TY - JOUR
T1 - Ditopic calixcrowns with inequivalent crown loops: synthesis and structural characterisation of an unsymmetrical calix[4]arenebiscrown-6
AU - Asfari, Z.
AU - Nicolle, X.
AU - Vicens, J.
AU - Dozol, J.-F.
AU - Duhart, A.
AU - Harrowfield, J.M.
AU - Skelton, Brian
AU - White, Allan
PY - 1999
Y1 - 1999
N2 - Consecutive base-catalysed reactions of calix[4]arene with the ditosylates of two different polyetherdiols result in the relatively efficient production of an unsymmetrical calixbiscrown-6 which, after reduction of an ethoxycarbonyl substituent to an hydroxymethyl group, has been characterised structurally by a room-temperature, single crystal X-ray study of its chloroform solvate. Crystals of (4), C53H62O13 . similar to 0.57CHCl(3), are triclinic, P (1) over bar, a 18.95(3), b 12.394(9), c 11.756(7) Angstrom, alpha 106.93(5), beta 101.77(8), gamma 94.63(8)degrees, Z = 2; R was 0.088 for 2231 'observed' (I > 3 sigma(I)) diffractometer data.
AB - Consecutive base-catalysed reactions of calix[4]arene with the ditosylates of two different polyetherdiols result in the relatively efficient production of an unsymmetrical calixbiscrown-6 which, after reduction of an ethoxycarbonyl substituent to an hydroxymethyl group, has been characterised structurally by a room-temperature, single crystal X-ray study of its chloroform solvate. Crystals of (4), C53H62O13 . similar to 0.57CHCl(3), are triclinic, P (1) over bar, a 18.95(3), b 12.394(9), c 11.756(7) Angstrom, alpha 106.93(5), beta 101.77(8), gamma 94.63(8)degrees, Z = 2; R was 0.088 for 2231 'observed' (I > 3 sigma(I)) diffractometer data.
U2 - 10.1023/A:1008062510582
DO - 10.1023/A:1008062510582
M3 - Article
SN - 0923-0750
VL - 33
SP - 251
EP - 262
JO - Journal of Inclusion Phenomena and Macrocyclic Chemistry
JF - Journal of Inclusion Phenomena and Macrocyclic Chemistry
IS - N/A
ER -