Crystal structures of the complexes of rare earth picrates with N, N, N', N'-tetraphenyl-3

• 作 者: 刘伟生 柳士霞 谭民裕 郁开北 谭干祖
• 机 构: Department of Chemistry,Lanzhou University,Lanzhou 730000,China,Department of Chemistry,Lanzhou Univ
• 出 处: Science in China(Series B)
• 发表日期: 1997年03期
• 关键词: complexes tetraphenyl-3 ionic bidentate participation monomer distorted radius y

The complexes of rare earth picrate with N,N,N’,N’-tetraphenyl-3,6-dioxaoctanediamide(TDD),Eu(picc(TDD)] 2CH3CN and [ Y(pic)3(TDD)],have been synthesized.The crystal structures reveal that TDD at is as n tetradentate ligand,forming a ring-like coordination structure with its oxygen atoms together with one oxygen atom of the bidentate pterate In the Eu(Ⅲ) complex,the europium ion with a larger ionic radius lies out of the ring,while in the Y(Ⅲ) complex,the yttrium ion with a smaller ionic radius enters the cavity of the ligand.The structures of the complexes are greatly affected by the ionic radii due to participation of the picrates in coordination.