Tetra­chlorido­[N²,N^2′-(di­methyl­silanedi­yl)bis­(N-tert-butyl-3-methyl­benzimid­amid­ato)-κ²N²,N^2′]hafnium(IV)

The symmetric title mol­ecule, [Hf(C₂₆H₄₀N₄Si)Cl₄], lies about a twofold rotation axis. The Hf^IV and Si atoms lie on the rotation axis with all other atoms being in general positions. The Hf^IV atom is six-coordinated by two N atoms from the N²,N^2′-(di­methyl­silanedi­yl)bis­(N-tert-butyl-3-methyl­benz­imid­amidate) ligand and four Cl⁻ ions in a slightly distorted octa­hedral geometry. The two amidinate moieties are connected through the central Si atom with Si—N bond length of 1.762 (3) Å, generating the characteristic N—C—N—Si—N—C—N skeleton of a silyl-linked ansa-bis­(amidine) species.