
TY  - JOUR
A1  - Greenwood, RJ 
A1  - Mackay, MF 
A1  - Wilshire, JFK 
T1  - Structure of an Ultraviolet Absorber: 2-(3'-t-Butyl-2'-hydroxy-5'-methylphenyl)-benzotriazole
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1992
VL  - 45
IS  - 5
SP  - 965
EP  - 968
KW  - 
UR  - https://doi.org/10.1071/CH9920965 
N2  - 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). 
ER  -

