caa a22 4500 469059168 CHVBK 20180323132852.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF01053871 doi (NATIONALLICENCE)springer-10.1007/BF01053871 On the solid-state conformations of 18-crown-6 complexes [Elektronische Daten] [Thomas Fyles, Richard Gandour] A procedure for displaying macrocylic torsion angles as a map on polar coordinates is discussed with reference to the solid-state conformations of l8-crown-6 and its complexes. The maps aid in comparisons of related structures, in the perception of pseudo-symmetry elements, and in the classification of the conformations of 18-crown-6. Only four conformational groups are found in the 1 : 1 complexes of 18-crown-6 with sodium, potassium, rubidium, cesium, thallium(I), calcium and strontium cations. The relationship of donor number, mean cavity radius and effective ionic radius combined with skeletal drawings of the donors and the polar map of the torsion angles provide a composite picture of the structures and insight into the balance between cation-donor interaction energy and conformational energy. Kluwer Academic Publishers, 1992 18-crown-6 nationallicence conformations nationallicence solid-state complexes nationallicence torsion angle nationallicence Fyles Thomas Department of Chemistry, University of Victoria, V8W 3P6, Victoria, B.C., Canada aut Gandour Richard Department of Chemistry, Louisiana State University, 70802-1804, Baton Rouge, LA, USA aut Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 12/1-4(1992-01-01), 313-332 0923-0750 12:1-4<313 1992 12 10847 https://doi.org/10.1007/BF01053871 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01053871 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fyles Thomas Department of Chemistry, University of Victoria, V8W 3P6, Victoria, B.C., Canada aut NATIONALLICENCE 700 1- Gandour Richard Department of Chemistry, Louisiana State University, 70802-1804, Baton Rouge, LA, USA aut NATIONALLICENCE 773 0- Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 12/1-4(1992-01-01), 313-332 0923-0750 12:1-4<313 1992 12 10847 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer