基于邻苯二甲酰-L-丙氨酸配体的两例Cu(II)纯手性同质多晶配合物:合成与结构
Two Concomitant Polymorphs of Homochiral Cu(Ⅱ) Coordination Compounds Based on N-phthalyl-L-alanine: Syntheses and Crystal Structures
作者单位E-mail
李孟丽 河北师范大学化学与材料科学学院, 石家庄 050024
深州市中学, 深州 053800 
 
常旭 河北师范大学化学与材料科学学院, 石家庄 050024  
曾艳丽 河北师范大学化学与材料科学学院, 石家庄 050024  
宋会花 河北师范大学化学与材料科学学院, 石家庄 050024 songhuihua@mail.hebtu.edu.cn 
摘要: 合成了2例Cu(Ⅱ)的纯手性同质多晶[CuL2(Phen)](HL=邻苯二甲酰-L-丙氨酸,Phen=1,10-菲咯啉),并对其进行了表征。X射线单晶衍射测定表明,邻苯二甲酰-L-丙氨酸在2例配合物中采取了相同的配位方式,Cu(Ⅱ)原子具有变形的八面体配位环境,分别和2个邻苯二甲酰-L-丙氨酸离子上的2个羧基氧原子,1个1,10-菲咯啉的2个氮原子配位。不同的是这2例同质多晶显示出不同的颜色,并且配合物1属于单斜晶系,C2空间群,配合物2属于正交晶系,P212121空间群。配合物1通过π…π堆积作用形成一维链状结构,配合物2是简单小分子结构。此外,DFT理论研究表明,配合物1具有较低的能量,稳定性更高。
关键词: 手性铜(II)配合物  晶体结构  同质多晶  异构体
基金项目: 河北省自然科学基金(No.B2012205040)和河北师范大学基金(No.L2016K03)资助项目。
Abstract: Two isomers of novel homochiral coordination compound[CuL2(Phen)] (HL=N-phthalyl-L-alanine, Phen=1,10-phenathroline) have been synthesized simultaneously and structurally characterized by elemental analyses, IR and single crystal X-ray diffraction. The two polymorphs 1 and 2 exhibit different colors. HL in these two complexes adopts same conformations, the molecular structures vary only slightly between the two forms. Cu(Ⅱ) ions are all distorted octahedral geometry and coordinated by two pairs of oxygen atoms from two L and two nitrogen atoms from one Phen in complexes 1 and 2, with a monoclinic space group C2 and an orthorhombic space group P212121, respectively. Complex 1 is self-assembled to form 1D double chains through π…π stacking interactions of the aromatic rings of L ligands from two adjacent structures, with face-to-face distances of ca. 0.366 4 nm. There is no stacking in the structure of complex 2. Furthermore, the DFT theoretical calculation shows that complex 1 is lower in energy and more stable than 2.
Keywords: copper(II) complex  crystal structure  polymorphism  conformers  homochiral
投稿时间:2017-05-29 修订日期:2017-10-25
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李孟丽,常旭,曾艳丽,宋会花.基于邻苯二甲酰-L-丙氨酸配体的两例Cu(II)纯手性同质多晶配合物:合成与结构[J].无机化学学报,2018,34(1):83-91.
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