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Alférez MG, Moreno JJ, Maya C, Campos J. Polarized Au(I)/Rh(I) bimetallic pairs cooperatively trigger ligand non-innocence and bond activation. Dalton Trans 2023; 52:3835-3845. [PMID: 36866716 PMCID: PMC10029337 DOI: 10.1039/d3dt00410d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 02/21/2023] [Indexed: 02/24/2023]
Abstract
The combination of molecular metallic fragments of contrasting Lewis character offers many possibilities for cooperative bond activation and for the disclosure of unusual reactivity. Here we provide a systematic investigation on the partnership of Lewis basic Rh(I) compounds of type [(η5-L)Rh(PR3)2] (η5-L = (C5Me5)- or (C9H7)-) with highly congested Lewis acidic Au(I) species. For the cyclopentadienyl Rh(I) compounds, we demonstrate the non-innocent role of the typically robust (C5Me5)- ligand through migration of a hydride to the Rh site and provide evidence for the direct implication of the gold fragment in this unusual bimetallic ligand activation event. This process competes with the formation of dinuclear Lewis adducts defined by a dative Rh → Au bond, with selectivity being under kinetic control and tunable by modifying the stereoelectronic and chelating properties of the phosphine ligands bound to the two metals. We provide a thorough computational study on the unusual Cp* non-innocent behavior and the divergent bimetallic pathways observed. The cooperative FLP-type reactivity of all bimetallic pairs has been investigated and computationally examined for the case of N-H bond activation in ammonia.
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Affiliation(s)
- Macarena G Alférez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Juan J Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Celia Maya
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
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2
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Wickemeyer L, Hartmann L, Neumann B, Stammler H, Mitzel NW. Differences in the Reactivity of Geminal Si-O-P and Al-O-P Frustrated Lewis Pairs. Chemistry 2023; 29:e202202842. [PMID: 36349870 PMCID: PMC10107522 DOI: 10.1002/chem.202202842] [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: 09/12/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/11/2022]
Abstract
The new oxygen-bridged geminal Si/P Frustrated Lewis Pair (FLP) tBu2 P-O-Si(C2 F5 )3 (2) is able to reversibly bind carbon dioxide at ambient temperature. We compared its reactivity towards benzil, but-3-en-2-one, nitriles and phenylacetylene to that of the Al/P FLP tBu2 P-O-AlBis2 (Bis=-CH(SiMe3 )2 ) (1). When reacted with benzil, both, 1 and 2, form the 1,2-addition product, but in the Si/P FLP 2, the second carbonyl function additionally binds to the silicon atom. With but-3-en-2-one 2 forms the 1,2-addition product, while 1 binds in 1,4-position. The reaction with acetonitrile yielded an unexpected etheneimine adduct for both systems, while only 1 reacted with tert-butylnitrile. With benzonitrile and acrylonitrile, 2 showed reversible addition to the C≡N bond and 1 forms a stable adduct with benzonitrile. Solely 1 shows reactivity towards phenylacetylene affording a mixture of the CH deprotonation adduct tBu2 P(H)-O-AlBis2 (CCPh) and the FLP -C≡C 1,2-addition adduct under ring formation. All compounds were characterized by multinuclear NMR spectroscopy, XRD and elemental analysis.
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Affiliation(s)
- Lucas Wickemeyer
- Lehtuhl für Anorganische Chemie und Strukturchemie andCentrum für Molekulare Materialen CM2Fakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Lukas Hartmann
- Lehtuhl für Anorganische Chemie und Strukturchemie andCentrum für Molekulare Materialen CM2Fakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Beate Neumann
- Lehtuhl für Anorganische Chemie und Strukturchemie andCentrum für Molekulare Materialen CM2Fakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Hans‐Georg Stammler
- Lehtuhl für Anorganische Chemie und Strukturchemie andCentrum für Molekulare Materialen CM2Fakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Norbert W. Mitzel
- Lehtuhl für Anorganische Chemie und Strukturchemie andCentrum für Molekulare Materialen CM2Fakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
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3
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Tomomatsu K, Yamada Y, Koga Y, Matsubara K. Formation of Nickel(II) Cyanomethyl Complex Bearing Tridentate 1,2,3-Triazolylidene. CHEM LETT 2022. [DOI: 10.1246/cl.220232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kanta Tomomatsu
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Yuji Yamada
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Yuji Koga
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Kouki Matsubara
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
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4
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Synthesis of new coordination complexes of MF5 (M = Nb, Ta), and insights into the Ta(V) reduction. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Rahman MM, Smith MD, Peryshkov DV. Imido Group Interchange in Reactions of Zwitterionic Tantalum(V) Vinylimido Complexes and Nitriles. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Md. Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Dmitry V. Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
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6
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Bader J, Neumann B, Stammler HG, Ignat'ev N, Hoge B. Activation of Acetonitrile with (C 2 F 5 ) 3 PF 2 and Amines. Chemistry 2018; 24:6975-6982. [PMID: 29488665 DOI: 10.1002/chem.201800682] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Indexed: 11/10/2022]
Abstract
Acetonitrile is deprotonated by a combination of the strong Lewis acid (C2 F5 )3 PF2 and triethylamine. The resulting cyanomethyl function is bound to the phosphorus moiety, affording the highly stable salt [HNEt3 ][P(C2 F5 )3 F2 (CH2 CN)]. Salt metathesis reactions furnished the corresponding [Cu(MeCN)2 ]+ and [Ag(MeCN)]+ derivatives in which the CH2 CN substituent of the anion [P(C2 F5 )3 F2 (CH2 CN)]- coordinates to the metal. An investigation of the gas separation capability of the silver salt [Ag(MeCN)][P(C2 F5 )3 F2 (CH2 CN)] shows an uptake of 1.7 equivalents of isobutene from a propane/isobutene mixture. The reaction of (C2 F5 )3 PF2 with acetonitrile and diethylamine furnishes [P(C2 F5 )3 F2 {NHC(CH3 )NEt2 }]-a phosphate featuring an amidine ligand which formally results from hydroamination of acetonitrile by HNEt2 . Exchange of HNEt2 with the primary amines H2 NPh and H2 NBu leads to comparable amidine salts that exhibit a solvent-dependent conformational isomerism.
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Affiliation(s)
- Julia Bader
- Centrum für Molekulare Materialien, Fakultät für Chemie, Anorganische Chemie, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Beate Neumann
- Centrum für Molekulare Materialien, Fakultät für Chemie, Anorganische Chemie, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Hans-Georg Stammler
- Centrum für Molekulare Materialien, Fakultät für Chemie, Anorganische Chemie, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Nikolai Ignat'ev
- Consultant, Merck KGaA, Frankfurter Str. 250, 64293, Darmstadt, Germany
| | - Berthold Hoge
- Centrum für Molekulare Materialien, Fakultät für Chemie, Anorganische Chemie, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
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Bartalucci N, Bortoluzzi M, Pampaloni G, Pinzino C, Zacchini S, Marchetti F. Stable coordination complexes of α-diimines with Nb(v) and Ta(v) halides. Dalton Trans 2018; 47:3346-3355. [DOI: 10.1039/c8dt00122g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uncommon coordination compounds of high valent transition metal halides with N-aryl α-diimines have been obtained, without the need for reducing agents to quench the activation power of the metal centre.
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Affiliation(s)
- Niccolò Bartalucci
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
- CIRCC
| | - Marco Bortoluzzi
- CIRCC
- I-70126 Bari
- Italy
- Università Ca’ Foscari Venezia
- Dipartimento di Scienze Molecolari e Nanosistemi
| | - Guido Pampaloni
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
- CIRCC
| | | | - Stefano Zacchini
- CIRCC
- I-70126 Bari
- Italy
- Università di Bologna
- Dipartimento di Chimica Industriale “Toso Montanari”
| | - Fabio Marchetti
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
- CIRCC
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8
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Stogniy MY, Erokhina SA, Suponitsky KY, Anisimov AA, Sivaev IB, Bregadze VI. Nucleophilic addition reactions to the ethylnitrilium derivative of nido-carborane 10-EtCN-7,8-C2B9H11. NEW J CHEM 2018. [DOI: 10.1039/c8nj04192j] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stable imidates 10-EtC(OR)HN-7,8-C2B9H11 and thioimidates 10-EtC(SR)HN-7,8-C2B9H11 were synthesized via the reactions of a nitrilium derivative of nido-carborane 10-EtCN-7,8-C2B9H11 with alcohols and thiols.
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Affiliation(s)
- Marina Yu. Stogniy
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
- Moscow
- Russia
| | - Svetlana A. Erokhina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
- Moscow
- Russia
| | - Kyrill Yu. Suponitsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
- Moscow
- Russia
| | | | - Igor B. Sivaev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
- Moscow
- Russia
| | - Vladimir I. Bregadze
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
- Moscow
- Russia
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Rahman MM, Smith MD, Amaya JA, Makris TM, Peryshkov DV. Activation of C-H Bonds of Alkyl- and Arylnitriles by the TaCl 5-PPh 3 Lewis Pair. Inorg Chem 2017; 56:11798-11803. [PMID: 28902998 DOI: 10.1021/acs.inorgchem.7b01800] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new pathway of activation of C-H bonds of alkyl- and arylnitriles by a cooperative action of TaCl5 and PPh3 under mild conditions is reported. Coordination of nitriles to the highly Lewis acidic Ta(V) center resulted in an activation of their aliphatic and aromatic C-H bonds, allowing nucleophilic attack and deprotonation by the relatively weak base PPh3. The propensity of Ta(V) to form multiple bonds to nitrogen-containing ligands is an important driving force of the reaction as it led to a sequence of bond rearrangements and the emergence of, in the case of benzonitrile, a zwitterionic enediimido complex of Ta(V) through C═C double bond formation between two activated nitrile fragments. These transformations highlight the special role of the high-valent transition metal halide in substrate activation and distinguish the reactivity of the TaCl5-PPh3 system from both non-metal- and late transition metal-based frustrated Lewis pairs.
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Affiliation(s)
- Md Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Mark D Smith
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - José A Amaya
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Thomas M Makris
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
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10
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Biancalana L, Bortoluzzi M, Ferretti E, Hayatifar M, Marchetti F, Pampaloni G, Zacchini S. The reactions of α-amino acids and α-amino acid esters with high valent transition metal halides: synthesis of coordination complexes, activation processes and stabilization of α-ammonium acylchloride cations. RSC Adv 2017. [DOI: 10.1039/c7ra00073a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We describe the synthesis of rare coordination compounds of early transition metals with α-amino acids and α-amino acid esters, the unusual C–C dimerization ofl-proline, and the stabilization of reactive α-ammonium acylchloride cations.
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Affiliation(s)
- Lorenzo Biancalana
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Marco Bortoluzzi
- Ca' Foscari University of Venice
- Dipartimento di Scienze Molecolari e Nanosistemi
- I-30175 Mestre
- Italy
| | - Eleonora Ferretti
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Mohammad Hayatifar
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Fabio Marchetti
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Guido Pampaloni
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Stefano Zacchini
- University of Bologna
- Dipartimento di Chimica Industriale “Toso Montanari”
- I-40136 Bologna
- Italy
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