I get a confirmation by opt, but it has some imaginary frequency. So I try to resolve the imaginary frequency by: https://www.researchgate.net/post/How_to_resolve_my_small_imaginary_frequencies?_sg=%2FByzqEwEmc4N0sxotmhs6Nnors%2FrbtzO1y0C9T7YWjxm%2FuLx5UYx8YFHHWiPIAfK

The imaginary frequency has disappeared, but the confirmation has changed a lot.

So I want to prove the conformation is a saddle point . Can you give me some suggestions? The method I think is the potential energy surface scanning.

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