双齿甜菜碱衍生物大环及双环镉(Ⅱ)配位化合物的合成与晶体结构(英文)  

Synthesis and Crystal Structures of Cadmium(Ⅱ) Coordination Compounds of Large Ring and Bicyclo Framework with a Bidentate Betaine Derivative

作　　者：辛清萍[1] 李松林[1] 刘雪佳[2] 

机构地区：[1]天津大学理学院化学系,天津300072 [2]北京航空材料研究院,北京100095

出　　处：《无机化学学报》2012年第4期815-822,共8页Chinese Journal of Inorganic Chemistry

摘　　要：利用甜菜碱衍生物1,5-二(4-羧基吡啶基)-N-甲基二乙胺(L)合成了两种镉(Ⅱ)的配位化合物[Cd2Cl4(H2O)2L2].2H2O和[Cd2(SCN)4(μ-H2O)L2]。用X-射线单晶衍射仪测定了配合物的单晶结构,并对它们进行了元素分析、红外光谱、1H NMR、热重等表征。结构分析表明,前者具有三十六元大环框架,而后者为双环结构。由于缺乏分子之间的强烈相互作用,弱相互作用决定了这两种化合物在晶格中的堆积模式:前者由相邻分子间的π-π和C-H…π相互作用而堆积形成二维砖墙的结构;后者由配位的SCN-阴离子通过S…S弱相互作用联接成一维链状结构。A new bidentate betaine derivative 1,5-bis（4-carboxypyridinium）-N-methyl-diethylamine （L） was prepared and allowed to react with cadmium salts leading to the formation of two new cadmium coordination compounds [Cd2CI4（H20）2L2] 2H2O and [Cd2（SCN）4（/x-H20）L2], which were structurally characterized by IR spectoroscopy, single- crystal X-ray diffraction, elemental analysis, thermal analysis, etc. The single crystal X-ray diffraction structure analysis of these compounds shows the molecule of former consists of discrete 36-membered ring and that of latter bicyclo [17.17.1] structure. Owing to lacking strong intermolecular interactions in these compounds, weak interactions determine their packing pattern in crystalline state： the former forms 2D brick-wall network by the 7r- π stacking and C-H.＇. π interactions between pyridyl rings of adjacent molecules, and the latter zig-zag chains through S.＇.S weak interactions between ligating SCNanions. CCDC： 860582, 1; 860585, 2.

关 键 词：双齿甜菜碱衍生物 镉(Ⅱ)配合物 Π-Π堆积 C-H…π作用 S…S作用 

分 类 号：O614.242[理学—无机化学]