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Search of manifolds of nonsymmetric Valley-Ridge inflection points on the potential energy surface of HCN


The potential energy surface (PES) of a chemical reaction contains Valley-Ridge inflection points (VRI) if—an often occurring phenomenon—the reaction path branches. In this paper, we introduce a new direct search method to detect these VRI points. It is based on an inductive execution of Gauss–Newton steps. For the first time, we were able to find not only singular nonsymmetric VRI points, but also whole VRI manifolds on the PES of HCN.

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Correspondence to Wolfgang Quapp.

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Schmidt, B., Quapp, W. Search of manifolds of nonsymmetric Valley-Ridge inflection points on the potential energy surface of HCN. Theor Chem Acc 132, 1305 (2013).

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  • Potential energy surface
  • Valley-Ridge inflection
  • Point bifurcation of reaction paths
  • Manifold of VRIs