Structures and properties of solvated and unsolvated isopropyl functionalised calix[4]arenes |
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| Authors: | Ryan T Chester Roland de Marco Mauro Mocerino Brian W Skelton Allan H White |
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| Institution: | 1. Department of Applied Chemistry , Nanochemistry Research Institute, Curtin University of Technology , Perth, WA, Australia;2. School of Biomedical, Biomolecular and Chemical Sciences, Chemistry M313 , The University of Western Australia , Crawley, WA, Australia |
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| Abstract: | The tetra-isopropyl ethers of calix4]arene and p-t-butylcalix4]arene have been isolated in the cone conformation, and structurally characterised as chloroform solvates. Thermogravimetric analysis demonstrated that the parent isopropylcalix4]arene solvate is significantly more stable than the p-t-butylcalix4]arene analogue, retaining the solvent up to a temperature of 125°C. It was found that the calix4]arene ether sublimes at atmospheric pressure, and solvent-free crystals appropriate for structure determination were produced at reduced pressure. The p-t-butylcalix4]arene ether was also isolated without solvent in the lattice, but in this case the calixarene was crystallised from acetone, as sublimation did not produce crystals of sufficient quality. |
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| Keywords: | crystal structure calixarene thermogravimetric analysis |
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