Three- and four-co-ordinate, hydrocarbon-soluble-aryloxides of scandium, yttrium, and the lanthanoids; X-ray crystal structure of tris(2,6-di-t-butyl-4-methylphenoxo)scandium

Abstract

Five new classes of crystalline, hydrocarbon-soluble group 3A metal (M) aryloxides are reported: [M(OAr)₃], (1), [M(L)(OAr)₃][L = tetrahydrofuran (thf) or P(O)Ph₃], [M(OAr)₂(µ-OAr)₂Na(thf)₂], Li[Yb(Cl)(OAr)₃], and [{Y(Cl)(OAr)(µ-OAr)}₂](Ar = C₆H₂Me-4-Bu^t₂-2,6), ranging for (1) from M³⁺ being the 3d°, 4d°, to the 4fⁿ(n= 0, 1, 2, 3, 9,10, 11, or 13) ion; the title compound (1)(M = Sc) has an approximately trigonal planar ScO₃ skeleton (Sc 0.13 Å out of the O₃ plane) with av. Sc–O 1.869(15)Å, av. O–Sc–O 119.5(2)°, and av. Sc–O–C 168.4(5)°