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Cheng Y, Wang Y, Li S, Shen M, Huang H, Liao M, Peng J, Ding S, Chen X, Xu W, Yang S. Mechanism on redistribution synthesis of dichlorodimethylsilane by AlCl 3/ZSM-5(3T)@γ-Al 2O 3 core-shell catalyst. J Mol Model 2021; 27:255. [PMID: 34410509 DOI: 10.1007/s00894-021-04859-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/28/2021] [Indexed: 11/27/2022]
Abstract
The redistribution method plays an important role in addressing the issue of organosilicon by-products in the direct synthesis of dichlorodimethylsilane, and the redistribution mechanism is still a topic of debate. The redistribution mechanism by the ZSM-5(3 T)@γ-Al2O3 core-shell catalyst and post-modified AlCl3/ZSM-5(3 T)@γ-Al2O3 catalyst was technically performed using the Density functional theory (DFT) at the level of B3LYP/6-311 + + G(3df,2pd). The results show that no. 1 active site of ZSM-5(3 T)@γ-Al2O3 core-shell structure has a significant effect on the activity of the catalyst. Indicating that the active center involved in the reaction is H provided by the Al-O-H bond, which is an obvious catalytic active center of Bronsted acid. Furthermore, the post-modified AlCl3/ZSM-5(3T)@γ-Al2O3 catalyst is in more favor of redistribution reaction comparing with the ZSM-5(3 T)@γ-Al2O3 core-shell catalyst. It ascribes to the robust Lewis site of aluminum chloride favorable modification. The redistribution synthesis mechanism of dichlorodimethylsilane on the ZSM-5(3 T)@γ-Al2O3 core-shell catalyst and post-modified AlCl3/ZSM-5(3 T)@γ-Al2O3 catalyst had been investigated by using the Density functional theory (DFT) method at the level of B3LYP/6-311 + + G(3df,2pd). The former active center was Bronsted acidic center, while the latter one was Lewis acidic center, ascribing to the Lewis site of aluminum chloride favorable modification. The catalytic activity of the post-synthesis AlCl3/ZSM-5(3 T)@γ-Al2O3 catalyst completely was consistent with experimental results.
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Affiliation(s)
- Yongbing Cheng
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Yan Wang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Suying Li
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Mengsha Shen
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Hongkun Huang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Mengyin Liao
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Jiaxi Peng
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Shunmin Ding
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, 330031, People's Republic of China
| | - Xi Chen
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China
| | - Wenyuan Xu
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China.
| | - Shaoming Yang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, People's Republic of China.
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Šimarek A, Lamač M, Horáček M, Pinkas J. B(C 6
F 5
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catalysis accelerates the hydrosilane chlorination by Ph 3
CCl. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Adam Šimarek
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
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