Influence of the size of the counter-ion on the conformational stability of the alkali metal complexes of 2,2'-dithienyl ketyl |
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| Authors: | GF Pedulli A Alberti |
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| Institution: | Istituto di Chimica Organica dell''Università di Bologna, 40136 - Bologna Italy;Laboratorio del C.N.R. dei Composti del Carbonio Contenenti Eteroatomi e loro Applicazioni, Ozzano Emilia Italy |
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| Abstract: | The ratio between the trans—trans and cis—trans isomers has been measured in the 2,2'-dithienyl ketyl and in its Li, Na, K and Cs complexes. The stability of the trans—trans conformation was found to increase with increasing size of the alkali counter-ion. This trend has been interpreted in terms of steric interaction between the cation and the atoms adjacent to the binding site. |
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