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Table 1

CVT/SCT rate constants (in s−1) for the cis to trans and trans to cis isomerization reactions of thioformic [HC(O)SH] and formic acids [HC(O)OH] and trans/cis ratios.

T(K) Thioformic acid [HC(O)SH] Formic acid [HC(O)OH]

KCVT/SCT [cis to trans] KCVT/SCT [trans to cis] K1/K−1 KCVT/SCT [cis to trans] KCVT/SCT [trans to cis] K1/K−1
10 6.04E−26 5.14 E−40 1.17E+14 3.73E−21 1.79E−109 2.09E+88
20 3.03E−16 2.78E−23 1.09E+07 1.67E−09 1.14E−53 1.47E+44
30 7.34E−13 1.49E−17 4.93E+04 1.64E−05 5.82E−35 2.82E+29
40 4.74E−11 1.43E−14 3.32E+03 1.89E−03 1.53E−25 1.23E+22
50 7.65E−10 1.17E−12 6.57E+02 3.65E−02 7.70E−20 4.74E+17
60 7.04E−09 3.16E−11 2.23E+02 2.89E−01 5.36E−16 5.40E+14
70 6.04E−08 5.85E−10 1.03E+02 1.39E+00 3.26E−13 4.26E+12
80 7.31E−07 1.26E−08 5.78E+01 4.93E+00 4.37E−11 1.13E+11
90 1.44E−05 3.90E−07 3.69E+01 1.46E+01 2.18E−09 6.70E+09
100 3.23E−04 1.26E−05 2.57E+01 3.88E+01 5.54E−08 7.00E+08
110 5.90E−03 3.09E−04 1.91E+01 9.82E+01 8.91E−07 1.10E+08
120 7.81E−02 5.23E−03 1.49E+01 2.47E+02 1.05E−05 2.36E+07
130 7.55E−01 6.24E−02 1.21E+01 6.36E+02 9.93E−05 6.41E+06
140 5.53E+00 5.47E−01 1.01E+01 1.68E+03 8.00E−04 2.09E+06
150 3.20E+01 3.71E+00 8.64E+00 4.45E+03 5.60E−03 7.94E+05
160 1.52E+02 2.02E+01 7.53E+00 1.16E+04 3.42E−02 3.40E+05
170 6.08E+02 9.12E+01 6.67E+00 2.93E+04 1.82E−01 1.61E+05
180 2.11E+03 3.52E+02 5.99E+00 7.02E+04 8.50E−01 8.26E+04
190 6.47E+03 1.19E+03 5.43E+00 1.60E+05 3.51E+00 4.55E+04
200 1.79E+04 3.59E+03 4.97E+00 3.43E+05 1.29E+01 2.66E+04
220 1.05E+05 2.45E+04 4.27E+00 1.36E+06 1.29E+02 1.05E+04
240 4.63E+05 1.23E+05 3.77E+00 4.47E+06 9.23E+02 4.84E+03
260 1.64E+06 4.86E+05 3.38E+00 1.26E+07 5.02E+03 2.51E+03
280 4.90E+06 1.59E+06 3.08E+00 3.12E+07 2.18E+04 1.43E+03
300 1.27E+07 4.47E+06 2.84E+00 6.94E+07 7.92E+04 8.76E+02
320 2.94E+07 1.11E+07 2.65E+00 1.41E+08 2.47E+05 5.70E+02
340 6.18E+07 2.48E+07 2.49E+00 2.66E+08 6.81E+05 3.91E+02
360 1.20E+08 5.09E+07 2.35E+00 4.70E+08 1.69E+06 2.79E+02
380 2.18E+08 9.71E+07 2.24E+00 7.87E+08 3.82E+06 2.06E+02
400 3.72E+08 1.74E+08 2.14E+00 1.26E+09 8.00E+06 1.57E+02

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