新型五配位三角双锥锰配位聚合物的合成与晶体结构

Synthesis and crystal structures of manganese(Ⅱ) co-ordination compounds of large ring framework with a bidentate betaine derivative

在合成新型双羧基配体1,5-二(4-羧基吡啶基)-N-甲基二乙胺,通过与MnCl2反应,合成了锰(Ⅱ)的配位聚合物{[MnL2Cl2].2H2O}n。通过单晶X射线衍射方法进行了表征。晶体结构表明,该配合物属于三斜晶系,结晶于P-1(no.2)空间群,其晶胞参数为:a=0.8348(5)nm、b=1.0775(5)nm、c=1.1535(5)nm、α=90.706(5)°、β=92.465(5)°、γ=91.062(5)°,具有三十六元大环框架,由于缺乏分子之间的强烈相互作用,π-π弱相互作用和氢键决定了这两种化合物在晶格中的堆积模式,为新型五配位三角双锥锰配位聚合物。

A new bidentate betaine derivative 1,5-bis（4-carboxypyridinium）-N-methyl-diethylamine （L） was pre- pared and allowed to react with manganese salts leading to the formation of one new manganese coordina-tion compounds {[MnL2C12]·2H20}. which was structurally characterized by IR spectoroscopy, single-crystal X- ray diffraction. The single crystal X-ray diffraction structure analysis of these compounds shows the molecule consists of discrete 36-membered ring structure. Owing to lacking strong intermolecular interactions in these compounds, weak interactions determine their packing pattern in crystalline state, such as n-n stacking and hy- drogen bonding interactions.