Synthesis and Crystal Structure of Lanthanum（Ⅲ） Complex of 3,5-Dinitrobenzoate
来源期刊：Journal of Rare Earths2006年第S2期
论文作者：杨光
文章页码：11 - 13
摘 要：The lanthanum 3, 5-dinitrobenzoate La（dnb）3·1.5DMF with one-dimensional chain was prepared by diffusion of Et3N into a solution of LaCl3 and 3,5-dinitrobenzoic acid in MeOH-CH3CN-DMF mixed solvent （dnb=3,5-dinitrobenzoate）. X-ray analysis reveals that the La atom is either eight-coordinate in a square antiprismatic geometry （La1） or nine-coordinate in an irregular geometry （La2）. Within the polymeric chain, La atoms are collocated in the sequence of …La1…La1…La2…La2…La1…La1…. The two neighboring La atoms are bridged by four, two or three μ2-carboxylates of dnb ligand for La1…La1, La2…La2 and La1…La2/La2…La1 units, respectively. The crystal is triclinic with space group P-1, a=1.4627（6） nm, b=1.5930（12） nm, c=1.7099（12） nm, α=102.590（10）°, β=92.370（10）°, γ=117.250（10）°, V=341.1（4） nm-3.
杨光
摘 要：The lanthanum 3, 5-dinitrobenzoate La（dnb）3·1.5DMF with one-dimensional chain was prepared by diffusion of Et3N into a solution of LaCl3 and 3,5-dinitrobenzoic acid in MeOH-CH3CN-DMF mixed solvent （dnb=3,5-dinitrobenzoate）. X-ray analysis reveals that the La atom is either eight-coordinate in a square antiprismatic geometry （La1） or nine-coordinate in an irregular geometry （La2）. Within the polymeric chain, La atoms are collocated in the sequence of …La1…La1…La2…La2…La1…La1…. The two neighboring La atoms are bridged by four, two or three μ2-carboxylates of dnb ligand for La1…La1, La2…La2 and La1…La2/La2…La1 units, respectively. The crystal is triclinic with space group P-1, a=1.4627（6） nm, b=1.5930（12） nm, c=1.7099（12） nm, α=102.590（10）°, β=92.370（10）°, γ=117.250（10）°, V=341.1（4） nm-3.
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