HyDRA II Blind Challenge

HyDRA is a blind prediction challenge to establish the predictive power of computational spectroscopy for small complexes of organic molecules with water. The quantity to predict is the hydrogen-bonded OH bond stretching fundamental of water relative to the free water value of 3657 cm^-1 (experimental symmetric stretch). You can read more about the challenge on our flyer. The official start of HyDRA II was on the 16.09.2025.