{Bis[N,N′-dicyclo­hexyl-N′′,N′′-bis­(tri­meth­yl­sil­yl)guanidinato-κ²N,N′]neo­dymium(III)}di-μ-chlorido-[bis­(tetra­hydro­furan-κO)lithium]

In the title monomeric rare earth complex, [LiNd(C₁₉H₄₀N₃Si₂)₂Cl₂(C₄H₈O)₂], the [(Me₃Si)₂NC(NCy)₂]₂Nd⁺ (Me is methyl, Cy is cyclo­hex­yl) and Li(THF)₂⁺ units (THF is tetra­hydro­furan) are connected by two bridging Cl atoms. The Nd³⁺ ion is coordinated by two guanidinate ligands and two Cl atoms, forming a distorted chelating octa­hedral geometry. The Li⁺ ion is four-coordinated by two Cl atoms and two O atoms from THF mol­ecules in a distorted tetra­hedral geometry.

Bis{μ₄-N-[phen­yl(pyridin-2-yl­aza­nid­yl)meth­yl]pyridin-2-aminido}tetra­kis(tetra­hydro­furan)­tetra­lithium

The title complex, [Li₄(C₁₇H₁₄N₄)₂(C₄H₈O)₄], bears a novel tetra­dentate di­amido ligand. In the tetra­nuclear centrosymmetric complex mol­ecule, the metal atoms exhibit two kinds of coordination modes. The middle two Li⁺ cations are coord­inated by four N (ligand) and one O (tetra­hydro­furan, THF) atoms, resulting in a distorted square-pyramidal geometry. The outer two Li⁺ cations are in distorted tetra­hedral environments consisting of three N (ligand) and one O (THF) atoms. The Li—N bond lengths vary from 2.020 (7) to 2.441 (6)Å.