/. Am. Chem. Soc. 1994, 116, 6979-Í980
Hydrogen Tunneling in the Activation of Dioxygen by Tris(pyrazolyI)borate Cobalt Complex
Scheme
a
6979
1
o,
Mg, N2 T|>“CoI 1
-
Tp-Co-N2-CoTp"
-
2
Tp"Co 1.3 kcal/mol), (4) difference in the preexponential factors (/4-factors) resulting from an Arrhenius analysis (An/Ad < 0.6; in the Eyring analysis this appears as a difference in AS*). Figure 1 shows a comparative Eyring plot for the decompositions of 7 and 7-
