Bis-swallow-tailed compound

Because of the very bulky swallow tails, the packing bi-swallow-tailed compounds in layers of smectic A phases would lead to large gaps between the cores. Therefore in smectic C layers the packing in which the molecules are shifted somewhat in the Ion-... 

Recently, bi-swallow-tailed compounds that show a very unusual polymorphism have been described. Weissflog and coworkers [205] have presented a series (Table 38) of compounds the lower members of which show classical smectic C and nemat-... 

Weissflog et al. [206] in another series of bi-swallow-tailed compounds, found very complex polymorphism (see 14). In the... 

Table 38. Bi-swallow-tailed compounds (data from Weissflog et al. [205]).

There are also compounds with swallow tails on both ends of the molecule ( bi-swal-low-tailed compounds) (e.g. 13 [201]). 

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