[N,N′-Bis(2,6-diisopropyl­phen­yl)methanimidamidato][η(8)-1,4-bis­(tri­methyl­sil­yl)cyclo­octa­tetra­enyl](tetra­hydro­furan)­samarium(III) toluene monosolvate

The title compound, [Sm(C(25)H(35)N(2))(C(14)H(24)Si(2))(C(4)H(8)O)]·C(7)H(8), was prepared by treatment of anhydrous samarium trichloride with a 1:1 mixture of in situ-prepared Li(DippForm) [DippFormH = N,N′-bis­(2,6-diisopropyl­phen­yl)methanimidamide] and Li(2)(COT′′) [COT′′ = 1,4-bis­(trimethyl­sil­yl)cyclo­octa­tetra­enyl] in tetra­hydro­furan (THF). Despite the presence of two very bulky ligands (COT′′ and DippForm), the mol­ecule still contains one coordinated THF ligand. The overall coordination geometry around the Sm(III) atom resembles a three-legged piano-stool with the COT′′ ligand being η(8)-coordinated and the DippForm(−) anion acting as an N,N′-chelating ligand [Sm—N = 2.5555 (15) and 2.4699 (15) Å]. The asymmetric unit also contains a disordered mol­ecule of toluene, the refined ratio of the two components being 0.80 (4):0.20 (4).