Inorg. Chem. 1989, 28, 1553-1559
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(NH3)5CoNCCH2' radical at about the same rate as with other organic radicals ( lo7 M-* s-l ) , then the Cr(I1) concentration of M in the earlier study allows one to estimate an upper limit for the intramolecular electron transfer of lo5 s-'. T h e suggestion that Co(DMGH), reacts more slowly than Cr(I1) with
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the radical is consistent with the observations of Elroi and Meyerstein2' from a pulse radiolysis study. Their results with a cobalt(I1) macrocycle imply that the rate constant for a radical with an electron-withdrawing substituent, such as NCCH; would be
