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Fig. 16
Molecular structure of the 2 : 1 complex between octyloxystilbazole and 1,4-di-
iodotetrafluorobenzene (
16
-8). Reproduced from [44] by kind permission of the Royal
Society of Chemistry
Fig. 17
Molecular structure of the 2 : 1 complex between octyloxystilbazole and 1,4-di-
bromotetrafluorobenzene (
17
-8). Reproduced from [44] by kind permission of the Royal
Society of Chemistry
Complex
17
-8 melted at 92 to 93
◦
C - higher than the melting point of di-
bromotetrafluorobenzene at 78-81
◦
C - yet no mesophase was seen [24]. It is
believed that this is due to the much weaker nature of the N
...
Br interaction,
an observation consistent with those made for complexes between alkoxystil-
bazoles and bromopentafluorobenzene [20].
Fig. 18
Components used to form mesomorphic, halogen-bonded polymers
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