1
|
Pachisia S, Kishan R, Yadav S, Gupta R. Half-Sandwich Ruthenium Complexes of Amide-Phosphine Based Ligands: H-Bonding Cavity Assisted Binding and Reduction of Nitro-substrates. Inorg Chem 2021; 60:2009-2022. [PMID: 33459009 DOI: 10.1021/acs.inorgchem.0c03505] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present synthesis and characterization of two half-sandwich Ru(II) complexes supported with amide-phosphine based ligands. These complexes presented a pyridine-2,6-dicarboxamide based pincer cavity, decorated with hydrogen bonds, that participated in the binding of nitro-substrates closer to the Ru(II) centers, which is further supported with binding and docking studies. These ruthenium complexes functioned as the noteworthy catalysts for the borohydride mediated reduction of assorted nitro-substrates. Mechanistic studies not only confirmed the intermediacy of [Ru-H] in the reduction but also asserted the involvement of several organic intermediates during the course of the catalysis. A similar Ru(II) complex that lacked pyridine-2,6-dicarboxamide based pincer cavity substantiated its unique role both in the substrate binding and the subsequent catalysis.
Collapse
Affiliation(s)
- Sanya Pachisia
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ram Kishan
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Samanta Yadav
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
| |
Collapse
|
2
|
Provinciali G, Bortoluzzi M, Funaioli T, Zacchini S, Campanella B, Pampaloni G, Marchetti F. Tetrasubstituted Selenophenes from the Stepwise Assembly of Molecular Fragments on a Diiron Frame and Final Cleavage of a Bridging Alkylidene. Inorg Chem 2020; 59:17497-17508. [PMID: 33205950 PMCID: PMC8016200 DOI: 10.1021/acs.inorgchem.0c02748] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
A series
of 2,3-dicarboxylato-5-acetyl-4-aminoselenophenes, 5a–j, was obtained via the uncommon assembly
of building blocks on a diiron platform, starting from commercial
[Fe2Cp2(CO)4] through the stepwise
formation of diiron complexes [2a–d]CF3SO3, 3a–d, and 4a–j. The selenophene-substituted
bridging alkylidene ligand in 4a–j is removed from coordination upon treatment with water in air under
mild conditions (ambient temperature in most cases), affording 5a–j in good to excellent yields. This
process is highly selective and is accompanied by the disruption of
the organometallic scaffold: cyclopentadiene (CpH) and lepidocrocite
(γ-FeO(OH)) were identified by NMR and Raman analyses at the
end of one representative reaction. The straightforward cleavage of
the linkage between a bridging Fischer alkylidene and two (or more)
metal centers, as observed here, is an unprecedented reaction in organometallic
chemistry: in the present case, the carbene function is converted
to a ketone which is incorporated into the organic product. DFT calculations
and electrochemical experiments were carried out to give insight into
the release of the selenophene-alkylidene ligand. Compounds 5a–j were fully characterized by elemental
analysis, mass spectrometry, IR, and multinuclear NMR spectroscopy
and by X-ray diffraction and cyclic voltammetry in one case. Metal−metal cooperativity in action!
Different fragments
are combined on the {Fe2Cp2(CO)2}
skeleton to give highly functionalized selenophene ligands, linked
to the iron centers through a bridging alkylidene, which is easily
removed from coordination by exposure to air/water in ethereal solution.
Collapse
Affiliation(s)
- Giacomo Provinciali
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Marco Bortoluzzi
- Dipartimento di Scienze Molecolari e Nanosistemi, Ca' Foscari Università di Venezia, Via Torino 155, I-30170 Mestre (VE), Italy
| | - Tiziana Funaioli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Beatrice Campanella
- Istituto di Chimica dei Composti Organometallici, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
| |
Collapse
|
3
|
Petrone DA, Isomura M, Franzoni I, Rössler SL, Carreira EM. Allenylic Carbonates in Enantioselective Iridium-Catalyzed Alkylations. J Am Chem Soc 2018; 140:4697-4704. [DOI: 10.1021/jacs.8b01416] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- David A. Petrone
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | - Mayuko Isomura
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | - Ivan Franzoni
- Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
| | - Simon L. Rössler
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | | |
Collapse
|
4
|
Gómez M, Rendón N, Álvarez E, Mereiter K, Poveda ML, Paneque M. Functionalization of 3-Iridacyclopentenes. Chemistry 2017; 23:16346-16356. [PMID: 28898483 DOI: 10.1002/chem.201703535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 11/10/2022]
Abstract
Members of a series of iridacyclopentenes of composition [TpMe2 Ir(k2 -C,C-CH2 CR'=CRCH2 )(CO)] (TpMe2 =hydrotris(3,5-dimethylpyrazolyl)borate; R=R'=H, 1; R=Me, R'=H, 2; R=R'=Me, 3) have been subjected to common organic chemistry procedures for hydrogenation, cyclopropanation, epoxidation, water addition through hydroboration, cis-dihydroxylation, and ozonolysis. The stability of metallacycles 1-3, imparted by the presence of the co-ligands TpMe2 and CO, directs the reactivity towards the C=C double bonds, and furthermore the stereochemistry of the products formed is strongly dictated by the steric demands of the TpMe2 ligand. While the products obtained in some of the above-mentioned reactions are the expected ones from an organic chemistry point of view, in other cases the results differ from the outcomes of similar reactions carried out with the all-carbon counterparts.
Collapse
Affiliation(s)
- Margarita Gómez
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Nuria Rendón
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Kurt Mereiter
- Department of Chemistry, Vienna University of Technology, Gestreidemarkt 9/164SC, 1060, Vienna, Austria
| | - Manuel L Poveda
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Margarita Paneque
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| |
Collapse
|
5
|
Serrano ÁL, Casado MA, Ciriano MA, de Bruin B, López JA, Tejel C. Nucleophilicity and P-C Bond Formation Reactions of a Terminal Phosphanido Iridium Complex. Inorg Chem 2016; 55:828-39. [PMID: 26695592 DOI: 10.1021/acs.inorgchem.5b02301] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The diiridium complex [{Ir(ABPN2)(CO)}2(μ-CO)] (1; [ABPN2](-) = [(allyl)B(Pz)2(CH2PPh2)](-)) reacts with diphenylphosphane affording [Ir(ABPN2)(CO)(H) (PPh2)] (2), the product of the oxidative addition of the P-H bond to the metal. DFT studies revealed a large contribution of the terminal phosphanido lone pair to the HOMO of 2, indicating nucleophilic character of this ligand, which is evidenced by reactions of 2 with typical electrophiles such as H(+), Me(+), and O2. Products from the reaction of 2 with methyl chloroacetate were found to be either [Ir(ABPN2)(CO)(H)(PPh2CH2CO2Me)][PF6] ([6]PF6) or [Ir(ABPN2)(CO)(Cl)(H)] (7) and the free phosphane (PPh2CH2CO2Me), both involving P-C bond formation, depending on the reaction conditions. New complexes having iridacyclophosphapentenone and iridacyclophosphapentanone moieties result from reactions of 2 with dimethyl acetylenedicarboxylate and dimethyl maleate, respectively, as a consequence of a further incorporation of the carbonyl ligand. In this line, the terminal alkyne methyl propiolate gave a mixture of a similar iridacyclophosphapentanone complex and [Ir(ABPN2){CH═C(CO2Me)-CO}{PPh2-CH═CH(CO2Me)}] (10), which bears the functionalized phosphane PPh2-CH═CH(CO2Me) and an iridacyclobutenone fragment. Related model reactions aimed to confirm mechanistic proposals are also studied.
Collapse
Affiliation(s)
- Ángel L Serrano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Miguel A Casado
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Bas de Bruin
- Homogeneous and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| |
Collapse
|
6
|
Sarker JC, Raha AK, Ghosh S, Hogarth G, Kabir SE, Richmond MG. Backbone modified small bite-angle diphosphines: Synthesis, structure, and DFT evaluation of the thermal activation products based on Os3(CO)10{μ-Ph2PC(Me)2PPh2}. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.10.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
MacDougall TJ, Ferguson MJ, McDonald R, Cowie M. Diverse Coordination Modes and Transformations of Allenes at Adjacent Iridium/Osmium Centers. Organometallics 2012. [DOI: 10.1021/om300316h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Tiffany J. MacDougall
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Michael J. Ferguson
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Robert McDonald
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Martin Cowie
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| |
Collapse
|
8
|
Marchetti F, Zacchini S, Zanotti V. Unprecedented Transformation of Diiron Bridging Vinyliminium Ligands into Carboxyamido- and Alkylphosphonate-Vinylalkylidenes. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200050] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
9
|
Slaney ME, Anderson DJ, Ferguson MJ, McDonald R, Cowie M. Bis(diethylphosphino)methane As a Bridging Ligand in Complexes of Ir2, Rh2, and IrRh: Geminal C–H Activation of α-Olefins. Organometallics 2012. [DOI: 10.1021/om201214z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Michael E. Slaney
- Department of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta
T6G 2G2, Canada
| | - D. Jason Anderson
- Department of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta
T6G 2G2, Canada
| | - Michael J. Ferguson
- Department of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta
T6G 2G2, Canada
| | - Robert McDonald
- Department of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta
T6G 2G2, Canada
| | - Martin Cowie
- Department of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta
T6G 2G2, Canada
| |
Collapse
|
10
|
MacDougall TJ, Samant RG, Trepanier SJ, Ferguson MJ, McDonald R, Cowie M. Geminal Carbon–Hydrogen Bond Activation in Cumulenes Promoted by Adjacent Iridium/Ruthenium Centers. Organometallics 2012. [DOI: 10.1021/om201201h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Tiffany J. MacDougall
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Rahul G. Samant
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Steven J. Trepanier
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Michael J. Ferguson
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Robert McDonald
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Martin Cowie
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| |
Collapse
|