Fig. 7

Control experiments with 18O labeling study. a Reactions were run in the presence of 20 equiv of H2 18O. b Reactions were run in the presence of 18O2 atmosphere (1 atm)

Control experiments with 18O labeling study. a Reactions were run in the presence of 20 equiv of H2 18O. b Reactions were run in the presence of 18O2 atmosphere (1 atm)