Stereoselective Formation of Rotaxanes Composed of Polymethylene-bridged Dinuclear Cobalt(III) Complexes and α-Cyclodextrin. II
- 1 June 1984
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 57 (6) , 1596-1603
- https://doi.org/10.1246/bcsj.57.1596
Abstract
[2]-[[(en)2Co{XCH2S(CH2)nSCH2Y}Co(en)2]Clm]-[α-CDX]-rotaxanes (n=8, 10, and 12 for X=Y=CO2− (m=4); n=10 for X=CO2− and Y=CH2NH2(m=5); α-CDX=α-cyclodextrin) were prepared with partial stereoselectivity and characterized from their visible-UV absorption, circular dichroism(CD), and 13C NMR spectra, and elemental analysis. The rotaxane formation could be identified by the down field shift of the chemical shift due to α-CDX in the 13C NMR spectra and the increase of the CD intensity in the ligand-to-metal charge transfer band region in the CD spectra. The rotaxanes always showed apparently ΔΔ-rich CD spectra, the highest selectivity(10% ΔΔ-rich) being found in the case of n=10.This publication has 8 references indexed in Scilit:
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