
%0 Journal Article
%A Greenwood, RJ 
%A Mackay, MF 
%A Wilshire, JFK 
%T Structure of an Ultraviolet Absorber: 2-(3'-t-Butyl-2'-hydroxy-5'-methylphenyl)-benzotriazole
%J Australian Journal of Chemistry
%D 1992/05/01
%V 45
%N 5
%P 965-968
%K 
%R https://doi.org/10.1071/CH9920965
%U https://www.publish.csiro.au/paper/CH9920965 
%X The 5&#8242;-methyl derivative (1) of 2-(2&#8242;-hydroxyphenyl) benzotriazole is an effective ultraviolet absorber, the planar molecule having a strong intramolecular (OH&#8230;N) hydrogen bond which is considered responsible for its high photostability. X-Ray analysis of the title compound (2) has shown that the introduction of a bulky t-butyl substituent ortho to the phenolic hydroxyl group results in a stronger intramolecular interaction; the OH&#8230;N spacing of 2.568(4) Å is shorter than that [2.616(2) Å previously reported for compound (1). 
