When DFT or CC fails, then multireference methods are often the methods of choice in chemistry. In these methods one uses the “diagonalize-then-perturb” strategy, whereby the Hamiltonian is first ...
Accuracy and speedup achieved with the Weighted Active Space Protocol (WASP) for methane activation on titanium carbide. (Figure courtesy of Seal et al.) Catalysts play an indispensable role in modern ...