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Zhong W, Liu X, Zhu H, Zhao J, Yan H. Reactivity Modes of Cp*M-Type Half-Sandwich Dichalcogenolate Complexes with 2,6-Disubstituted Aryl Azides: The Effects of the Metal Center, Chalcogen, and Ligand Moiety on Product Formation. ACS OMEGA 2019; 4:12719-12726. [PMID: 31460394 PMCID: PMC6682133 DOI: 10.1021/acsomega.9b01364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Cp*M-type half-sandwich dichalcogenolate complexes bearing either carborane or benzene moieties show diverse reactivity patterns toward two selected 2,6-disubstituted aryl azides under thermal or photolytic conditions. The chalcogen (S and Se) has little effect on the formation of final products. However, the effects of both the metal center and the ligand moiety of the metal precursor on the reactions were significant. Compared to iridium precursor Cp*IrS2C2B10H10 (1a), rhodium and cobalt analogues (1b: Cp*RhS2C2B10H10, 1c: Cp*CoS2C2B10H10) demonstrated no reactivity toward aryl azides. The reaction of Cp*IrSe2C2B10H10 (1d) with 2,6-Me2C6H3N3 led to the clean formation of complex 2 with C(sp3)-H activation of one methyl group of the Cp* ligand and loss of N2 along with the rearrangement of the benzene ring of the original azide ligand, whereas the treatment of Cp*IrS2C6H4 (1e) with 2,6-Me2C6H3N3 under the same reaction conditions gave a 16-electron half-sandwich complex 5 featuring C-N coupling on one methyl group from the Cp* ligand. When 2-Me-6-NO2C6H3N3 was employed, the same reaction patterns for forming products (3 and 6) with the nitro group migrating to the para-position versus the original aryl azide were observed. In addition, the reaction with metal precursor 1d generated another product 4 featuring the exchange of nitro and azido groups, while the reaction with 1e afforded another complex 7 with the formation of the N-NO2 moiety. All new complexes were characterized by spectroscopy methods, and single-crystal X-ray analyses were performed for complexes 2 and 5-7. Furthermore, radical mechanisms for the formation of complexes 2-7 were proposed.
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Affiliation(s)
- Wei Zhong
- State
Key Laboratory of Coordination Chemistry, School of Chemistry
and Chemical Engineering, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
- College
of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China
| | - Xiaoming Liu
- College
of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China
| | - Hailiang Zhu
- State
Key Laboratory of Coordination Chemistry, School of Chemistry
and Chemical Engineering, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jing Zhao
- State
Key Laboratory of Coordination Chemistry, School of Chemistry
and Chemical Engineering, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Hong Yan
- State
Key Laboratory of Coordination Chemistry, School of Chemistry
and Chemical Engineering, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
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Zhong W, Xie M, Li Y, Yan H. Investigation into the reactivity of 16-electron complexes Cp#Co(S2C2B10H10) (Cp# = Cp, Cp*) towards methyl diazoacetate and toluenesulphonyl azide. RSC Adv 2014. [DOI: 10.1039/c4ra13017k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A three-component reaction of the 16-electron half-sandwich complex Cp*Co(S2C2B10H10) (2) with both methyl diazoacetate (MDA) and toluenesulphonyl azide (TsN3) led to the formation of complexes 3 and 4, while a two-component reaction of complex 2 with MDA afforded products 5–7.
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Affiliation(s)
- Wei Zhong
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, China
- College of Biological, Chemical Sciences and Engineering
| | - Mingshi Xie
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, China
| | - Yizhi Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, China
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, China
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