Structure of the partial cone conformer of 25,26,27,28-tetrakis[(2-pyridylmethyl)oxy]calix[4]arene
Ferguson, George, Gallagher, John F.ORCID: 0000-0002-7112-7450 and Pappalardo, Sebastiano
(1993)
Structure of the partial cone conformer of 25,26,27,28-tetrakis[(2-pyridylmethyl)oxy]calix[4]arene.
Acta Crystallographica Section C, 49
(8).
pp. 1537-1540.
ISSN 0108-2701
The partial cone conformer of tetrakis[(2-pyridylmethyl)-
oxy]pentacyclo[ 19.3.1.13'7.19'13.115,19]octacosa- 1 (25),-
3,5,7 (28),9,11,13 (27), 15,17,19(26),21,23-dodecaene, (I),
adopts a conformation in which the pendant OCH2py
group of the rotated aryl ring is oriented away from the
calixarene cavity produced by the other three aryl rings,
with its N atom exo to the calixarene cup. The orientation
of the four aromatic rings is such that two rings are almost
parallel to each other and the other two are at an angle of
42 ° . This conformation precludes any solvent molecule
being enclathrated within the small molecular cavity.