Isomerism of Strain-Free Metallamacrocycle. Dichloropalladium(II) Complex of 1,2-Bis(dimethyl-3-pyridylsilyl)ethane

Bulletin of the Korean chemical society

Jongki Hong¹  Ok Sang Jung¹  Hyun Ji Kang¹  Young Mee Na¹ 

关键词: Palladium(II) complexes;    Cyclodimer;    Cyclotrimer;    Interconversion;    Isomerism;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Modulation of the ring size of strain-free metallacyclic compounds via thermal energy has been established. The reactions of (COD)PdCl2 with m-dpe ligand (COD = 1,5-cyclooctadiene; m-dpe = 1,2-bis(dimethyl-3- pyridylsilyl)ethane) in a mixture of acetone and ethanol at room temperature produce the metallacyclodimeric species, [PdCl2(m-dpe)]2. The cyclodimer, [PdCl2(m-dpe)]2, at the boiling temperature of the chloroform solution is completely converted to the cyclotrimer, [PdCl2(m-dpe)]3. In the 0-55 oC range, the cyclotrimer completely returns to the cyclodimer in solution for 24 h. Both the cyclodimer and the cyclotrimer are locked in the solution below 0 oC. The equilibria in the 0-55 oC range are dependent on temperature and concentration.

【 授权许可】

Unknown