
%0 Journal Article
%A Becker, HD 
%A Skelton, BW 
%A White, AH 
%T Molecular Topology of Linked Anthracenes: X-Ray Structure Analyses of Alkyl Di-9-anthryl-glycolates, 9-Anthryl 9-Anthrylmethyl Ethers and Their Photoisomers
%J Australian Journal of Chemistry
%D 1989/11/01
%V 42
%N 11
%P 1869-1880
%K 
%R https://doi.org/10.1071/CH9891869
%U https://www.publish.csiro.au/paper/CH9891869 
%X The molecular structures of ethyl di-9-anthrylglycolate (1) and methyl di-9-anthrylglycolate (2), as well as those of three isomerization products of (2), have been established by single-crystal X-ray diffraction studies. In both (1) and (2), the anthracenemoieties are characterized by marked deviations from planarity. The stereospecific course of the thermal and photochemical isomerization of (2) by Diels -Alder reaction is suggested to be governed by the spatial demand of the alkoxycarbonyl group. Base-catalysed isomerization of (2) by migration of 9-anthryl from carbon to oxygen is associated with steric relief. 
