A series of magnesium complexes of general formula [Mg(Tpx)2] (Tpx = Tp, Tp*, Tp*Cl, pzTp) and [Mg(Tpx)X] (X = Cl, Tpx = TptBu or pz0Tpp-Tol; X = acetate, Tpx = TptBu) were synthesised from magnesium chloride or acetate and M(Tpx) (M = K, Na or Tl) in dichloromethane or alcoholic solution. These compounds are air-stable solids, sparingly soluble in most organic solvents; they have been characterized by elemental analysis, IR, 1H and 13C NMR spectra and, in selected cases, also by conductivity and molecular weight measurements. Single crystal X-ray diffraction studies of [Mg(Tp)2], [Mg(Tp*)2] and [Mg(Tp*Cl)2] show unsolvated neutral bis(tripod ligand)magnesium(II) molecules with six-coordinate magnesium atoms (left angle bracketMg–Nright-pointing angle bracket 2.167(6), 2.19(2), 2.205(4) Å).
Marchetti, F., Pettinari, C., Pettinari, R., Skelton, B., & White, A. (2009). Magnesium (II) poly(pyrazolyl)borate derivatives - Synthesis, spectral and structural studies. Inorganica Chimica Acta, 362(12), 4480-4485. https://doi.org/10.1016/j.ica.2009.05.006