A comparative study of crystal structures and inclusion properties of fluorinated triazines |
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Authors: | Katharina Reichenbaecher Edwin Weber |
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Institution: | a Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland b Institute of Chemistry, University of Neuchâtel, Av. Bellevaux 51, CH-2007 Neuchâtel, Switzerland c Institute of Organic Chemistry, TU Bergakademie Freiberg, Leipziger Str. 29, D-09596 Freiberg/Sachsen, Germany |
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Abstract: | 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-H?F, F?F, C-F?πF). 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. |
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Keywords: | Fluorine compounds Triazines Inclusions Host-guest compounds Fluorine interactions |
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