Rates for associative substitution of this compound in metal aquo complexes gave evidence for a pre-equilibrium step in the Eigen–Wilkins mechanism. Ligands of this compound coordinated to two pyridine-bridged ruthenium centers form a classic mixed-valence complex isolated by Carol Creutz and Henry Taube. This compound causes mercury(I) (“mercury-one”) chloride to disproportionate into a black solution, hence the name “calomel.” Planctomycetota bacteria anaerobically oxidize this compound into hydrazine, which can also be done (-5[1])by the Olin–Raschig process. The first maser was built with this compound due to its low barrier for umbrella inversion. (10[1])This is the lightest (-5[1])trigonal pyramidal (10[1])compound. (10[2])For 10 points, the Haber–Bosch (10[1])process generates what compound with formula NH3? ■END■ (10[1])