Pitfalls and Limitations in Group 6 Triamidophosphane Chemistry: Cage‐Closure Restrictions in Square‐Pyramidal Nitrido Complexes and Degradation via Spiro‐[4.4]‐λ
<sup>5</sup>
‐Amidophosphorane Formation
residual dimethylamido moiety and one uncoordinated ligand sidearm. Only the [A]-coordinated complex 1 was found to eliminate the remaining dimethylamide upon heating. Instead of the closed-cage molybdenum(VI) nitride [A]Mo≡N, a cyclometalated molybdaziridine (3) was isolated, as the syn-alignment of the uncoordinated sidearm and the nitride in 1 inhibits a productive cage-closure reaction. Using [NPN]-coordinated