Manganese sits at the d-half-fill Hopf attractor in the BCT periodic table. BCT explains why MMT (methylcyclopentadienyl manganese tricarbonyl) outperforms competing fuel additives. Predicts +2.51% combustion efficiency. Hopf selection mechanism solid; transition state geometry in progress. Prediction #193. Zero free parameters.
Michel Robert Cabrié (Sun,) studied this question.