- New mono- and bis-substituted amide-linked aza crown ether-cobalticinium compounds have been prepared and shown by 1H nuclear magnetic resonance and electrochemical studies to accept chloride and bromide guest anions. Preliminary association constant determinations suggest that use of aza-crown-ether-complexed sodium cations in combination with an amide-linked positively charged cobalticinium redox centre leads to cooperative enhancement of the strength of anion complexation. © 1994.
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NEW ANION RECEPTORS BASED ON COBALTICINIUM-AZA CROWN-ETHER DERIVATIVES
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