有机化学 ›› 2000, Vol. 20 ›› Issue (2): 206-212. 上一篇    下一篇

研究论文

β- 丁氧酯基三氯化锡与席夫碱配合物的合成、结构与酯交换反应

李忠芳;王素文;谭小耀;傅芳信;潘华德   

  1. 山东工程学院科技研究院;东北师范大学化学系.长春(130024)
  • 发布日期:2000-04-25

Synthesis, crystal structure, transesterifications of the complex of β- butoxycarbonylethyltin trichlorides with schiff base ligands

Li Zhongfang;Wang Suwen;Tan Xiaoyao;Fu Fangxin;Pan Huade   

  1. NE Normal Univ, Dept Chem.Changchun(130024)
  • Published:2000-04-25

合成了标题化合物n-BuO2CCH2CH2SnCl3.(2-HOC6H4CH=NC6H4-OMe-4'),通过元素分析,UV-Vis,IR和^1HNMR进行了表征。其晶体结构分析表明,该晶体属单斜晶系,空间群P21/c;a=1.4661(3),b=0.9307(2),c=1.7888(4)nm,β=94.04(3)°,Mr=579.45,Z=4;V=2.4348(8)nm^3,DC=1.581mg/m^3,μ=1.405mm^-^1,F(000)=1160,R=0.0354,Rw=0.0486。该化合物为含有分子内羰基氧配位,Schiff碱以酚羟基上的氧原子配位,中心锡原子为六配位,空间构型为畸变八面体构型的单分子有机锡化合物。研究了标题化合物在醇中的酯交换反应,合成了8个配合物(CH3CH2)2CHCH2-),并对它们进行了表征,提出了酯交换反应的机理

关键词: 锡络合物, 席夫碱, 酯交换, 晶体结构

Title complex n-BuO2CCH2CH2SnCl2SnCl3. (2 -HOC6H4CH=NC6H4OMe-4') was synthesized and characterized by elemental analysis, UV - Vis, IR, ^1H NMR. The crystal structure was determined by the X - ray diffraction analysis. The crystal belong to monoclinic system, system, space group P2 1/c with a =1.4661(3), b =).9307(2), c =1.7888(4)nm, β=94. 04(3)°; Z=4. The complex exists as a discrete molecule, and the in atom attains a distorted octahedral geometry vis the coordination of intramolecular carbonyl oxygen and [henolic oxygen of the Schiff base. The coordination number of tin atom is 6. The transesterification ot title complex with ROH was studied and 8 new complexes RO2CCH2CH2SnCl3. (2-HOC6H4CH = NC6H4OM2 -4') (R=Me, Et, Pr, i - Bu, n - Am, i-Am, Cl - C2H4, (CH3CH2)2CHCH2 -) were obtained. The possibel mechanism is suggested

Key words: TIN COMPLEX, SCHIFF BASE, TRANSESTERIFICATION, CRYSTAL STRUCTURE

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