Synthesis, structure and conformational mobility of tetra-substituted cyanomethoxy p-tert-butylcalixarenes
MetadataShow full item record
The syntheses and single crystal X-ray structure determinations of 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(cyanomethoxy)calixarene (partial-cone conformer), 5,11,17,23-tetra-tert-butyl-25,27-bis(diethylcarbamoylmethoxy)-26,28-bis(cyanomethoxy)calixarene (cone and partial-cone conformers), 5,11,17,23-tetra-tert-butyl-25,26,27-tris(cyanomethoxy)-28-hydroxycalixarene, and 5,11,17,23-tetra-tert-butyl-25-diethylcarbamoylmethoxy-26,27,28-tris(cyanomethoxy)calixarene (cone conformer) are reported. The calixarenes are found to be conformationally mobile when heated in DMSO, favouring the partial-cone conformer at equilibrium. The tris-substituted cyanomethoxy derivative was found to assume the partial-cone conformation in the solid state. Attempts to convert nitrile groups to tetrazole moieties in derivatives containing both amide and nitrile groups were unsuccessful.
This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc/3.0/
Showing items related by title, author, creator and subject.
Syntheses, structural studies and solution properties of iron complexes of some amide-substituted calixarenesOgden, Mark; Skelton, B.; White, A. (2001)Iron(III) complexes of 5,11,17,23-tetra-tert-butyl-24-hydroxy-26,27,28-tris(diethylcarbamoylmethoxy)calixarene (II) and 5,11,17,23,29,35-hexa-tert-butyl-36,39-dihydroxy-37,38,40,41-tetrakis(diethylcarbamoylmethoxy)ca ...
McIldowie, Matthew; Skelton, B.; Mocerino, Mauro; Ogden, Mark (2015)The synthesis and structural characterization of a lanthanum picrate complex of the proximally-substituted calixarene bisamide, 5,11,17,23-tetra-tert-butyl-25,26- bis(diethylcarbamoylmethoxy)-27,28-dihydroxycalix ...
McIldowie, M.; Skelton, B.; Mocerino, Mauro; Ogden, Mark (2015)© Springer Science+Business Media Dordrecht 2015. The synthesis and structural characterization of a lanthanum picrate complex of the proximally-substituted calixarene bisamide, 5,11,17,23-tetra-tert-butyl-25,26-bis( ...