The effect of crown ether on steric hindrance to base approach in bimolecular elimination: evidence against clump aggregate model of ion-paired alkoxide base

M Pánková, J Závada

Index: Pankova, Magdalena; Zavada, Jiri Collection of Czechoslovak Chemical Communications, 1980 , vol. 45, # 11 p. 3150 - 3159

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Abstract

Abstract The effect of 18-crown-6-ether upon geometrical orientation and rates was investigated in tert-C 4 H 9 OK-tert-C 4 H 9 OH promoted anti-elimination from two homologous series of tosylates, RCH 2 CHOTsC 5 H 11 and RCHOTsCH 2 C 5 H 11 (R= H, CH 3, C 2 H 5, nC 3 H 5, iso-C 3 H 7, tert-C 4 H 9). Steric requirements of the cis-and trans- stereoselective base species operating in the reaction in the absence and in the presence ...

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