期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 11, 期 22, 页码 7347-7358出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cy01357b
关键词
-
资金
- National Natural Science Foundation of China [21978198]
This study synthesized a series of Ru-amide/AC catalysts and found that replacing a hydrogen on formamide with an electron donor substituent can enhance catalytic performance, while electron withdrawing substituents have the opposite effect. A rule was discovered that the electron donor ability and steric hindrance of substituents on amide ligands jointly affect the modification effect, with formanilide violating this rule but showing the best modification effect.
To explore the role of substituents on ligands in the modification of metal catalysts, a series of Ru-amide/AC catalysts are synthesized with various amide ligands derived from formamide and assessed for acetylene hydrochlorination. Activity evaluation reveals a rule that replacing a hydrogen on formamide with an electron donor substituent can enhance the catalytic performance, while electron withdrawing substituents have the opposite effect. However, formanilide, which violates this law, shows the best modification effect, which is proved to be the effect of steric hindrance by characterization and DFT calculation. Therefore, another rule is concluded that the electron donor ability and steric hindrance of substituents on amide ligands jointly affect the modification effect. Finally, benzanilide, with a superior modification effect, which searched based on the above results, gives strong evidence for the correction of these rules. This work provides a theoretical basis for the search for efficient ligands for acetylene hydrochlorination.
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