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镝、钬、铒的乙酸二乙酰丙酮—水络合物M—L{[DyC_2H_3O_2·(C_5H_7O_2)2·H_2O]_2、[HoC_2H_3O_2·(C_5H_7O_2)_2·H_2O]_2和[ErC_2H_3O_2·(C_5H_7O_2)_2·HD]2}的晶体结构用X射线衍射法确定。属于同构,三斜晶系,空间群P,Z=1。其晶胞参数分别为:Dy—L,α=7.511(2)、b=8.559(3)、c=13.317(6)、α=84.91(3)°、β=86.05(3)°、γ=66.75(3)°;Ho—L,α=7.522(3)、b=8.551(3)、c=13.275(7)、α=85.00(4)°、β=86.32(4)°、γ=66.75(3)°;Er—L,α=7.472(2)、b=8.536(3)、c=13.225(5)、α=85.00(3)°、β=86.39(3)°、γ=66.90(2)°。 结构用重原子法解出。最后的一致性因子分别为:Dy—L,R=0.0272、R_w=0.0260;Ho—L,R=0.0642、R_w=0.0565;Er—L,R=0.0417、R_w=0.0389。在晶体中,每二个稀土金属离子通过乙酸根中氧原子形成的氧桥相联,组成双核稀土络合物分子。其中每个稀土金属离子是八配位的。
Dy 2 H 3 O 2 · (C 5 H 7 O 2) 2 · H 2 O 2], [HoC 2 H 3 O 2 · (C 5 H 7 O 2) 2 · H 2 O] 2 and [ErC 2 H 3 O 2 · (C 5 H 7 O 2) 2 The crystal structure of HD] 2} was confirmed by X-ray diffraction. Belong to isomorphism, triclinic, space group P, Z = 1. The unit cell parameters are Dy-L, α = 7.511 (2), b = 8.559 (3), c = 13.317 (6), α = 84.91 (3) °, β = 86.05 66.75 (3) °; Ho-L α = 7.522 (3) b = 8.551 (3) c = 13.275 (7) α = 85.00 (4) ° β = 86.32 (4) ° γ = 66.75 (3) °; Er-L α = 7.472 (2) b = 8.536 (3) c = 13.225 (5) α = 85.00 (3) ° β = 86.39 (3) ° γ = 66.90 2. Structure solved by heavy atom method. The final concordance factors were: Dy-L, R = 0.0272, R_w = 0.0260; Ho-L, R = 0.0642, R_w = 0.0565; Er-L, R = 0.0417, R_w = 0.0389. In the crystal, every two rare earth metal ions are linked by an oxygen bridge formed by the oxygen atoms in the acetate to form a dual core rare earth complex molecule. Each of the rare earth metal ions is octameric.