Aspects of the cage effect in the decomposition of azo-bis-isobutyronitrile

Effects of metal ions in free radical reactions

“…As it turned out, further experiments in isopropanol were I not carried out, but the build up and decay of Kelm in aceto nitrile at 80° is shown in Table 10 and Figure 11. Similar curves for benzene and carbon tetrachloride can be found on page 67 of Trapp' s thesis (69).. The copper chloride was added at the time of maximum concentration of Kelm and an aliquot removed a minute later.…”

“…Since the build-up and decay of Kelm wàs known to be sol vent dependent (69), it was first necessary to study the build up and decay of Kelm in acetonitrile. Because the method of determining absorbance (see section on Infrared (IB) analysis) differed from that used by Trapp (69), a Beer's Law plot was made using solutions made from pure Kelm.…”

“…Since the build-up and decay of Kelm wàs known to be sol vent dependent (69), it was first necessary to study the build up and decay of Kelm in acetonitrile. Because the method of determining absorbance (see section on Infrared (IB) analysis) differed from that used by Trapp (69), a Beer's Law plot was made using solutions made from pure Kelm. There was also the possibility that the same kind of experiment would be done in isopropanol, so a Beer's Law plot was made for the case when isopropanol was solvent as well.…”