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Initial rate values for the reaction of [FeIIMST]− and O2 in the presence of [NMe4]+, 3 equiv of Ba(OTf)2/18-crown-6, 3 equiv of Sr(OTf)2/15-crown-5, and 3 equiv of Ca(OTf)2/15-crown-5.
| Cation | Initial Rate (s−1) | Rate relative to NMe4+ |
|---|---|---|
| NMe4+ | 2.2 ± 0.1 × 10−4 | 1 |
| Ba(OTf)2/18-crown-6 | 2.3 ± 0.6 × 10−3 | 10 |
| Sr(OTf)2/15-crown-5 | 7.4 ± 1.6 × 10−3 | 34 |
| Ca(OTf)2/15-crown-5 | 7.9 ± 0.4 × 10−3 | 36 |
