. 2023 Nov 2;62(45):18697–18706. doi: 10.1021/acs.inorgchem.3c03089

Table 2. Calculated Rate Constants k (M^–1 min^–1, 298 K) for the Catalyzed Hydration Reactions of Propargyl Ester 3a with and without N-Oxide^a ^b.

		N-oxide
catalyst	no N-oxide	10	9
2_in•Au(I)•OTf	1.7 ± 0.3 (>80 ± 2)	0.035 ± 0.007 (10 ± 2)	0.30 ± 0.06 (36 ± 1)
2_out•Au(I)•OTf	1.0 ± 0.1 (80 ± 2)	0.34 ± 0.08 (38 ± 2)	0.5 ± 0.1 (40 ± 4)
5•Au(I)•OTf	0.89 ± 0.04 (74 ± 2)	<1 × 10^–²^c (<5)	<1 × 10^–²^c (<5)

The values in parentheses represent the % of reaction conversion after 30 min.

Reaction conditions: [3a] = 10 mM, [catalyst] = 0.5 mM, [N-oxide] = 0.5 mM, rt, and water saturated CD₂Cl₂.

The selected theoretical kinetic model considering a bimolecular irreversible reaction did not provide a good fit to the experimental results and we could only estimate a value of the reaction rate.

Table 2. Calculated Rate Constants k (M–1 min–1, 298 K) for the Catalyzed Hydration Reactions of Propargyl Ester 3a with and without N-Oxideab.

Table 2. Calculated Rate Constants k (M^–1 min^–1, 298 K) for the Catalyzed Hydration Reactions of Propargyl Ester 3a with and without N-Oxide^a ^b.