caa a22 4500 469059192 CHVBK 20180323132852.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF01053857 doi (NATIONALLICENCE)springer-10.1007/BF01053857 Conformational mobility in chemically-modified cyclodextrins [Elektronische Daten] [Paul Ellwood, Catriona Spencer, Neil Spencer, J. Fraser Stoddart, Ryszard Zarzycki] The observation that per-2,6-O-methyl-3-O-benzoyl-α-cyclodextrin (1) displays some unusual conformational behaviour in solution has led to a detailed investigation by (dynamic) NMR spectroscopy of the equilibration process that occurs in solutions of per-2,3-O-benzoyl-α-cyclodextrin (3) and some related compounds (7-9) between conformational isomers with averagedC 6 andC 3 molecular symmetries in certain organic solvents such as benzene, dichloromethane, and chloroform. The solvent dependence of the conformational equilibrium is also reflected in a spread of values for the specific optical rotations for 3 from +9° in 1,1,2,2-tetrachloroethane, where there is a degenerate equilibrium between species withC 3 molecular symmetry, to +92° in acetone where a species with averagedC 6 symmetry is present. Kluwer Academic Publishers, 1992 Chemically-modified cyclodextrins nationallicence conformational analysis nationallicence NMR spectroscopy nationallicence Ellwood Paul Department of Chemistry, The University, S3 7HF, Sheffield, UK aut Spencer Catriona Department of Chemistry, The University, S3 7HF, Sheffield, UK aut Spencer Neil Department of Chemistry, The University, S3 7HF, Sheffield, UK aut Fraser Stoddart J. Department of Chemistry, The University, S3 7HF, Sheffield, UK aut Zarzycki Ryszard Department of Chemistry, The University, S3 7HF, Sheffield, UK aut Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 12/1-4(1992-01-01), 121-150 0923-0750 12:1-4<121 1992 12 10847 https://doi.org/10.1007/BF01053857 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01053857 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ellwood Paul Department of Chemistry, The University, S3 7HF, Sheffield, UK aut NATIONALLICENCE 700 1- Spencer Catriona Department of Chemistry, The University, S3 7HF, Sheffield, UK aut NATIONALLICENCE 700 1- Spencer Neil Department of Chemistry, The University, S3 7HF, Sheffield, UK aut NATIONALLICENCE 700 1- Fraser Stoddart J. Department of Chemistry, The University, S3 7HF, Sheffield, UK aut NATIONALLICENCE 700 1- Zarzycki Ryszard Department of Chemistry, The University, S3 7HF, Sheffield, UK aut NATIONALLICENCE 773 0- Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 12/1-4(1992-01-01), 121-150 0923-0750 12:1-4<121 1992 12 10847 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer