Stereochemistry in trivalent nitrogen compounds. 39. Configurational biasing of tertiary amide ionophores by alkali metal chelation

…, J Greenblatt, S Woodson, E Hortelano…

Index: Craine; Greenblatt; Woodson; Hortelano; Raban Journal of the American Chemical Society, 1983 , vol. 105, # 25 p. 7252 - 7255

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Citation Number: 10

Abstract

Abstract: Configurational analysis can be used as a probe for association constants for chelation of amides with alkali metals. Carbon-13 NMR spectroscopy indicates that tertiary amides 1, 2, and 3, each bearing a triethylene oxide substituent at nitrogen, exist as a mixture of E and Z isomers. Addition of alkali metal cation (KSCN) increases the concentration of species with the Z configuration since this configuration can chelate ...

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