for the dominant disorder component with a N-Dy-N angle of 150.1(5)°. It is evident that the crystal field splitting generated by the more charge-dense bis(silyl)amides in 1-Dy is greater than previously seen for related axial dysprosium complexes containing more charge-diffuse anionic aromatic ligands . For example, [Dy(Cp ttt ). Dashed blue line is given by τ -1 = 10 -A exp[-Ueff/kT], dotted orange line is given by τ -1 = 10 R T n , and dotted green line is given by τ -1 = 10 .