Skip to main content

View full-text article in PMC

. Author manuscript; available in PMC: 2021 Dec 4.

Published in final edited form as: ACS Catal. 2020 Nov 16;10(23):13932–13945. doi: 10.1021/acscatal.0c03764

Table 5:

¹⁸O kinetic isotope effect of O_lg and O_nuc for phosphate and phosphonate hydrolysis in water and PP1.

	pK_a	Phosphate-Nuc_H₂O			Phosphonate-Nuc_OH⁻

Substrate	LG pK_a	O_nuc	O_lg	O_lg Exp.¹²	O_nuc	O_lg	O_lg Exp.¹²

pNPP/pNPMP	7.0	0.993	1.020	1.0189	1.027	1.007	1.0098
pCNPP/pCNPMP	8.0	0.990	1.023	–	1.027	1.007	–
mCNPP/mCNPMP	8.6	0.985	1.027	–	1.028	1.007	–
mCLPP/mCLPMP	8.8	0.985	1.025	–	1.026	1.005	–
pCLPP/pCLPMP	9.3	0.985	1.029	–	1.025	1.006	–
PP/PMP	10.0	0.984	1.034	–	1.021	1.006	–
pMPP/pMPMP	10.2	0.983	1.034	–	1.019	1.007	–

	pK_a	PP1-Phosphate			PP1-Phosphonate

Substrate	LG pK_a	O_nuc	O_lg	O_lg Exp.¹²	O_nuc	O_lg	O_lg Exp.¹²

pNPP/pNPMP	7.0	1.007	1.017	1.0170	0.996	1.017	1.0129
pCNPP/pCNPMP	8.0	1.007	1.015	–	0.991	1.027	–
mCNPP/mCNPMP	8.6	1.009	1.015	–	0.989	1.029	–
mCLPP/mCLPMP	8.8	1.008	1.016	–	0.988	1.033	–
pCLPP/pCLPMP	9.3	1.005	1.017	–	0.986	1.033	–
PP/PMP	10.0	1.002	1.017	–	0.986	1.035	–
pMPP/pMPMP	10.2	1.001	1.017	–	0.986	1.037	–