A popular approach in automated TS procedures is to either skip the IRC step and use alternative validation procedures for the TS or first screen the TS with alternative validation procedures before doing the IRC in an effort to save computational time . Though the TS validation here is based on the IRC path and whether it connects the reactant and product, some of these alternative approaches are also tested. In particular, the TS vetting requirements suggested by Jacobson et al. are tested. The three requirements are: 1) There should be exactly 1 imaginary frequency of the Hessian, 2) at least one of the active bonds (bonds being broken or formed during the reaction) should have an intermediate length, and 3) that the eigenvector corresponding to the imaginary frequency should have motion along at least one of the active bond stretching modes. We use the same cutoff values for when a bond length is considered intermediate and when it is considered that the eigenvector has motion along a bond stretching mode as in the original article, that is: A bond length r i j between atom i and j is considered intermediate if