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Tannoux T, Mazaud L, Cheisson T, Casaretto N, Auffrant A. Fe II complexes supported by an iminophosphorane ligand: synthesis and reactivity. Dalton Trans 2023; 52:12010-12019. [PMID: 37581245 DOI: 10.1039/d3dt00950e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The synthesis of iron complexes supported by a mixed phosphine-lutidine-iminophosphorane (PPyNP) ligand was carried out. While bidentate κ2-N,N coordination was observed for FeCl2, pincer coordination modes were adopted at cationic iron centers, either through dechlorination of [LFe(PPyNP)Cl2] (1) or direct coordination of PPyNP to Fe(OTf)2. Reaction with tert-butylisocyanide gave access to the diamagnetic octahedral complex [Fe(PPyNP)(CNtBu)3]X2 (X = OTf (4), Cl (4')). Both 1 and 4 were shown to undergo deprotonation of the phosphinomethyl group, but the resulting complexes were not active for the dehydrogenative coupling of hexan-1-ol. The hydrosilylation of acetophenones was catalyzed at room temperature with 1 mol% of a catalyst generated in situ from cationic PPyNP-supported iron triflate complexes and KHBEt3.
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Affiliation(s)
- Thibault Tannoux
- Laboratoire de Chimie Moléculaire (LCM) CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91120 Palaiseau Cedex, France.
| | - Louis Mazaud
- Laboratoire de Chimie Moléculaire (LCM) CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91120 Palaiseau Cedex, France.
| | - Thibault Cheisson
- Laboratoire de Chimie Moléculaire (LCM) CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91120 Palaiseau Cedex, France.
| | - Nicolas Casaretto
- Laboratoire de Chimie Moléculaire (LCM) CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91120 Palaiseau Cedex, France.
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire (LCM) CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91120 Palaiseau Cedex, France.
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Popovici I, Barthes C, Tannoux T, Duhayon C, Casaretto N, Monari A, Auffrant A, Canac Y. Phosphonium Ylides vs Iminophosphoranes: The Role of the Coordinating Ylidic Atom in cis-[Phosphine-Ylide Rh(CO) 2] Complexes. Inorg Chem 2023; 62:2376-2388. [PMID: 36704899 DOI: 10.1021/acs.inorgchem.2c04151] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The coordinating properties of two families of ylides, namely, phosphonium ylides and iminophosphoranes, differently substituted at the ylidic center (CH2- vs NiPr-), have been investigated in structurally related cationic phosphine-ylide Rh(CO)2 complexes obtained from readily available phosphine-phosphonium salt precursors derived from an ortho-phenylene bridge. However, while the Rh(CO)2 complex bearing the P+-CH2- donor moiety proved to be stable, the P═NiPr donor end appeared to induce lability to one of the CO groups. All of the RhI carbonyl complexes in both ylide series were fully characterized, including through X-ray diffraction analysis. Based on the experimental and calculated infrared (IR) CO stretching frequencies in Rh(CO)2 complexes, we evidenced that the phosphonium ylide ligand is a stronger donor than the iminophosphorane ligand. However, we also found that the difference in the intrinsic electronic properties can be largely compensated by the introduction of an iPr substituent on the N atom of the iminophosphorane, hence pointing to the noninnocent role of the peripheral substituent and opening novel possibilities to tune the properties of metal complexes containing ylide ligands.
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Affiliation(s)
- Ingrid Popovici
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France
| | - Cécile Barthes
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Thibault Tannoux
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France
| | - Carine Duhayon
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Nicolas Casaretto
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France
| | - Antonio Monari
- ITODYS, Université Paris Cité and CNRS, F-75006 Paris, France
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France
| | - Yves Canac
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
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3
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Tannoux T, Auffrant A. Complexes featuring tridentate iminophosphorane ligands: Synthesis, reactivity, and catalysis. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lukoyanov AN, Zvereva YV, Parshina DA, Cherkasov AV, Ketkov SY. Calcium Complexes Bearing Dianionic or Monoanionic Iminoacenaphthen‐1‐one Ligands: Synthesis, Reactions with Alkynes and Catalysis of L‐lactide Polymerization. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anton Nicolaevich Lukoyanov
- Institut metalloorganiceskoj himii imeni G A Razuvaeva Rossijskoj akademii nauk Russian Academy of Sceinces Tropinina, 49 603950 Nizhny Novgorod RUSSIAN FEDERATION
| | - Yulia V. Zvereva
- Institut metalloorganičeskoj himii imeni G A Razuvaeva Rossijskoj akademii nauk: FGBUN Institut metalloorganiceskoj himii im G A Razuvaeva Rossijskoj akademii nauk Russian Academy of Sceinces Тропинина 49 603950 Нижний Новгород RUSSIAN FEDERATION
| | - Diana A. Parshina
- Lobachevsky State University of Gorky: Nacional'nyj issledovatel'skij Nizegorodskij gosudarstvennyj universitet imeni N I Lobacevskogo Ministry of Educatuin and Higher Education of the Russian Federation Gagarina, 23 603022 Нижний Новгород RUSSIAN FEDERATION
| | - Anton V. Cherkasov
- Institut metalloorganičeskoj himii imeni G A Razuvaeva Rossijskoj akademii nauk: FGBUN Institut metalloorganiceskoj himii im G A Razuvaeva Rossijskoj akademii nauk Russian Academy of Sceinces Тропинина 49 603950 Нижний Новгород RUSSIAN FEDERATION
| | - Sergey Yu. Ketkov
- Institut metalloorganičeskoj himii imeni G A Razuvaeva Rossijskoj akademii nauk: FGBUN Institut metalloorganiceskoj himii im G A Razuvaeva Rossijskoj akademii nauk Russian Academy of Sceinces Тропинина 49 603950 Нижний Новгород RUSSIAN FEDERATION
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5
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Westerhausen M, Mandel MJ, Müller C, Görls H, Krieck S. Metalation of Aryl‐bis(3‐alkyl‐5‐methylpyrazol‐1‐yl)methane (Alkyl = Me, Ad; Aryl = Ph, C6H4‐2‐OH) with NaN(SiMe3)2, KN(SiMe3)2, and Ca{N(SiMe3)2}2. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Miles J. Mandel
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Inorganic and Analytical Chemistry GERMANY
| | - Christoph Müller
- Friedrich Schiller University Jena: Friedrich-Schiller-Universitat Jena Institute of Inorganic and Analytical Chemistry GERMANY
| | - Helmar Görls
- Friedrich Schiller University Jena: Friedrich-Schiller-Universitat Jena Institute of Inorganic and Analytical Chemistry GERMANY
| | - Sven Krieck
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Inorganic and Analytical Chemistry GERMANY
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Hu M, Song X, Wang F, Zhang W, Ma W, Han F. Ring-opening polymerization of rac-lactide catalyzed by magnesium and zinc complexes supported by an NNO ligand. NEW J CHEM 2022. [DOI: 10.1039/d1nj05157a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Preparation of magnesium and zinc complexes containing unsymmetric tertiary amine ligands and their catalytic properties for polymerization of rac-lactide.
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Affiliation(s)
- Minggang Hu
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar University, Qiqihar, 161006, China
| | - Xinfeng Song
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Fugui Wang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Wenzhi Zhang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Wenhui Ma
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Fuzhong Han
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
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D'Auria I, Lamberti M, Rescigno R, Venditto V, Mazzeo M. Copolymerization of L-Lactide and ε-Caprolactone promoted by zinc complexes with phosphorus based ligands. Heliyon 2021; 7:e07630. [PMID: 34381896 PMCID: PMC8339243 DOI: 10.1016/j.heliyon.2021.e07630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/02/2021] [Accepted: 07/20/2021] [Indexed: 11/04/2022] Open
Abstract
The zinc complexes 1 and 2 bearing chelating phosphorous based pincer ligands were found to catalyze the ring-opening copolymerization of L-lactide and ε-caprolactone in the melt at 110 °C to obtain a series of random copolymers in which the monomer distributions were coherent with the monomer ratio in the feed. All the obtained copolymers showed high molecular masses with monomodal and moderately narrow distributions. The thermal properties of the achieved copolymers (Tg, glass transition temperature, and Tm, melting temperature) were strongly dependent on their composition. A linear dependence of Tg with molar percentage of lactide in the copolymers was observed over a temperature range from -59 °C (pure polycaprolactone) to 55 °C (pure polylactide).
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Affiliation(s)
- Ilaria D'Auria
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Marina Lamberti
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Raffaella Rescigno
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy.,INSTM Research Unit, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
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Efficient Bulky Organo-Zinc Scorpionates for the Stereoselective Production of Poly( rac-lactide)s. Polymers (Basel) 2021; 13:polym13142356. [PMID: 34301114 PMCID: PMC8309543 DOI: 10.3390/polym13142356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 11/17/2022] Open
Abstract
The direct reaction of the highly sterically demanding acetamidinate-based NNN'-scorpionate protioligand Hphbptamd [Hphbptamd = N,N'-di-p-tolylbis(3,5-di-tertbutylpyrazole-1-yl)acetamidine] with one equiv. of ZnMe2 proceeds in high yield to the mononuclear alkyl zinc complex [ZnMe(κ3-phbptamd)] (1). Alternatively, the treatment of the corresponding lithium precursor [Li(phbptamd)(THF)] with ZnCl2 yielded the halide complex [ZnCl(κ3-phbptamd)] (2). The X-ray crystal structure of 1 confirmed unambiguously a mononuclear entity in these complexes, with the zinc centre arranged with a pseudotetrahedral environment and the scorpionate ligand in a κ3-coordination mode. Interestingly, the inexpensive, low-toxic and easily prepared complexes 1 and 2 resulted in highly efficient catalysts for the ring-opening polymerisation of lactides, a sustainable bio-resourced process industrially demanded. Thus, complex 1 behaved as a single-component robust initiator for the living and immortal ROP of rac-lactide under very mild conditions after a few hours, reaching a TOF value up to 5520 h-1 under bulk conditions. Preliminary kinetic studies revealed apparent zero-order dependence on monomer concentration in the absence of a cocatalyst. The PLA materials produced exhibited narrow dispersity values, good agreement between the experimental Mn values and monomer/benzyl alcohol ratios, as well as enhanced levels of heteroselectivity, reaching Ps values up to 0.74.
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