Hydrocarbon hosts

The distance between facing pairs of double bonds was shown by X-ray crystallography to be 

One of the most effective ligands for complexation of Ag(I) is the highly preorganised diphe-nylmethane-derived cyclophane 3.141. This compound incorporates a norbomyl bridgehead and alkene walls making the cavity extremely rigid, while the aromatic rr-surface is complementary to 

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Crystals of another pure hydrocarbon host 48 are formed in dimethyl sulfoxide 74. Constituents of this structure are also arranged into helical arrays (Fig. 16). 

Table 19. Crystal data of pure hydrocarbon host-guest inclusions...

We then searched for simple hydrocarbon hosts which have a twisted structure of aromatic groups and found that triphenylmethane 21 forms 1 1 inclusion compounds with benzene, toluene, and dioxane. In contrast, tetraphenylmethane was found to be a poor host. Only carbon tetrachloride is included in an 1 1 ratio, probably... 

The inclusion compounds formed by triangularly shaped hydrocarbon host molecule perhydrotriphenylene... 

Leyton, R, Sanchez-Cortes, S., Campos-Vallette, M., Domingo, C., Garcia-Ramos, J. V. and Saitz, C. 2005. Surface-enhanced Micro-Raman detection and characterization of calix[4]arene-polycyclic aromatic hydrocarbon Host-Guest complexes. Appl. Spectrosc. 59(8) 1009-1015. 

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