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Nguyen VT, Lai Q, Witayapaisitsan N, Bhuvanesh N, Surawatanawong P, Ozerov OV. Migration of Hydride, Methyl, and Chloride Ligands between Al and M in (PAlP)M Pincer Complexes (M = Rh or Ir). Organometallics 2023; 42:3120-3129. [PMID: 38357656 PMCID: PMC10863399 DOI: 10.1021/acs.organomet.3c00359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Indexed: 02/16/2024]
Abstract
Protolysis of AlMe3 or AlBui3 with 2-diisopropylphosphinopyrrole (1) yields molecules containing two flanking phosphines and a central Al-Me (2-Me), Al-iBu (2-iBu), or Al-H (2-H) unit. The reactions of 2-Me with [L2MCl]2 (L = cyclooctene or 1/2 1,5-cyclooctadiene and M = Rh or Ir) in the presence of pyridine produces PAlClP pincer complexes (3-Rh and 3-Ir) with Al-Cl and M-Me bonds. The analogous reaction of a mixture of 2-iBu and 2-H with [L2MCl]2 and pyridine resulted in the formation of analogous Rh-H (4-Rh) and Ir-H (4-Ir) complexes. Treatment of 3-Rh with NaBEt3H produced compound 5-Rh with an Al-Me and a Rh-H bond; the analogous reaction of 3-Ir did not result in a clean product. 4-Ir accepted an equivalent of H2 to produce 6-Ir with two terminal Ir-H bonds and one bridging Al-H-Ir moiety, whereas 4-Rh did not react with H2. The density functional theoretical treatment is in accord with this finding, highlights the likely mechanism for the H2 addition, and supports the bonding picture in 6-Ir arising from NMR and X-ray diffraction (XRD) observations. Spectroscopic data and XRD studies are consistent with distorted square-pyramidal structures (about Rh or Ir) for compounds 3-5, with an alane occupying the apical position. Complexes 3 and 4 possess some of the shortest known Rh-Al or Ir-Al distances.
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Affiliation(s)
- Vinh T. Nguyen
- Department of Chemistry, Texas A&M
University, 3255 TAMU, College Station, Texas 77842, United States
| | - Qingheng Lai
- Department of Chemistry, Texas A&M
University, 3255 TAMU, College Station, Texas 77842, United States
| | - Naphol Witayapaisitsan
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M
University, 3255 TAMU, College Station, Texas 77842, United States
| | - Panida Surawatanawong
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Oleg V. Ozerov
- Department of Chemistry, Texas A&M
University, 3255 TAMU, College Station, Texas 77842, United States
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Sotorrios L, Miloserdov FM, Pécharman AF, Lowe JP, Macgregor SA, Mahon MF, Whittlesey MK. Zinc-Promoted ZnMe/ZnPh Exchange in Eight-Coordinate [Ru(PPh 3 ) 2 (ZnMe) 4 H 2 ]. Angew Chem Int Ed Engl 2022; 61:e202117495. [PMID: 35213937 PMCID: PMC9311408 DOI: 10.1002/anie.202117495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Indexed: 01/05/2023]
Abstract
The syntheses, reactivity and electronic structure analyses of [Ru(PPh3)2(ZnMe)4H2], 1 a, and [Ru(PPh3)2(ZnPh)4H2], 2 b, are reported. 1 a exhibits an 8‐coordinate Ru centre with axial phosphines and a symmetrical (2 : 2) arrangement of ZnMe ligands in the equatorial plane. The ZnMe ligands in 1 a undergo facile, sequential exchange with ZnPh2 to give 2 b, which shows a 3 : 1 arrangement of ZnPh ligands. Both 1 a and 2 b exist in equilibrium with their respective 3 : 1 and 2 : 2 isomers. Mechanisms for ZnMe/ZnPh exchange and isomerisation are proposed using DFT calculations. The relationships of these {Ru(ZnR)4H2} species to isoelectronic Group 8 transition metal polyhydrides and related Schlenk equilibria in the Negishi reaction are discussed.
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Affiliation(s)
- Lia Sotorrios
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Fedor M Miloserdov
- Department of Chemistry, University of Bath, Bath, BA2 3QD, UK.,Present address: Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
| | | | - John P Lowe
- Department of Chemistry, University of Bath, Bath, BA2 3QD, UK
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath, BA2 3QD, UK
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3
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Sotorrios L, Miloserdov FM, Pécharman AF, Lowe JP, Macgregor SA, Mahon MF, Whittlesey M. Zinc‐Promoted ZnMe/ZnPh Exchange in Eight‐Coordinate [Ru(PPh3)2(ZnMe)4H2]. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117495] [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]
Affiliation(s)
- Lia Sotorrios
- Heriot-Watt University School of Engineering and Physical Sciences UNITED KINGDOM
| | | | | | | | - Stuart A. Macgregor
- Heriot-Watt University School of Engineering and Physical Sciences UNITED KINGDOM
| | | | - Michael Whittlesey
- University of Bath Chemistry Department 1 SouthClaverton Down BA27AY Bath UNITED KINGDOM
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4
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Zhang X, Liu LL. A Free Aluminylene with Diverse σ‐Donating and Doubly σ/π‐Accepting Ligand Features for Transition Metals**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
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Zhang X, Liu LL. A Free Aluminylene with Diverse σ-Donating and Doubly σ/π-Accepting Ligand Features for Transition Metals*. Angew Chem Int Ed Engl 2021; 60:27062-27069. [PMID: 34614275 DOI: 10.1002/anie.202111975] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/26/2021] [Indexed: 12/15/2022]
Abstract
We report herein the synthesis, characterization, and coordination chemistry of a free N-aluminylene, namely a carbazolylaluminylene 2 b. This species is prepared via a reduction reaction of the corresponding carbazolyl aluminium diiodide. The coordination behavior of 2 b towards transition metal centers (W, Cr) is shown to afford a series of novel aluminylene complexes 3-6 with diverse coordination modes. We demonstrate that the tri-active ambiphilic Al center in 2 b can behave as: 1. a σ-donating and doubly π-accepting ligand; 2. a σ-donating, σ-accepting and π-accepting ligand; and 3. a σ-donating and doubly σ-accepting ligand. Additionally, we show ligand exchange at the aluminylene center providing access to the modulation of electronic properties of transition metals without changing the coordinated atoms. Investigations of 2 b with IDippCuCl (IDipp=1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) show an unprecedented aluminylene-alumanyl transformation leading to a rare terminal Cu-alumanyl complex 8. The electronic structures of such complexes and the mechanism of the aluminylene-alumanyl transformation are investigated through density functional theory (DFT) calculations.
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Affiliation(s)
- Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
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Graziano BJ, Vollmer MV, Lu CC. Cooperative Bond Activation and Facile Intramolecular Aryl Transfer of Nickel–Aluminum Pincer‐type Complexes. Angew Chem Int Ed Engl 2021; 60:15087-15094. [DOI: 10.1002/anie.202104050] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Indexed: 12/22/2022]
Affiliation(s)
- Brendan J. Graziano
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
| | - Matthew V. Vollmer
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
| | - Connie C. Lu
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
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Graziano BJ, Vollmer MV, Lu CC. Cooperative Bond Activation and Facile Intramolecular Aryl Transfer of Nickel–Aluminum Pincer‐type Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Brendan J. Graziano
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
| | - Matthew V. Vollmer
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
| | - Connie C. Lu
- Department of Chemistry University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA
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Affiliation(s)
- Matthias Vogt
- Institute of Chemistry Faculty of Natural Science II Martin Luther University Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle (Saale) Germany
| | - Robert Langer
- Institute of Chemistry Faculty of Natural Science II Martin Luther University Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle (Saale) Germany
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Zhang X, Wu SB, Leng X, Chung LW, Liu G, Huang Z. N-Bridged Pincer Iridium Complexes for Highly Efficient Alkane Dehydrogenation and the Relevant Linker Effects. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00539] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xin Zhang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Song-Bai Wu
- Department of Chemistry, Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xuebing Leng
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Lung Wa Chung
- Department of Chemistry, Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Guixia Liu
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Chang-Kung Chuang Institute, East China Normal University, Shanghai 200062, China
| | - Zheng Huang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Chang-Kung Chuang Institute, East China Normal University, Shanghai 200062, China
- School of Chemistry and Material Sciences, Hangzhou Institute of Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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Sugita K, Yamashita M. An Alumanylyttrium Complex with an Absorption due to a Transition from the Al-Y Bond to an Unoccupied d-Orbital. Chemistry 2020; 26:4520-4523. [PMID: 32052882 DOI: 10.1002/chem.202000752] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Indexed: 11/08/2022]
Abstract
The reaction between a dialkyl-substituted alumanyl anion and [Y(CH2 SiMe3 )2 (thf)3 ][BPh4 ] resulted in the formation of (dialkylalumanyl)yttrium complex 2, which exhibits the first 2-center-2-electron (2 c-2 e) Al-Y bond. The 1 H and 13 C NMR spectra of 2 together with an X-ray crystallographic analysis indicated a C2v symmetrical structure. DFT calculations on 2 revealed that its LUMO consists of overlapping 3 p- and 4 d-orbitals of the Al and Y atoms, respectively, and that the HOMO-LUMO gap is narrow. The UV/Vis spectrum of 2 exhibited a visible absorption at 432 nm, which suggests that the strong σ-donating and π-accepting character of the three-coordinate dialkylalumanyl ligand generates a colored d0 -complex that does not contain any π-electrons.
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Affiliation(s)
- Kengo Sugita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603, Japan
| | - Makoto Yamashita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603, Japan
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