comparative study of crystal structures and inclusion properties of fluorinated triazines

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• 作者：Katharina Reichenbaecher ; Helen Stoeckli-Evans ; Edwin Weber and Juerg Hulliger
• 关键词：Fluorine compounds ; Triazines ; Inclusions ; Host– ; guest compounds ; Fluorine interactions
• 刊名：Journal of Fluorine Chemistry
• 出版年：2006
• 出版时间：February 2006
• 年：2006
• 卷：127
• 期：2
• 页码：270-276
• 全文大小：344 K

文摘

Three perfluorinated host compounds of the triazine type, namely 2,4,6-tris(pentafluorophenoxy)-1,3,5-triazine (1), 2,4,6-tris(pentafluorothiophenoxy)-1,3,5-triazine (2) and 2,4,6-tris(pentafluorophenamin)-1,3,5-triazine (3), were synthesized differing only in the linking heteroatom (O, S and NH) between the triazine core and the pentafluorophenyl groups. The crystal structures involving compounds 1, 2 and their inclusion compounds are dominated by a variety of fluorine interactions (phenyl-perfluorophenyl, C–HF, FF, C–Fπ_F). However, in the structure of 3, possessing additional hydrogen atoms of the linkage NH-groups, the formation of hydrogen bonds is favoured, whereas fluorine contacts are less apparent. Investigations by powder X-ray diffraction and thermogravimetric analysis revealed substantial differences in the host–guest interactions of the inclusion compounds.