Cone and 1,3-alternate conformers of 1,3-bis(ethoxycarbonylmethoxy)-2,4-dihydroxycalix[4]arene and 1,2,3,4-tetrakis(ethoxycarbonylmethoxy)calix[4]arene

Autor:	Ivan Leban, Boštjan Genorio, Gerald Giester, Jože Kobe
Rok vydání:	2003
Předmět:	Chemistry Stereochemistry Hydrogen bond Ether General Medicine Crystal structure Medicinal chemistry General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound Cone (topology) Calixarene Molecule Conformational isomerism Cyclophane
Zdroj:	Acta Crystallographica Section C Crystal Structure Communications. 59:o221-o224
ISSN:	0108-2701
DOI:	10.1107/s0108270103005298
Popis:	The two title ethoxy­carbonyl­methoxy derivatives of calix­[4]­arene, namely diethyl 2,4-di­hydroxy­calix­[4]­arene-1,3-diyldi(oxy­ace­tate), C36H36O8, (I), and tetraethyl ­calix­[4]­arene-1,2,3,4-tetra­yltetra­(oxy­acetate), C44H48O12, (II), form two different conformations, viz. a cone in (I), where intramol­ecular hydrogen bonds are formed through OH groups in a partially substituted calix­[4]­arene, and a 1,3-alternate form of a completely substituted calix­[4]­arene in (II). A unique three-dimensional array of mol­ecules exists in (II), with the channels extended along the entire crystal.
Databáze:	OpenAIRE
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