Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (7): 20250357.doi: 10.7503/cjcu20250357
• Physical Chemistry • Previous Articles Next Articles
MO Yonghang, LIU Yongdong(
), ZHONG Rugang
Received:2025-11-25
Online:2026-07-10
Published:2026-01-30
Contact:
LIU Yongdong
E-mail:ydliu@bjut.edu.cn
Supported by:CLC Number:
TrendMD:
MO Yonghang, LIU Yongdong, ZHONG Rugang. Determination of Main Products and Their Yields in Competitive Reactions Governed by Kinetics and Thermodynamics Using Quantum Chemical Computation[J]. Chem. J. Chinese Universities, 2026, 47(7): 20250357.
| Glycoside | Reactive site | tc for two sites in the parenthesis/s | Main product by Eq.(9) | Yield by Eq.(8)(%) | Yield by numerical method(%) | Error of yield(%) | APT charge | ESP | CFF f- | CDD |
|---|---|---|---|---|---|---|---|---|---|---|
| Uridine | N3 | 9.3×103(N3—C5) 8.2×1042(C5—C6) | 5⁃Cl⁃ Uridine | 0.16 | 0.34 | 0.18 | -1.13 | 2.77 | 0.035 | 0.029 |
| C5 | 99.84 | 99.66 | 0.12 | -0.72 | 3.79 | 0.141 | -0.004 | |||
| C6 | 0 | 0 | 0 | 0.75 | 10.75 | 0.065 | 0.182 | |||
| Thymidine | N3 | 1.2×107(N3—C5) 9.2×1024(C5—C6) | 3⁃Cl⁃ Thymidine | 99.51 | 99.43 | 0.08 | -1.10 | 1.87 | 0.031 | 0.035 |
| C5 | 0.49 | 0.50 | 0.01 | -0.52 | 5.71 | 0.148 | -0.021 | |||
| C6 | 0 | 0 | 0 | 0.70 | 8.88 | 0.086 | 0.142 | |||
| Cytidine | N3 | 1.1×10-4(N3—N4) 6.3×106(N4—C5) ∞(C5—C6) | N4⁃Cl⁃ Cytidine | 2×10-6 | 2×10-6 | 0 | -1.43 | -44.24 | 0.129 | -0.038 |
| N4 | 99.05 | 98.93 | 0.12 | -1.29 | 1.67 | 0.096 | -0.015 | |||
| C5 | 0.95 | 1.03 | 0.08 | -0.76 | 4.46 | 0.125 | -0.011 | |||
| C6 | 0 | 0 | 0 | 0.70 | 2.55 | 0.143 | 0.174 |
Table 1 Critical time tc, main products obtained from Eq.(12), 24 h yields of chlorinated products obtained from Eq.(8) and numerical method, and four parameters including APT charge, ESP, CFF f - and CDD for each reactive site of pyrimidine nucleosides during chlorination*
| Glycoside | Reactive site | tc for two sites in the parenthesis/s | Main product by Eq.(9) | Yield by Eq.(8)(%) | Yield by numerical method(%) | Error of yield(%) | APT charge | ESP | CFF f- | CDD |
|---|---|---|---|---|---|---|---|---|---|---|
| Uridine | N3 | 9.3×103(N3—C5) 8.2×1042(C5—C6) | 5⁃Cl⁃ Uridine | 0.16 | 0.34 | 0.18 | -1.13 | 2.77 | 0.035 | 0.029 |
| C5 | 99.84 | 99.66 | 0.12 | -0.72 | 3.79 | 0.141 | -0.004 | |||
| C6 | 0 | 0 | 0 | 0.75 | 10.75 | 0.065 | 0.182 | |||
| Thymidine | N3 | 1.2×107(N3—C5) 9.2×1024(C5—C6) | 3⁃Cl⁃ Thymidine | 99.51 | 99.43 | 0.08 | -1.10 | 1.87 | 0.031 | 0.035 |
| C5 | 0.49 | 0.50 | 0.01 | -0.52 | 5.71 | 0.148 | -0.021 | |||
| C6 | 0 | 0 | 0 | 0.70 | 8.88 | 0.086 | 0.142 | |||
| Cytidine | N3 | 1.1×10-4(N3—N4) 6.3×106(N4—C5) ∞(C5—C6) | N4⁃Cl⁃ Cytidine | 2×10-6 | 2×10-6 | 0 | -1.43 | -44.24 | 0.129 | -0.038 |
| N4 | 99.05 | 98.93 | 0.12 | -1.29 | 1.67 | 0.096 | -0.015 | |||
| C5 | 0.95 | 1.03 | 0.08 | -0.76 | 4.46 | 0.125 | -0.011 | |||
| C6 | 0 | 0 | 0 | 0.70 | 2.55 | 0.143 | 0.174 |
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