caa a22 4500 46905977X CHVBK 20180323132853.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1007/BF01053636 doi (NATIONALLICENCE)springer-10.1007/BF01053636 Conductance study of the complexation of substituted and lariat 16-crown-5 derivatives with alkali metal ions in nonaqueous solvents [Elektronische Daten] [Yasuyuki Takeda, Itsumi Fujimaki, Shinichi Ochiai, Kazuhiko Aoki, Yoshihiro Kudo, Hiroaki Matsuda, Yoshihisa Inoue, Tadao Hakushi] Formation constants (K ML) of 1:1 complexes of 15-(2,5-dioxahexyl)-15-methyl-16-crown-5 (L16C5) and 15,15-dimethyl-16-crown-5 (DM16C5) with alkali metal ions were determined in acetonitrile (AN) and propylene carbonate (PC) by conductometry at 25°C. Except for the case of Li+-and K+-16C5 complexes in PC, the selectivity sequences of L16C5 and DM16C5 are identical with those of the parent crown ether 16-crown-5 (16C5) regardless of the solvent (AN, PC, methanol) (Na1 > Li+ > K+ > Rb+ > Cs+), which show the size-fit correlation. The selectivities of L16C5 and DM16C5 for the alkali metal ions are governed not by the sidearms but by the cavity size. The stability of the crown ether complex is dependent not on the dielectric constant but largely on the donor number of the solvent. TheK ML(M1 +)/K ML(M2 +) ratio of L16C5 or 16C5 varies very much with the solvent in the cases of M1=Na, M2=K and M1=Na, M2=Li, but that of DM16C5 is almost constant regardless of the solvent. Kluwer Academic Publishers, 1992 Solvent and lariat effect nationallicence 16-crown-5 derivatives nationallicence alkali metal ions nationallicence complex stability nationallicence conductometry nationallicence Takeda Yasuyuki Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Fujimaki Itsumi Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Ochiai Shinichi Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Aoki Kazuhiko Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Kudo Yoshihiro Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Matsuda Hiroaki Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut Inoue Yoshihisa Department of Material Science, Faculty of Science, Himeji Institute of Technology, Kamigori, 678-12, Hyogo, Japan aut Hakushi Tadao Department of Applied Chemistry, Faculty of Engineering, Himeji Institute of Technology, 2167 Shosha, Himeji, 671-22, Hyogo, Japan aut Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/2(1992-06-01), 129-138 0923-0750 13:2<129 1992 13 10847 https://doi.org/10.1007/BF01053636 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01053636 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Takeda Yasuyuki Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Fujimaki Itsumi Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Ochiai Shinichi Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Aoki Kazuhiko Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Kudo Yoshihiro Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Matsuda Hiroaki Department of Chemistry, Faculty of Science, Chiba University, Yayoi-cho, Chiba 260, Japan aut NATIONALLICENCE 700 1- Inoue Yoshihisa Department of Material Science, Faculty of Science, Himeji Institute of Technology, Kamigori, 678-12, Hyogo, Japan aut NATIONALLICENCE 700 1- Hakushi Tadao Department of Applied Chemistry, Faculty of Engineering, Himeji Institute of Technology, 2167 Shosha, Himeji, 671-22, Hyogo, Japan aut NATIONALLICENCE 773 0- Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/2(1992-06-01), 129-138 0923-0750 13:2<129 1992 13 10847 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer