On-surface stereoconvergent synthesis, dimerization and hybridization of organocopper complexes
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Despite the vital role of stereoconvergent synthesis in modern chemistry, the on-surface stereoconvergent synthesis of organometallic complexes involving transformation among several stereoisomers to one specific form has been few reported. By combination of high-resolution scanning tunneling microscopy (STM) imaging/manipulation and density functional theory (DFT) calculations, we have displayed the stereoconvergent synthesis of organocopper complexes via the Cu-alkene interaction and further dimerization into H-shaped motifs, in which two cis-forms and one trans-form are involved, and the specific adsorption configuration of one cis-form is revealed to be the key for such a synthesis. Furthermore, the generality of the dimerization of organocopper complexes has also been verified by codeposition of two similar molecular precursors, and the hybridized K-shaped motifs (made up of two kinds of organocopper complexes) have been successfully achieved. These findings may provide atomic-scale insights into the synthesis of specific stereoisomers in the fields of pharmaceuticals, biochemistry and organometallic chemistry.
Keywordsscanning tunneling microscopy density functional theory surface chemistry organometallic complex stereoconvergent synthesis
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This work was supported by the National Natural Science Foundation of China (21473123, 21622307, 21790351), and the Fundamental Research Funds for the Central Universities. Prof. Aiguo Hu and Dr. Zhiwen Li are acknowledged for providing the molecules.