
TY  - JOUR
A1  - Cornforth, SJ 
A1  - Patrick, VA 
A1  - White, AH 
T1  - The crystallographic characterization of an unusual chemical reversal of photoisomerization
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1984
VL  - 37
IS  - 7
SP  - 1453
EP  - 1460
KW  - 
UR  - https://doi.org/10.1071/CH9841453 
N2  - lmines formed from pinacolone and primary amines could be acylated by acid chlorides or anhydrides to products hydrolysable to 1,3-diones. Renzoyl chloride with pinacolone benzylinline gave 3-(N-benzoyl-N-benzylamino)-4,4-dimethyl-1-phenylpent-2-en-1-one, both geometrical isomers of which were prepared. The yellow Z isomer was converted into the colourless E isomer on exposure to daylight and this change was reversed by brief treatment of the E isomer with aqueous ethanolic alkali. The Z and E isomers have been characterized crystallographically. The E isomer is monoclinic, C2/c, a 10.241(4), b 17.199(6), c 25.495(9) Å, &#946; 100.45(3)º, Z = 8; R was 0.052 for 1947 'observed' reflections. The Z-isomer is orthorhombic, P212121, a 18.24(1), b 15.60(l), c 7.871(4) Å, Z = 4; R was 0.061 for 902 'observed' reflections. 
ER  -

