
%0 Journal Article
%A Halton, B 
%A Russell, SGG 
%T Studies in the Cycloproparene Series: Attempted Cycloadditions With Tricyclo-[5.4.1.0<sup>3,5</sup>]dodeca-2,5,7,9,11-pentaene
%J Australian Journal of Chemistry
%D 1992/05/01
%V 45
%N 5
%P 911-917
%K 
%R https://doi.org/10.1071/CH9920911
%U https://www.publish.csiro.au/paper/CH9920911 
%X 4,4-Dichlorotricyclo[5.4.1.03,5]dodeca-7,9,11-triene (18a) undergoes cycloaddition with 4-phenyl-1,2,4 triazoline-3,5-dione via its norcaradiene valence-bond isomer (18b) to give adduct (21)in 86% yield. By comparison the aromatic tricyclo [5.4.1.03,5]dodeca-2,5,7,9,11-pentaene (6)and its 12-chloro stereoisomer (20) fail to react; this contrasts with the behaviour of other 1,6-methano[10] annulene derivatives. 
