
TY  - JOUR
A1  - Nishimura, N 
A1  - Takeda, K 
A1  - Furumatsu, Y 
T1  - E.S.R. and Kinetic Studies on Radicals Produced by Photolysis of Bis(1-methylethyl)diazenes (Azoisopropanes)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1989
VL  - 42
IS  - 6
SP  - 823
EP  - 835
KW  - 
UR  - https://doi.org/10.1071/CH9890823 
N2  - Radicals generated by photolysis of bis(1-methylethyl) diazenes (azoisopropanes) Me2C(X)-N=N-C(X)Me2, where X = -CN, -SCN, -SPh and -OAc, have been studied by means of spin trapping and radical scavenger techniques. The primarily photoproduced radicals of the type C(X)Me2 were trapped by N-t-butyl-a- phenylnitrone, except for X = -SCN. In this case, thiocyanatyl radicals were trapped by N-t-butyl-a- phenylnitrone . Radicals generated by thermoiysis were all of the type 'C(X)Me2. The diffusive separation process of a pair of photoproduced geminate radicals was investigated spectrophotometrically by following the disappearance of 2,4,6-triphenyl-3,4-dihydro-1,2,4,5-tetrazin-12H)-yl ( verdazyl ), in binary solvent systems of different viscosities. The reciprocal of the apparent zero-order rate constant with respect to verdazyl was found to be linearly related to the viscosity. This first-power relationship is briefly considered. 
ER  -

