The endo isomer (Fig. ) exhibits clear points at which the TS barrier energy is maximized (white circle in the red region) and minimized (white circle in the blue region) for this choice of cavity parmeters. We define these critical points as (ϕ 1 , θ 1 ) = (3. Coupling Strength, 𝐴𝐴 0 (a.u.) the critical points (ϕ 1 , θ 1 ) and (ϕ 2 , θ 2 ). However, for the exo isomer (Fig. ), the critical points are located at (ϕ 3 , θ 3 ) = (11.5 • , 103.1 • ) and (ϕ 4 , θ 4 ) = (114.6 • , 126.1 • ). Hence, the Yaxis direction is far from either of the extrema for the exo case. In fact, the Y-direction lies on the border between the stabilizing region (blue) and the destabilizing region (red). In both cases, the Z-direction is far from any critical point, implying that this direction of cavity polarization is not optimal in either isomer. Later, in Fig. that the Z-polarization can still be valuable in cavity-induced selectivity even though both isomers experience a mediocre cavity effect individualy.