【摘要】 目的合成高价锰配合物并研究其晶体结构。方法席夫碱配体H2salae(水杨醛缩乙醇胺)与Mn(OAc)3.2H2O在甲醇-水混合溶剂中反应,溶液静置,溶剂挥发后得到单晶。结果配合物MnIV(salae)2的单晶属六方晶系,空间群R-3,晶胞参数:a=1.7907(1)nm,b=1.7907(1)nm,c=2.8162(3)nm,α=90°,β=90°,γ=120°,V=7.8201(1)nm3,Z=18,Mr=381.28,Dc=1.457 g/cm3。结论MnIV由两个席夫碱配体进行配位,每个配体提供两个氧原子和一个氮原子。中心锰IV处于八面体的配位环境中。不同单元的分子由分子间C—H…O氢键和C—H…π弱相互作用连接在一起,形成三维结构。更多还原

【Abstract】 Aim To synthesize a high valence manganese complex and discuss its structure.Methods The ligand H2salae(H2salae=salicylideneamino ethane) and Mn(OAc)3·2H2O were reacted in methanol-H2O mixed solvents.A dark-brown solution was formed and filtrated.The filtrate was left for slow evaporation.Block shaped crystals were obtained after 1 week.Results The structure was determined by X-ray single diffraction,being a hexagonal system with space group R-3 and a=1.790 7(1)nm,b=1.790 7(1)nm,c=2.816 2(3)nm,α=90°,β=90°,γ=120°,V=7.820 1(11)nm3,Z=18,Mr=381.28,Dc=1.457 g/cm3.The final R and wR2 are 0.055 8 and 0.167 7.Conclusion The MnIV atom is chelated by two ligand molecules,which use their one nitrogen atom and two oxygen atoms to form an octahedral geometry.Intermolecular C-H…O hydrogen bonds and C-H…π interactions help to stabilize the molecular conformation.更多还原