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Table A.1

Geometries (lengths in Å and angles in °) of the stationary points for the HCl + (X2Π) + H2(X1Σg) → H2Cl+(X1A1) + H(2S) reaction.

Species Level RHH′ RHH′′ RH′′Cl ΘHH′Cl ΘH′′ClH′ ΦHH′ClH′′

H2 + HCl+ ab initio 0.74148 1.31596

PES 0.74151 1.31585

TS1 ab initio 0.75063 2.06285 1.31670 82.48 41.22 81.34

PES 0.75046 2.05911 1.31666 82.45 41.26 81.31

M2 ab initio 0.79532 2.39800 1.30530 79.03 87.34 89.36

PES 0.79498 2.39768 1.30559 78.95 87.25 89.46

TS2 ab initio 0.80189 2.48691 1.30501 99.13 88.31 84.33

PES 0.80166 2.48873 1.30524 99.04 88.61 83.59

M3 ab initio 1.38323 3.13620 1.30247 179.24 94.35 180.00

PES 1.38748 3.14005 1.30261 179.22 94.38 180.00

H + H2Cl+ ab initio 1.30554 94.38

PES 1.30542 94.38

Notes. “Ab intio” refers to the UCCSD(T)-F12/ cc-pVQZ-F12 optimized values while “PES” refers to the fitted values.

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