Journal of the Chemical Society, Dalton Transactions p. 3447 - 3454 (1995)
Update date:2022-08-05
Topics:
Beer, Paul D.
Drew, Michael G. B.
Hodacova, Jana
Stokes, Sally E.
A new macrocyclic amide-substituted cobaltocenium receptor 1.1'-<(ethylenedioxy)bis(ethyleneaminocarbonyl)>cobaltocenium hexafluorophosphate 2 has been prepared and its single-crystal X-ray structure determined.Proton NMR anion co-ordination studies revealed that 2 and other new acyclic cobaltocenium derivatives complex chloride and bromide anions with 1:1 stoichiometry.Comparative stability constant evaluations imply that the macrocyclic receptor 2 forms halide complexes of greatest thermodynamic stability, suggestive of a 'macrocyclic anion effect'.Cyclic voltammetric investigations showed the cobaltocenium receptors to electrochemically recognise halide anions.
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