Lanthanide Complexes of Some High Energetic Compounds (II), Crystal Structures and Thermal Properties of Picrate Complexes

Bulletin of the Korean chemical society

Hong-Ryol Suh¹  Eun Kwang Lee¹  Sock-Sung Yun¹  Jae-Kyung Kim¹  Sung Kwon Kang¹  Chong-Hyeak Kim¹  Hyung-Sock Suh¹ 

关键词: Lanthanide complex;    Picric acid;    Thermal analysis;    Crystal structure;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The Ln(III) complexes with picrate ligand, [Sm(Pic)₂(H₂O)₆]Pic·6H₂O, 1, and [Ho(Pic)(H₂O)₇](Pic)₂·3H₂O, 2, have been synthesized and their crystal structures are analyzed by X-ray diffraction methods. Complex 1, crystallizes in the monoclinic P2₁/n space group and complex 2 in the triclinic P-1 space group. In complex 1, two picrate ligands coordinate to the Sm(III) ion, one of them in the bidentate fashion. There are one picrate anion and six water molecules in the crystal lattice. The nine-coordinated Sm(III) ion forms a slightly distorted tricapped trigonal prism. In complex 2, only one picrate ligand coordinates to the metal ion as a monodentate. There are two picrate anions and three water molecules in the crystal lattice. The eight-coordinated Ho(III) ion forms a distorted bicapped trigonal prism. Based on the results of the TG-DTG and DSC thermal analysis, it was analyzed that the lanthanide picrate complexes 1 and 2 are thermally decomposed in three distinctive stages, the dehydration, the picrate decomposition, and the formation of the metal oxide.

【 授权许可】

Unknown