[Bis(trimethylsilyl)amido-kappaN]{tert-butyl[(E)-2-(tert-butylimino)ethyl]amido-kappa(2)N,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) A. The Sn-N bonds are highly polarized toward the N atoms, as confirmed by natural bonding orbital analysis.