Reduction potentials for twenty-three beta-substituted free base porphyrins are reported, along with substituent partial potentials and correlations are made with porphyrin basicity and reactivity.
Reduction potentials for twenty-three beta-substituted free base porphyrins are reported, along with substituent partial potentials and correlations are made with porphyrin basicity and reactivity.
The yields of 53.3-d 7Be and 280-yr 32Si from the thermal-neutron fission of 235U have been investigated. Upper limits of 2 · 10−10% and 1.2 · 10−10% have been set for the fission yields of 7Be and 32Si, respectively. The yields of these isotopes are lower by 4 to 5 orders of magnitude than indicated from results of instrumental measurements.

