Ferguson, George, Gallagher, John F.ORCID: 0000-0002-7112-7450 and McKervey, M. Anthony
(1993)
Tetramethyl tert-butylcalix[4]arene tetraketone.
Acta Crystallographica Section C, 49
(3).
pp. 602-604.
ISSN 0108-2701
The title molecule, 25,26,27,28-tetraacetonyloxy-5,11,-
17,23-tetra-tert-butylpentacyclo[19.3.1.13,7.19,13.115,19]-
octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19,21,23-dodecaene, has twofold crystallographic symmetry and
adopts a distorted cone conformation in the solid state. The orientation of the four aromatic tings is such that two
of the rings are almost parallel to each other and the other
two almost normal to one another. This conformation precludes
a solvent molecule being enclathrated within the
cavity.