ISSN:
1573-1111
Keywords:
calix[4]arene
;
calixcrown
;
ether ester
;
crystal structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The crystal and molecular structure of3 has been determined by X-ray analysis. Thecrystal data are: triclinic, space group P'1,a = 12.999(2),b = 14.114(3),c = 16.132(3) Å,α = 91.62(2),β = 97.71(1),γ = 91.38(2)°,V = 2930.6(9) Å3,Z = 2,Dm = 1.046 g cm-3.Rotational disorder has been seen in the t-butyl groups whichwere refined isotropically. Least-squares refinementbased on F2, using 4827 observedreflections with I 〉 2σ(I) and 18 restraints,led to R = 0.123. The calix is found in a coneconformation. The crown ether part of the molecule isnot in a fully extended conformation but has foldsin the chain. The calix[4]crown ether-ester exhibitsmolecular recognition properties toward alkylamines.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008134703152
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