Abstract
Three lower rim n-propyl substituted calix[4]arenes (1–3) with varied number and position of the modifying groups have been prepared. Inclusion compounds (five species) involving different kinds of guest solvents have been isolated. Their X-ray crystal structures were determined and comparatively discussed using isostructurality calculations. Two of the inclusion compounds obtained (1a and 1b) are polymorphs containing the same host and guest molecules in equal stoichiometric ratio but different Z′ values caused by a phase transition around 140 K. The inclusion compounds 2a and 2b refer to the interesting case of a mixed solvent complex while 3a allows studying the effect of full lower rim n-propyl substitution.
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Financial support from the German Federal Ministry of Economics and Technology (BMWi) under grant No. 16IN0218 ‘ChemoChips’ and Hungarian Research Fund (OTKA T049712) is gratefully acknowledged.
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Gruber, T., Peukert, M., Schindler, D. et al. Crystalline inclusion compounds of lower rim propyl substituted calix[4]arenes featuring different number and positions of the modifying groups. J Incl Phenom Macrocycl Chem 62, 311–324 (2008). https://doi.org/10.1007/s10847-008-9473-x
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DOI: https://doi.org/10.1007/s10847-008-9473-x