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Morales-Cerrada R, Ladmiral V, Gayet F, Fliedel C, Poli R, Améduri B. Fluoroalkyl Pentacarbonylmanganese(I) Complexes as Initiators for the Radical (co)Polymerization of Fluoromonomers. Polymers (Basel) 2020; 12:E384. [PMID: 32046342 PMCID: PMC7077403 DOI: 10.3390/polym12020384] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/16/2020] [Accepted: 02/04/2020] [Indexed: 11/25/2022] Open
Abstract
The use of [Mn(RF)(CO)5] (RF = CF3, CHF2, CH2CF3, COCF2CH3) to initiate the radical polymerization of vinylidene fluoride (F2C=CH2, VDF) and the radical alternating copolymerization of vinyl acetate (CH2=CHOOCCH3, VAc) with tert-butyl 2-(trifluoromethyl)acrylate (MAF-TBE) by generating primary RF• radicals is presented. Three different initiating methods with [Mn(CF3)(CO)5] (thermal at ca. 100 °C, visible light and UV irradiations) are described and compared. Fair (60%) to satisfactory (74%) polyvinylidene fluoride (PVDF) yields were obtained from the visible light and UV activations, respectively. Molar masses of PVDF reaching 53,000 g·mol-1 were produced from the visible light initiation after 4 h. However, the use of [Mn(CHF2)(CO)5] and [Mn(CH2CF3)(CO)5] as radical initiators produced PVDF in a very low yield (0 to 7%) by both thermal and photochemical initiations, while [Mn(COCF2CH3)(CO)5] led to the formation of PVDF in a moderate yield (7% to 23%). Nevertheless, complexes [Mn(CH2CF3)(CO)5] and [Mn(COCHF2)(CO)5] efficiently initiated the alternating VAc/MAF-TBE copolymerization. All synthesized polymers were characterized by 1H and 19F NMR spectroscopy, which proves the formation of the expected PVDF or poly(VAc-alt-MAF-TBE) and showing the chaining defects and the end-groups in the case of PVDF. The kinetics of VDF homopolymerization showed a linear ln[M]0/[M] versus time relationship, but a decrease of molar masses vs. VDF conversion was noted in all cases, which shows the absence of control. These PVDFs were rather thermally stable in air (up to 410 °C), especially for those having the highest molar masses. The melting points ranged from 164 to 175 °C while the degree of crystallinity varied from 44% to 53%.
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Affiliation(s)
- Roberto Morales-Cerrada
- Institut Charles Gerhardt Montpellier, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier CEDEX 5, France; (R.M.-C.); (V.L.)
- Laboratoire de Chimie de Coordination (LCC), Université de Toulouse, CNRS, UPS, INPT, 205 route de Narbonne, BP 44099, 31077 Toulouse CEDEX 4, France; (F.G.); (C.F.)
| | - Vincent Ladmiral
- Institut Charles Gerhardt Montpellier, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier CEDEX 5, France; (R.M.-C.); (V.L.)
| | - Florence Gayet
- Laboratoire de Chimie de Coordination (LCC), Université de Toulouse, CNRS, UPS, INPT, 205 route de Narbonne, BP 44099, 31077 Toulouse CEDEX 4, France; (F.G.); (C.F.)
| | - Christophe Fliedel
- Laboratoire de Chimie de Coordination (LCC), Université de Toulouse, CNRS, UPS, INPT, 205 route de Narbonne, BP 44099, 31077 Toulouse CEDEX 4, France; (F.G.); (C.F.)
| | - Rinaldo Poli
- Laboratoire de Chimie de Coordination (LCC), Université de Toulouse, CNRS, UPS, INPT, 205 route de Narbonne, BP 44099, 31077 Toulouse CEDEX 4, France; (F.G.); (C.F.)
| | - Bruno Améduri
- Institut Charles Gerhardt Montpellier, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier CEDEX 5, France; (R.M.-C.); (V.L.)
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Yang Y, Luo G, Li Y, Tong X, He M, Zeng H, Jiang Y, Liu Y, Zheng Y. Nickel-Catalyzed Reductive Coupling for Transforming Unactivated Aryl Electrophiles into β-Fluoroethylarenes. Chem Asian J 2020; 15:156-162. [PMID: 31755237 DOI: 10.1002/asia.201901490] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/21/2019] [Indexed: 01/24/2023]
Abstract
We report herein a facile synthetic method for converting unactivated (hetero)aryl electrophiles into β-fluoroethylated (hetero)arenes via nickel-catalyzed reductive cross-couplings. This coupling reaction features the involvement of FCH2 CH2 radical intermediate rather than β-fluoroethyl manganese species which provides effective solutions to the problematic β-fluoride side eliminations. The practical value of this protocol is further demonstrated by the late-stage modification of several complex ArCl or ArOH-derived bioactive molecules.
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Affiliation(s)
- Yi Yang
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Gen Luo
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Youlin Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Xia Tong
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Mengmeng He
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Hongyao Zeng
- College of Chemistry, Leshan Normal University, 778 Binghe Road, Leshan, Sichuan, 614000, China
| | - Yan Jiang
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Yingle Liu
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Yubin Zheng
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
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Morales‐Cerrada R, Fliedel C, Gayet F, Ladmiral V, Améduri B, Poli R. Homolytic Bond Strength and Radical Generation from (1‐Carbomethoxyethyl)pentacarbonylmanganese(I). Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Roberto Morales‐Cerrada
- CNRS, LCC (Laboratoire de Chimie de Coordination) Université de Toulouse, UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
- CNRS, ENSCM, Place Eugène Bataillon ICGM, Univ Montpellier 34095 Montpellier France
| | - Christophe Fliedel
- CNRS, LCC (Laboratoire de Chimie de Coordination) Université de Toulouse, UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Florence Gayet
- CNRS, LCC (Laboratoire de Chimie de Coordination) Université de Toulouse, UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Vincent Ladmiral
- CNRS, ENSCM, Place Eugène Bataillon ICGM, Univ Montpellier 34095 Montpellier France
| | - Bruno Améduri
- CNRS, ENSCM, Place Eugène Bataillon ICGM, Univ Montpellier 34095 Montpellier France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination) Université de Toulouse, UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
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Daran JC, Morales-Cerrada R, Fliedel C, Gayet F, Ladmiral V, Ameduri B, Poli R. Crystal structure of penta-carbon-yl(2,2-di-fluoro-propane-thio-ato-κ S)manganese(I). Acta Crystallogr E Crystallogr Commun 2019; 75:529-532. [PMID: 31110778 PMCID: PMC6505588 DOI: 10.1107/s2056989019004134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 03/27/2019] [Indexed: 12/01/2022]
Abstract
The title compound, [Mn{SC(O)CF2CH3}(CO)5], has been isolated as a by-product during the reaction of K[Mn(CO)5] with CH3CF2COCl. It is built up from a di-fluoro-methyl-propane-thio-ate bonded to an Mn(CO)5 moiety through the S atom. The Mn atom has an almost perfect octa-hedral coordination sphere. It is one of the rare examples of compounds containing the (CO)5MnS-C fragment. In the crystal, the methyl group occupies a pocket surrounded by the O atoms of three carbonyl groups of the Mn(CO)5 moiety; however, the H⋯O distances are rather long. These inter-actions lead to the formation of layers lying parallel to (101), which enclose R 4 4(15) and R 4 4(16) ring motifs. The CF2 group is disordered over two sets of sites with occupancies of 0.849 (3) and 0.151 (3).
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Affiliation(s)
| | - Roberto Morales-Cerrada
- LCC-CNRS, Université de Toulouse, CNRS, INPT, Toulouse, France
- ICGM CNRS, Univ Montpellier, ENSCM, Montpellier, France
| | | | - Florence Gayet
- LCC-CNRS, Université de Toulouse, CNRS, INPT, Toulouse, France
| | | | - Bruno Ameduri
- ICGM CNRS, Univ Montpellier, ENSCM, Montpellier, France
| | - Rinaldo Poli
- LCC-CNRS, Université de Toulouse, CNRS, INPT, Toulouse, France
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