Feshbach resonances of a chemical reaction are dynamically trapped quantum states along the reaction coordinate in the interaction region with some lifetime 1 . They can strongly influence physical observables including rate constants, excitation functions, the product rovibrational state distributions, and angular distributions. In some cases, the trapped resonance state is localized close to the saddle point of the potential energy surface (PES), which has been well studied in reactions such as F + H 2 /HD/HOD(v=1)/NH 3 /CHD 3 2,3,4, . In other cases, the trapping may occur at relatively long distances, associated with shallow van der Waals (vdW) or hydrogen bond (HB) wells situated in the entrance or exit channels .