[Bis­(trimethylsilyl)amido‐κN]{tert‐butyl[(E)‐2‐(tert‐butyl­imino)­ethyl]amido‐κ2N,N′}tin(II), a key inter­mediate in the synthesis of 1,3‐di‐tert‐butyl‐2,3‐dihydro‐1H‐1,3,2‐diaza­stannole

The title compound, Sn(C₁₀H₂₁N₂)(C₆H₁₈NSi₂)], contains the Sn^II centre in a trigonal–pyramidal geometry. The basal plane is formed by three N atoms and the fourth apical position is occupied by a stereoactive lone pair. The Sn atom is displaced from the plane of the three N atoms by 1.1968 (12) Å. The Sn—N bonds are highly polarized toward the N atoms, as confirmed by natural bonding orbital analysis.