Table : Key descriptors of the potential energy surfaces spanned by the PC and ET vectors. Energetic positions of the transition state (TS) and product minimum relative to the reactant minimum, as well as coupling strength and inner-reorganization energies in ⃗ q direction; Positions of minima and transition states in [⃗ p, ⃗ q] coordinates; Projections and corresponding angles of ⃗ p and ⃗ q vectors to the line of concertedness ( ⃗ d) defined as the line connecting reactant and product minima; Quantitative degrees of coupling and concertedness.