Research Article

Prediction of Mechanism and Thermochemical Properties of O3 + H2S Atmospheric Reaction

Table 1

Total energies (Hartree), relative energies (kJ/mol) (in parentheses) including ZPE corrections at the B3LYP/6-311++G(3df,3pd) and CCSD(T)//B3LYP methods, ZPE (Hartree), and T1 diagnostic for various species.

speciesB3LYP/6-311++G(3df,3pd)CCSD(T)/6-311++G(3df,3pd)ZPET1

H2S + O3−624.9053 (0)−624.0099 (0)0.0224
TS1−624.8647 (106.53)−623.9442 (172.63)0.02370.099
TS2−624.8809 (63.65)−623.9678 (110.69)0.02500.047
TS3−624.8880 (45.33)−623.9768 (86.92)0.02350.043
TS4−624.9069 (−4.41)−624.0015 (22.14)0.02620.041
TS5−624.8634 (110.05)−623.9495 (158.65)0.02460.047
C1−624.9063 (−2.74)−624.0121 (−5.78)0.02390.023
C2−624.8890 (42.76)−623.9869 (60.40)0.02740.042
C3−624.9690 (−167.30)−624.0811 (−186.98)0.02930.029
H2SO–O2−624.9468 (−109.12)−624.0741 (−168.55)0.02700.014
HSOOOH−624.9551 (−130.76)−624.0678 (−151.96)0.02900.021
TS6 + H2O−624.8529 (137.47)−623.9998 (26.46)0.0248
TS6−548.4097−547.67070.00350.046
SOO−548.5234−547.74620.00560.027
SO2−548.7090−547.94490.00700.022
H2SO + 3O2−625.0074 (−268.10)−624.1236 (−298.39)0.0262
H2SO + 1O2−624.9461 (−107.25)−624.0666 (−148.89)0.0262
HSO + HOO−624.9478 (−111.74)−624.0812 (−187.24)0.0245
H2O + SO2−625.1521 (−648.19)−624.2740 (−693.29)0.0283
H2O + SOO−624.9666 (−160.91)−624.0753 (−171.62)0.0269