1
|
Saint-Denis TG, Wheeler TA, Chen Q, Balázs G, Settineri NS, Scheer M, Tilley TD. A Ruthenophosphanorcaradiene as a Synthon for an Ambiphilic Metallophosphinidene. J Am Chem Soc 2024; 146:4369-4374. [PMID: 38335065 PMCID: PMC10885142 DOI: 10.1021/jacs.3c14779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
Reaction of the ruthenium carbene complex Cp*(IPr)RuCl (1) (IPr = 1,3-bis(Dipp)imidazol-2-ylidene; Dipp = 2,6-diisopropylphenyl) with sodium phosphaethynolate (NaOCP) led to intramolecular dearomatization of one of the Dipp substituents on the Ru-bound carbene to afford a Ru-bound phosphanorcaradiene, 2. Computations by DFT reveal a transition state characterized by a concerted process whereby CO migrates to the Ru center as the P atom adds to the π system of the aryl group. The phosphanorcaradiene possesses ambiphilic properties and reacts with both nucleophilic and electrophilic substrates, resulting in rearomatization of the ligand aryl group with net P atom transfer to give several unusual metal-bound, P-containing main-group moieties. These new complexes include a metallo-1-phospha-3-azaallene (Ru─P═C═NR), a metalloiminophosphanide (Ru─P═N─R), and a metallophosphaformazan (Ru─P(═N─N═CPh2)2). Reaction of 2 with the carbene 2,3,4,5-tetramethylimidazol-2-ylidene (IMe4) produced the corresponding phosphaalkene DippP═IMe4.
Collapse
Affiliation(s)
- Tyler G Saint-Denis
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - T Alexander Wheeler
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - Qingchuan Chen
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - Gábor Balázs
- Department of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Nicholas S Settineri
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - Manfred Scheer
- Department of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - T Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| |
Collapse
|
2
|
Sharma MK, Weinert HM, Wölper C, Schulz S. Gallaphosphene L(Cl)GaPGaL: A novel phosphinidene transfer reagent. Chemistry 2024:e202400110. [PMID: 38235843 DOI: 10.1002/chem.202400110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 01/19/2024]
Abstract
Gallaphosphene L(Cl)GaPGaL 1 (L=HC[C(Me)N(Ar)]2 ; Ar=2,6-iPr2 C6 H3 ) reacts with N-heterocyclic carbenes R NHC (R NHC=[CMeN(R)]2 C; R=Me, iPr) to R NHC-coordinated phosphinidenes R NHC→PGa(Cl)L (R=Me 2 a, iPr 2 b) and with isonitriles RNC (R=iPr, Cy) to 1,3-phosphaazaallenes L(Cl)GaP=C=N-R (R=iPr 3 a, Cy 3 b), respectively. Quantum chemical calculations reveal that 2 a/2 b possess two localized lone pair of electrons, whereas 3 a/3 b only show one localized lone pair as was reported for gallaphosphene 1. 2 b reacts with 2.5 equivalents of a borane (THF ⋅ BH3 ) to the NHC-stabilized phosphinidene-borane complex [iPr NHC→P(BH2 )]2 (BH3 )3 4 with concomitant formation of LGa(H)Cl 5. 2-5 are characterized by heteronuclear (1 H, 13 C{1 H}, 31 P{1 H}) NMR and IR spectroscopy, elemental analysis, and single crystal X-ray diffraction (sc-XRD).
Collapse
Affiliation(s)
- Mahendra K Sharma
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, D-45141, Essen
| | - Hanns M Weinert
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, D-45141, Essen
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, D-45141, Essen
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, D-45141, Essen
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, D-47057, Duisburg
| |
Collapse
|
3
|
Nees S, Beer H, Just P, Teichmeier LM, Christoffer LE, Guljam A, Kushik, Braunschweig H, Hering-Junghans C. On the Reactivity of Mes*P(PMe 3 ) towards Aluminum(I) Compounds - Evidence for the Intermediate Formation of Phosphaalumenes. Chempluschem 2023; 88:e202300078. [PMID: 36824017 DOI: 10.1002/cplu.202300078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/22/2023] [Accepted: 02/23/2023] [Indexed: 02/25/2023]
Abstract
Phosphaalumenes are the heavier isoelectronic analogs of alkynes and have eluded facile synthesis until recently. We have reported that the combination of a phosphinidene transfer agent, Ar TerP(PMe3 ) (Ar Ter=2,6-Ar2 -C6 H3 ), with (Cp*Al)4 (Cp*=C5 (CH3 )5 ) afforded the phosphaalumenes Ar TerPAlCp* as isolable, violet, thermally stable compounds. In here we describe attempts to utilize Mes*P(PMe3 ) (Mes*=2,4,6-tBu3 -C6 H2 ) as a phosphinidene source in combination with different Al(I) precursors, namely Dip NacnacAl (Dip Nacnac=HC[C(Me)NDip]2 , Dip=2,6-iPr2 -C6 H3 ), (Cp*Al)4 and Cp3t Al (Cp3t =1,2,4-tBu3 -C5 H2 ). In all cases the formation of phosphaalumenes was not observed, however, their intermediate formation is indicated by formation of the dimer [Cp*Al(μ-PMes*)]2 (2) and C-H-bond activation products along the putative P=Al bond, giving unusual 1,2-P,Al-tetrahydronaphtalene derivatives 1 and 4, clearly underlining the role the sterically demanding group on phosphorus plays in these transformations. The reactivity studies are supported by theoretical studies, demonstrating a thermodynamic preference for the C-H activation products. Additionally, we show that there are potential pitfalls in the synthesis of Cp*2 AlH, the precursor to make (Cp*Al)4 and give recommendations how to circumvent these.
Collapse
Affiliation(s)
- Samuel Nees
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Henrik Beer
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Philip Just
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Leon M Teichmeier
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Leif E Christoffer
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Ailina Guljam
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Kushik
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | | |
Collapse
|
4
|
Royla P, Schwedtmann K, Han Z, Fidelius J, Gates DP, Gomila RM, Frontera A, Weigand JJ. Cationic Phosphinidene as a Versatile P 1 Building Block: [L C-P] + Transfer from Phosphonio-Phosphanides [L C-P-PR 3] + and Subsequent L C Replacement Reactions (L C = N-Heterocyclic Carbene). J Am Chem Soc 2023; 145:10364-10375. [PMID: 37105536 PMCID: PMC10177976 DOI: 10.1021/jacs.3c02256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Indexed: 04/29/2023]
Abstract
Cationic imidazoliumyl(phosphonio)-phosphanides [LC-P-PR3]+ (1a-e+, LC = 4,5-dimethyl-1,3-diisopropylimidazolium-2-yl; R = alkyl, aryl) are obtained via the nucleophilic fragmentation of tetracationic tetraphosphetane [(LC-P)4][OTf]4 (2[OTf]4) with tertiary phosphanes. They act as [LC-P]+ transfer reagents in phospha-Wittig-type reactions, when converted with various thiocarbonyls, giving unprecedented cationic phosphaalkenes [LC-P═CR2]+ (5a-f[OTf]) or phosphanides [LC-P-CR(NR2')]+ (6a-d[OTf]). Theoretical calculations suggest that three-membered cyclic thiophosphiranes are crucial intermediates of this reaction. To test this hypothesis, treatment of [LC-P-PPh3]+ with phosphaalkenes, that are isolobal to thioketones, permits the isolation of diphosphirane salts 11a,b[OTf]. Furthermore, preliminary studies suggest that the cationic phosphaalkene [LC-P═CPh2]+ may be employed to access rare examples of η2-P═C π-complexes with Pd0 and Pt0 when treated with [Pd(PPh3)4] and [Pt(PPh3)3] for which analogous complexes of neutral phosphaalkenes are scarce. The versatility of [LC-P]+ as a valuable P1 building block was showcased in substitution reactions of the transferred LC-substituent using nucleophiles. This is demonstrated through the reactions of 5a[OTf] and 6c[OTf] with Grignard reagents and KNPh2, providing a convenient, high-yielding access to MesP═CPh2 (16) and otherwise difficult-to-synthesize 1,3-diphosphetane 17 and P-aminophosphaalkenes.
Collapse
Affiliation(s)
- Philipp Royla
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Kai Schwedtmann
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Zeyu Han
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, V6T 1Z1 Vancouver, Canada
| | - Jannis Fidelius
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Derek P. Gates
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, V6T 1Z1 Vancouver, Canada
| | - Rosa M. Gomila
- Department
of Chemistry, Universitat de Illes Balears, 07122 Palma de
Mallorca, Spain
| | - Antonio Frontera
- Department
of Chemistry, Universitat de Illes Balears, 07122 Palma de
Mallorca, Spain
| | - Jan J. Weigand
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| |
Collapse
|
5
|
Walsh MP, Barclay JA, Begg CS, Xuan J, Kitching MO. Conglomerate Crystallization in the Cambridge Structural Database (2020-2021). CRYSTAL GROWTH & DESIGN 2023; 23:2837-2844. [PMID: 37038395 PMCID: PMC10080650 DOI: 10.1021/acs.cgd.3c00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/03/2023] [Indexed: 06/19/2023]
Abstract
Conglomerate crystals are materials capable of undergoing spontaneous resolution and were responsible for the discovery of molecular chirality. Their relevance to modern chemical and crystallographic sciences has been hindered by the difficulty in identifying and searching materials with this characteristic ability to spontaneously bias their own enantioenrichment. With the release of the November 2021 distribution of the Cambridge Structural Database (CSD) (version 5.43), a fresh quantity of chiral conglomerate crystals is expected to have been published in the CSD without identification. Indeed, no crystals in the CSD have been identified as a spontaneously resolving conglomerate crystal in their crystallographic information file since the 2019 release, despite the deposition of over 108,000 new crystal structures into the database over the same time period. A manual inspection of crystals deposited between 2020 and 2021 was conducted to identify 343 new chiral materials which exhibit conglomerate crystallization behavior. It is hoped that the continued manual curation of this list will aid those in the crystallographic and synthetic communities to study and exploit this spontaneous enantioenrichment behavior.
Collapse
Affiliation(s)
- Mark P. Walsh
- Process
Research and Development, Carbogen Amcis
Ltd., 303 Clayton Lane, Manchester, M11 4SX, U.K.
| | - James A. Barclay
- Department
of Chemistry, Durham University, Lower Mount Joy, South Rd., Durham, DH1 3LE, U.K.
| | - Callum S. Begg
- Department
of Chemistry, Durham University, Lower Mount Joy, South Rd., Durham, DH1 3LE, U.K.
| | - Jinyi Xuan
- Department
of Chemistry, Durham University, Lower Mount Joy, South Rd., Durham, DH1 3LE, U.K.
| | - Matthew O. Kitching
- Department
of Chemistry, Durham University, Lower Mount Joy, South Rd., Durham, DH1 3LE, U.K.
| |
Collapse
|
6
|
Nees S, Wellnitz T, Dankert F, Härterich M, Dotzauer S, Feldt M, Braunschweig H, Hering-Junghans C. On the Reactivity of Phosphaalumenes towards C-C Multiple Bonds. Angew Chem Int Ed Engl 2023; 62:e202215838. [PMID: 36516342 DOI: 10.1002/anie.202215838] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 12/15/2022]
Abstract
Heterocycles containing group 13 and 15 elements such as borazines are an integral part of organic, biomedical and materials chemistry. Surprisingly, heterocycles containing P and Al are rare. We have now utilized phosphaalumenes in reactions with alkynes, alkenes and conjugated double bond systems. With sterically demanding alkynes 1,2-phosphaalumetes were afforded, whereas the reaction with HCCH or HCCSiMe3 gave 1,4-phosphaaluminabarrelenes. Using styrene saturated 1,2-phosphaalumates were formed, which reacted further with additional styrene to give different regio-isomers of 1,4-aluminaphosphorinanes. Using ethylene, a 1,4-aluminaphosphorinane is obtained, while with 1,3-butadiene a bicyclic system containing an aluminacyclopentane and a phosphirane unit was synthesized. The experimental work is supported by theoretical studies to shed light on the mechanism governing the formation of these heterocycles.
Collapse
Affiliation(s)
- Samuel Nees
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Tim Wellnitz
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Fabian Dankert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Marcel Härterich
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Simon Dotzauer
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Milica Feldt
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | | |
Collapse
|
7
|
Dankert F, Siewert JE, Gupta P, Weigend F, Hering-Junghans C. Metal-Free N-H Bond Activation by Phospha-Wittig Reagents. Angew Chem Int Ed Engl 2022; 61:e202207064. [PMID: 35594171 PMCID: PMC9400956 DOI: 10.1002/anie.202207064] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Indexed: 01/07/2023]
Abstract
N‐containing molecules are mostly derived from ammonia (NH3). Ammonia activation has been demonstrated for single transition metal centers as well as for low‐valent main group species. Phosphinidenes, mono‐valent phosphorus species, can be stabilized by phosphines, giving so‐called phosphanylidenephosphoranes of the type RP(PR′3). We demonstrate the facile, metal‐free NH3 activation using ArP(PMe3), affording for the first time isolable secondary aminophosphines ArP(H)NH2. DFT studies reveal that two molecules of NH3 act in concert to facilitate an NH3 for PMe3 exchange. Furthermore, H2NR and HNR2 activation is demonstrated.
Collapse
Affiliation(s)
- Fabian Dankert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Jan-Erik Siewert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Priyanka Gupta
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Florian Weigend
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35032, Marburg, Germany
| | | |
Collapse
|
8
|
Timofeeva V, Baeza JML, Nougué R, Syroeshkin M, Segundo Rojas Guerrero R, Saffon-Merceron N, Altınbaş Özpınar G, Rathjen S, Müller T, Baceiredo A, Kato T. Reductive Elimination at Pb(II) Center of an (Amino)plumbylene-Substituted Phosphaketene: New Pathway for Phosphinidene Synthesis. Chemistry 2022; 28:e202201615. [PMID: 35638144 PMCID: PMC9401577 DOI: 10.1002/chem.202201615] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Indexed: 12/27/2022]
Abstract
A stable (amino)plumbylene‐substituted phosphaketene 3 was synthesized by the successive reactions of PbCl2 with two anionic reagents (lithium amidophosphine and NaPCO). Of particular interest, the thermal evolution of 3, at 80 °C, leads to the transient formation of corresponding amino‐ and phosphanylidene‐phosphaketenes (6 and 7), via a reductive elimination at the PbII center forming new N−P and P−P bonds. Further evolution of 6 gives a new cyclic (amino)phosphanylidene phosphorane 4, which shows a unique reactivity as a phosphinidene. This result provides a new synthetic route to phosphinidenes, extending and facilitating further their access.
Collapse
Affiliation(s)
- Vladislava Timofeeva
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France.,N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russia
| | - José Miguel Léon Baeza
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France.,Departamento de Química Inorganica, Facultad de Química, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, 22, Chile
| | - Raphael Nougué
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Mikhail Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russia
| | - Rene Segundo Rojas Guerrero
- Departamento de Química Inorganica, Facultad de Química, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, 22, Chile
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (FR 2599), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Gül Altınbaş Özpınar
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26111, Oldenburg, Germany
| | - Saskia Rathjen
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26111, Oldenburg, Germany
| | - Thomas Müller
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26111, Oldenburg, Germany
| | - Antoine Baceiredo
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Tsuyoshi Kato
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| |
Collapse
|
9
|
Gupta P, Taeufer T, Siewert JE, Reiß F, Drexler HJ, Pospech J, Beweries T, Hering-Junghans C. Synthesis, Coordination Chemistry, and Mechanistic Studies of P,N-Type Phosphaalkene-Based Rh(I) Complexes. Inorg Chem 2022; 61:11639-11650. [PMID: 35856631 DOI: 10.1021/acs.inorgchem.2c01158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of P,N-phosphaalkene ligands, py-CH═PMes* (1, py = 2-pyridyl, Mes* = 2,4,6-tBu-C6H2) and the novel quin-CH═PMes* (2, quin = 2-quinolinyl) is described. The reaction with [Rh(μ-Cl)cod]2 produces Rh(I) bis(phosphaalkene) chlorido complexes 3 and 4 with distorted trigonal bipyramidal coordination environments. Complexes 3 and 4 show a pronounced metal-to-ligand charge transfer (MLCT) from Rh into the ligand P═C π* orbitals. Upon heating, quinoline-based complex 4 undergoes twofold C-H bond activation at the o-tBu groups of the Mes* substituents to yield the cationic bis(phosphaindane) Rh(I) complex 5, which could not be observed for the pyridine-based analogue 3. Using sub- or superstoichiometric amounts of AgOTf the C-H bond activation at an o-tBu group of one or at both Mes* was detected, respectively. Density functional theory (DFT) studies suggest an oxidative proton shift pathway as an alternative to a previously reported high-barrier oxidative addition at Rh(I). The Rh(I) mono- and bis(phosphaindane) triflate complexes 6 and 7, respectively, undergo deprotonation at the benzylic CH2 group of the phosphaindane unit in the presence of KOtBu to furnish neutral, distorted square-planar Rh(I) complexes 8 and 9, respectively, with one of the P,N ligands being dearomatized. All complexes were fully characterized, including multinuclear NMR, vibrational, and ultraviolet-visible (UV-vis) spectroscopy, as well as single-crystal X-ray and elemental analysis.
Collapse
Affiliation(s)
- Priyanka Gupta
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Tobias Taeufer
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Jan-Erik Siewert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Fabian Reiß
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Hans-Joachim Drexler
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Jola Pospech
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Torsten Beweries
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | | |
Collapse
|
10
|
Dankert F, Siewert JE, Gupta P, Weigend F, Hering-Junghans C. Metal‐free N‐H Bond Activation by Phospha‐Wittig Reagents. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207064] [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)
- Fabian Dankert
- Leibniz-Institut fur Katalyse eV Catalysis with Bioresources GERMANY
| | - Jan-Erik Siewert
- Leibniz-Institut fur Katalyse eV Catalysis with Bioresources GERMANY
| | - Priyanka Gupta
- Leibniz-Institut fur Katalyse eV Modern Concepts in Molecular Catalysis GERMANY
| | - Florian Weigend
- Philipps-Universitat Marburg Fachbereich Chemie Fachbereich Chemie GERMANY
| | - Christian Hering-Junghans
- Leibniz Institute for Catalysis: Leibniz-Institut fur Katalyse eV Catalysis with Bioresources Albert-Einstein-Straße 29a 18059 Rostock GERMANY
| |
Collapse
|
11
|
Fischer M, Roy MMD, Wales LL, Ellwanger MA, Heilmann A, Aldridge S. Structural Snapshots in Reversible Phosphinidene Transfer: Synthetic, Structural, and Reaction Chemistry of a Sn═P Double Bond. J Am Chem Soc 2022; 144:8908-8913. [PMID: 35536684 PMCID: PMC9136930 DOI: 10.1021/jacs.2c03302] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of amido-substituted stannylenes with phospha-Wittig reagents (Me3PPR) results in release of hexamethyldisilazane and tethering of the resulting -CH2PMe2PR fragment to the tin center to give P-donor stabilized stannylenes featuring four-membered Sn,C,P,P heterocycles. Through systematic increases in steric loading, the structures of these systems in the solid state can be tuned, leading to successive P-P bond lengthening and Sn-P contraction and, in the most encumbered case, to complete P-to-Sn transfer of the phosphinidene fragment. The resulting stannaphosphene features a polar Sn═P double bond as determined by structural and computational studies. The reversibility of phosphinidene transfer can be established by solution phase measurements and reactivity studies.
Collapse
Affiliation(s)
- Malte Fischer
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Matthew M D Roy
- Department of Chemistry, Catalysis Research Center and Institute for Silicon Chemistry, Technische Universität München, 85748 Garching bei München, Germany
| | - Lewis L Wales
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Mathias A Ellwanger
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Andreas Heilmann
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| |
Collapse
|
12
|
Dankert F, Hering-Junghans C. Heavier group 13/15 multiple bond systems: synthesis, structure and chemical bond activation. Chem Commun (Camb) 2022; 58:1242-1262. [PMID: 35014640 DOI: 10.1039/d1cc06518a] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Heavier group 13/15 multiple bonds have been under investigation since the late 80s and to date, several examples have been published, which shows the obsoleteness of the so-called double bond rule. Especially in the last few years, more and more group 13/15 multiple bonds became synthetically feasible and their application in terms of small molecule activation has been demonstrated. Our group has recently shown that the combination of the pnictinidene precursor DipTer-Pn(PMe3) (Pn = P, As) in combination with Al(I) synthons afforded the first examples of phospha- and arsaalumenes as isolable and thermally robust compounds. This feature article is intended to show the recent developments in the field, to outline early synthetic approaches and to discuss strategies to unlock the synthetic potential of these elusive chemical bonds.
Collapse
Affiliation(s)
- F Dankert
- Leibniz Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29A, 18059 Rostock, Germany.
| | - C Hering-Junghans
- Leibniz Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29A, 18059 Rostock, Germany.
| |
Collapse
|
13
|
Dankert F, Fischer M, Hering-Junghans C. Modulating the reactivity of phosphanylidenephosphoranes towards water with Lewis acids. Dalton Trans 2022; 51:11267-11276. [DOI: 10.1039/d2dt01575g] [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
Phosphanylidenephosphoranes of the type R−P(PR’3), also known as phospha-Wittig reagents, can be utilized in a variety of bond activation reactions exploiting their phosphinidenoid reactivity. In here, we thoroughly show that...
Collapse
|
14
|
Le Corre G, Gamboa‐Carballo JJ, Li Z, Grützmacher H. Cyano(triphenylsilyl)phosphanide as a Building Block for P,C,N Conjugated Molecules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Grégoire Le Corre
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog Weg 1 Hönggerberg 8093 Zürich Switzerland
| | - Juan José Gamboa‐Carballo
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog Weg 1 Hönggerberg 8093 Zürich Switzerland
- Higher Institute of Technologies and Applied Sciences (InSTEC) University of Havana Ave. S Allende 1110 10600 Havana Cuba
| | - Zhongshu Li
- Lehn Institute of Functional Materials (LIFM) School of Chemistry Sun Yat-Sen University Guangzhou 510275 China
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog Weg 1 Hönggerberg 8093 Zürich Switzerland
| |
Collapse
|
15
|
Le Corre G, Gamboa-Carballo JJ, Li Z, Grützmacher H. Cyano(triphenylsilyl)phosphanide as a Building Block for P,C,N Conjugated Molecules. Angew Chem Int Ed Engl 2021; 60:24817-24822. [PMID: 34463413 PMCID: PMC9297940 DOI: 10.1002/anie.202108295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/16/2021] [Indexed: 11/29/2022]
Abstract
The cyano(triphenylsilyl)phosphanide anion was prepared as a sodium salt from 2‐phosphaethynolate. The electronic structure of this new cyano(silyl)phosphanide was studied via computational methods and its reactivity investigated using various electrophiles and Lewis acids, demonstrating its P‐ and N‐nucleophilicity. The ambident reactivity is in agreement with computations. The silyl group also shows lability and therefore the cyano(silyl)phosphanide can be considered as a phosphacyanamide synthon, [PCN]2−, and serves as building block for the transfer of a PCN moiety.
Collapse
Affiliation(s)
- Grégoire Le Corre
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg 1, Hönggerberg, 8093 Zürich, Switzerland
| | - Juan José Gamboa-Carballo
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg 1, Hönggerberg, 8093 Zürich, Switzerland.,Higher Institute of Technologies and Applied Sciences (InSTEC), University of Havana, Ave. S Allende 1110, 10600, Havana, Cuba
| | - Zhongshu Li
- Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg 1, Hönggerberg, 8093 Zürich, Switzerland
| |
Collapse
|