As shown in Figure , the coordination of hydroxylamine HA to A1 exergonically gives an 18-electron complex A2. Subsequently, an intramolecular deprotonation of A2 takes place, resulting in the liberation of acetic acid and the formation of a metal-amide complex, A3, characterized by a reaction barrier of 10.4 kcal/mol. Then, the 5-coordinated complex A3 engages an additional base, forming a cesium-bound complex, A4. Notably, A4 serves as a resting intermediate, associated with an energy change of -11.6 kcal/mol.