Abstract
Allene dimers of the 1,2-dimethylenecyclobutane-type with bridged aromatic groups (fluorenylidene units) and extra substituents (Me,t-Bu)2a-c have been synthesized and characterized by elemental analysis and spectroscopic data. Their crystal inclusion properties are reported. The unsubstituted compound2a yields only an inclusion compound withp-xylene, while methyl-substituted2b enclathrates a broad range of molecules. On the other hand, thet-butyl-substituted2c does not form clathrates, crystallizing as a pure compound. Complete structural descriptions of the two inclusion compounds2a-p-xylene (2:1) and2b-phenyloxirane (1:1) are given. They represent interstitial clathrates. Crystallographic data of the 1:1p-xylene clathrate of2b (which is isomorphous to its phenyloxirane analog) and of unsolvated2c are also reported. As indicated by the results, substitutional effects critically influence the inclusion properties of the new clathrate family.
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Weber, E., Seichter, W., Goldberg, I. et al. Clathrates of allene dimers. X-ray crystal structures of two inclusion compounds withp-xylene and phenyloxirane. J Incl Phenom Macrocycl Chem 10, 267–282 (1991). https://doi.org/10.1007/BF01066210
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DOI: https://doi.org/10.1007/BF01066210