1093808-82-2Relevant academic research and scientific papers
Unsymmetrical bidentate ligands of α-aminoaldimines leading to sterically controlled selectivity of geometrical isomerism in square planar coordination
Lee, Jen-Jeh,Yang, Feng-Zhao,Lin, Ya-Fan,Chang, Ya-Chun,Yu, Kuo-Hsuan,Chang, Mu-Chieh,Lee, Gene-Hsiang,Liu, Yi-Hung,Wang, Yu,Liu, Shiuh-Tzung,Chen, Jwu-Ting
, p. 5945 - 5956 (2009/02/07)
New α-aminoaldimines with the formula of Et2NCMe 2CHNR (R = iPr, tBu, Ph) and their dichloro or diacetato complexes of Ni, Pd, Pt are prepared and structurally characterized. A nickel complex is in a distorted tetrahedral configuration, and the Pd and Pt complexes (4-6) are of square planar form. The α-aminoaldimines can chelate to the metal in a C2-unsymmetric bidentate motif through the hetero functionalities of amine and imine, which show comparable trans influence. Square planar organometallic palladium derivatives bearing α-aminoaldimines, including Pd-methyl, Pd-acetyl, and Pd- (η2-acetylnorboryl) (7-10), are also synthesized. The latter two species are a result of CO-insertion into Pd-methyl complexes and ensuing norbornene-insertion, respectively. The geometrical isomerism is found in the trans configuration in most studied cases. Such a stereoselectivity results from the thermodynamic stability governed predominantly by steric control. The stereoselectivity is also supported by DFT calculations.
