Fig. 10. Top: NMR shielding tensor orientations of selected yttrium complexes (OAr = 2,6-di-tert-butyl-4-methylphenoxy). For complexes with non-planar geometry of the three anionic ligands, the pyramidalization θ is given below the complex name. The depicted values represent the shielding along the three principal components of the respective shielding tensor. Colour code: σ₁₁ = red, σ₂₂ = green and σ₃₃ = blue. Bottom: DFT calculated solid state ⁸⁹Y NMR of various organo-yttrium-complexes reported in literature.15 The isotropic chemical shifts are depicted in green, blue and red for carbon, nitrogen and oxygen based ligands, respectively.