POLYTOPIC CATION RECEPTORS .4. RING-ENLARGED DIBENZO-CROWN-6 ETHERS -CATION-BINDING AND X-RAY CRYSTAL-STRUCTURE OF DIBENZO-22-CROWN-6

Authors
OUCHI M ARAKI T HAKUSHI T SOBHIA ME CHACKO KK SKOBRIDIS K WEBER E
Citation
M. Ouchi et al., POLYTOPIC CATION RECEPTORS .4. RING-ENLARGED DIBENZO-CROWN-6 ETHERS -CATION-BINDING AND X-RAY CRYSTAL-STRUCTURE OF DIBENZO-22-CROWN-6, Bulletin of the Chemical Society of Japan, 66(8), 1993, pp. 2309-2314
Citations number
31
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Chemical Society of Japan → ACNP
ISSN journal
00092673
Volume
66
Issue
8
Year of publication
1993
Pages
2309 - 2314
Database
ISI
SICI code
0009-2673(1993)66:8<2309:PCR.RD>2.0.ZU;2-I
Abstract
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 (P2(1)/c), a=7.328(1), b=17.395( 4), c=8.939(1) angstrom, beta=102.78(1)degrees, Z=2, R=0.049 for 2122 reflections. The macrocycle shows a crystallographic center of symmetr y with elliptical arrangement of the heteroatoms stabilized by possibl e C-H...O dipolar attractions.