In Table , the step-by-step process has an enthalpic term decreasing from ΔrH= +248 ± 6 kJ/mol to +116 ± 2 kJ/mol for the first and second In-CH3 dissociation steps (see Eqs. (7-8)), respectively, with slight effect resulting from temperature variation. For matters of comparison, ΔrG diminishes from between +173 and +222 kJ/mol to between -27 and +63 kJ/mol, values that are also affected by the more favourable entropy from the second event. Finally, the C2H6 release is a barrierless step with rate constant kfwd of ~10 +12 m 3 /mol.s and ΔrH= -353 to -359 kJ/mol.