2-吡嗪甲酸钐配合物的合成与表征的论文稿.doc

摘 要 本文以2-吡嗪甲酸和SmCl3·6H2O反应得到2-吡嗪甲酸钐配合物，并用X-射线单晶结构分析进行表征。X-射线单晶结构分析表明：2-吡嗪羧酸钐配合物属于正交晶系，空间群为Pbcn。相关晶胞参数：a= 16.154(3)? , b= 12.357(3)? , c= 20.525(4)? , a= β = g = 90o，V=4097.1。配合物中钐原子被三个氮原子六个氧原子包围，形成一个稍微畸变的9配位化合物，其中只有一个配位氧原子来自水分子而其他配位氧原子则由2-吡嗪羧酸配体提供。通过相邻配体氢键作用形成三维超分子网状结构。 。 关键词：2-吡嗪羧酸；钐配合物；氢键；晶体结构；表征 Abstract The coordination compound {[Sm(pya)3(H2O)]( H2O)3}n was obtained by reaction of 2-pyrazinecarboxylic Acid (Hpya) with SmCl3·6H2O,and it was characterized by X-ray diffraction single-crysture analyses indicate that the compound crystallize in( ),space group ( ), unit cell parameters related to: a= 16.154(3)? , b= 12.357(3)? , c= 20.525(4)? , a= β = g = 90o，V=4097.1。The complex of Sm(Ⅲ) atom surrounded by three ( ) atoms and tow oxygen atoms form a slightly distorted with nine atoms coordination, in which one ligand oxygen atom from a water molecule with other ( )atoms by 2 –pyrazine carboxylic acid ligands provided. Key words: 2-pyrazinecarboxylic Acid; Samarium complex; Hydragen bonds; crystal structure; characterization 目 录 TOC \o 1-3 \h \z HYPERLINK \l _Toc232312731 摘 要 PAGEREF _Toc232312731 \h I HYPERLINK \l _Toc232312732 前 言 PAGEREF _Toc232312732 \h 1 HYPERLINK \l _Toc232312733 1 文献综述 PAGEREF _Toc232312733 \h 2 HYPERLINK \l _Toc232312734 1.1 PAGEREF _Toc232312734 \h 2 HYPERLINK \l _Toc232312735 1.1.1 PAGEREF _Toc232312735 \h 2 HYPERLINK \l _Toc232312736 1.1.2 PAGEREF _Toc232312736 \h 2 HYPERLINK \l _Toc232312737 1.1.2.1 PAGEREF _Toc232312737 \h 3 HYPERLINK \l _Toc232312738 1.1.2.2 PAGEREF _Toc232312738 \h 3 HYPERLINK \l _Toc232312739 1.1.2.3 PAGEREF _Toc232312739 \h 3 HYPERLINK \l _Toc232312740 1.2 PAGEREF _Toc232312740 \h 4 HYPERLINK \l _Toc232312741 1.2.1 PAGEREF _Toc232312741 \h 4 HYPERLINK \l _Toc232312742 1.2.1.1 PAGEREF _Toc232312742 \h 4 HYPERLINK \l _Toc232312743 1.2.1.2 PAGEREF _Toc232312743 \h 4 HYPERLINK \l _Toc232312744 1.2.1.3 PAGEREF _Toc232312744 \h 4 HYPERLINK \l _Toc232312745 1.2.1. PAGEREF _Toc232312745 \h