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Further, this figure would mean that Ni+=CHCH3 could be formed in the ethane system beginning about 1.4-1.8 eV, consistent with the high-energy reactivity observed in Figure l b . In the Cu+-isobutane system, the apparent threshold for CuC2H4+is -2.8 eV (65 kcal/mol) (Figure 4c), which suggests that Do(Cu+
