Ring-Enlarged Dibenzo-Crown-6 Ethers. Cation Binding and X-Ray Crystal Structure of Dibenzo-22-Crown-6

Autor:	Mikio Ouchi, Tadao Hakushi, Kizakkekoikkal K. Chacko, Takashi Araki, Konstantinos Skobridis, M. Elizabeth Sobhia, Edwin Weber
Rok vydání:	1993
Předmět:	Cation binding Crystallography Stereochemistry Chemistry X-ray crystallography Heteroatom Molecule General Chemistry Crystal structure Selectivity Ring (chemistry) Monoclinic crystal system
Zdroj:	Bulletin of the Chemical Society of Japan. 66:2309-2314
ISSN:	1348-0634 0009-2673
DOI:	10.1246/bcsj.66.2309
Popis:	The cation binding of dibenzo-20-crown-6 (2) and dibenzo-22-crown-6 (3) are determined by quantitative solvent extraction study. Compound 3 shows high Tl+/K+ and Tl+/Rb+ selectivity. The crystal structure of 3 is reported. Crystal data: monoclinic (P21/c), a = 7.328(1), b = 17.395(4), c = 8.939(1) A, β = 102.78(1)°, Z = 2, R = 0.049 for 2122 reflections. The macrocycle shows a crystallographic center of symmetry with elliptical arrangement of the heteroatoms stabilized by possible C–H···O dipolar attractions.
Databáze:	OpenAIRE
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