摘要:
The macrocyclic diamino diamine (1,7-Me(2)TACD)H-2 (1,7-Me(2)TACD = 1,7-dimethyl-1,4,7,10-tetraazacyclododecane, 1,7-Me-2[12]aneN(4)), reacted under propylene elimination with [Ln(eta(3)-C3H5)(3)(diox)] (Ln = Y, La) to give the mono(allyl) complexes [(1,7-Me(2)TACD)Ln(eta(3)-C3H5)](2) (Ln = Y (1a), La (1b)). A single-crystal X-ray diffraction study shows 1b to be a centrosymmetric dimer with lanthanum atoms bridged by one of the two amido nitrogen atoms. Complexes 1a,b were treated with 2 equiv of the potassium allyl KC3H5 to give the corresponding heterometallic allyl complexes [(1,7-Me(2)TACD)Ln(eta(3)-C3H5)(2)K(THF)](n) (Ln = Y (2a), La (2b)). A single-crystal X-ray diffraction study revealed that 2a,b are polymeric in the solid state with allyl ligands bridging the metal centers in addition to the presence of mu(2)-amido functions of the 1,7-Me(2)TACD ligand. Hydrogenolysis of the yttrium compound 2a with 1 bar of H-2 led to the formation of the heterometallic Y4K2 hydrido complex [(1,7-Me(2)TACD)(2)Y2H3K(THF)(2)](2) (3a), which can also be synthesized from a 1:1 mixture of 1a and KC3H5 with 1 bar of H-2. A single crystal X-ray diffraction study of 3a revealed a dimer of heterotrinuclear Y2K trihydride aggregate. Treatment of 2b with 1 bar of H-2 afforded the heptanuclear La3K4 heptahydrido complex [(1,7-Me(2)TACD)(3)La3H7K4(THF)(7)] (3b).