
%0 Journal Article
%A Collins, MJ 
%A Gready, JE 
%A Sternhell, S 
%A Tansey, CW 
%T An N.M.R. Investigation of the Mills-Nixon Effect
%J Australian Journal of Chemistry
%D 1990/09/01
%V 43
%N 9
%P 1547-1557
%K 
%R https://doi.org/10.1071/CH9901547
%U https://www.publish.csiro.au/paper/CH9901547 
%X The 4J(H-C-C-Me) coupling constant, previously established1-3 as a probe of bond order, was used to examine the bond orders in a series of ortho -bridged compounds: benzocyclopropene , 1,2- dihydrobenzocyclobutene , indan and tetralin . No evidence for sterically induced bond fixation (i.e. the Mills-Nixon4 effect) was found, but some evidence for electronic distortion In the corresponding benzylic ketones was observed. The experimental results are in accord with SCF/MO calculations. 
