1
|
Wang Y, Tran PM, Lahm ME, Xie Y, Wei P, Adams ER, Glushka JN, Ren Z, Popik VV, Schaefer HF, Robinson GH. Activation of Ammonia by a Carbene-Stabilized Dithiolene Zwitterion. J Am Chem Soc 2022; 144:16325-16331. [PMID: 36037279 DOI: 10.1021/jacs.2c07920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A carbene-stabilized dithiolene zwitterion (3) activates ammonia, affording 4• and 5, through both single-electron transfer (SET) and hydrogen atom transfer (HAT). Reaction products were characterized spectroscopically and by single-crystal X-ray diffraction. The mechanism of the formation of 4• and 5 was probed by experimental and computational methods. This discovery is the first example of metal-free ammonia activation via HAT.
Collapse
Affiliation(s)
- Yuzhong Wang
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Phuong M Tran
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Mitchell E Lahm
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Yaoming Xie
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Pingrong Wei
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Earle R Adams
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - John N Glushka
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Zichun Ren
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Vladimir V Popik
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Henry F Schaefer
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gregory H Robinson
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| |
Collapse
|
2
|
Meng Q, Zhu B, Sakaki S. Theoretical Study of N-H σ-Bond Activation by Nickel(0) Complex: Reaction Mechanism, Electronic Processes, and Prediction of Better Ligand. Inorg Chem 2022; 61:8715-8728. [PMID: 35621263 DOI: 10.1021/acs.inorgchem.2c00612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
N-H σ-bond activation of alkylamine by Ni(PCy3) was investigated using density functional theory (DFT) calculations. When simple alkylamine NHMe2 is a reactant, both concerted oxidative addition in Ni(PCy3)(NHMe2) and ligand-to-ligand H transfer reaction in Ni(PCy3)(C2H4)(NHMe2) are endergonic and need a high activation energy. When NH(Me)(Bs) (Bs = SO2Ph, a model of tosyl group used in experiments) is a reactant, both reactions are exergonic and occur easily with a much smaller activation energy. The much larger reactivity of NH(Me)(Bs) than that of NHMe2 results from the stronger Ni-N(Me)(Bs) bond than the Ni-NMe2 bond and the presence of the Ni-O bonding interaction between the Bs group and the Ni atom in the product. N-Heterocyclic carbene, 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr), is computationally predicted to be better than PCy3 because the Ni-NMe2 and Ni-N(Me)(Bs) bonds in the IPr complex are stronger, respectively, than those of the PCy3 complex. The introduction of the electron-withdrawing Bs group to the N atom of amine and the use of IPr as a ligand are recommended for the N-H σ-bond activation. The C-H σ-bond activations of benzene via the oxidative addition and the ligand-to-ligand H transfer reaction were also investigated here for comparison with the N-H σ-bond activation. The differences between the C-H σ-bond activation of benzene and the N-H σ-bond activation of these amines are discussed in terms of the N-H, C-H, Ni-Ph, and Ni-NMe2, and Ni-N(Me)(Bs) bond energies and back-donation to benzene from the Ni atom.
Collapse
Affiliation(s)
- Qingxi Meng
- College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, People's Republic of China
| | - Bo Zhu
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan
| | - Shigeyoshi Sakaki
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan
| |
Collapse
|
3
|
Abbenseth J, Townrow OPE, Goicoechea JM. Thermoneutral N−H Bond Activation of Ammonia by a Geometrically Constrained Phosphine. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Josh Abbenseth
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
| | - Oliver P. E. Townrow
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
| | - Jose M. Goicoechea
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
| |
Collapse
|
4
|
Abbenseth J, Townrow OPE, Goicoechea JM. Thermoneutral N-H Bond Activation of Ammonia by a Geometrically Constrained Phosphine. Angew Chem Int Ed Engl 2021; 60:23625-23629. [PMID: 34478227 PMCID: PMC8596738 DOI: 10.1002/anie.202111017] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Indexed: 01/07/2023]
Abstract
A geometrically constrained phosphine bearing a tridentate NNS pincer ligand is reported. The effect of the geometric constraint on the electronic structure was probed by theoretical calculations and derivatization reactions. Reactions with N-H bonds result in formation of cooperative addition products. The thermochemistry of these transformations is strongly dependent on the substrate, with ammonia activation being thermoneutral. This represents the first example of a molecular compound that reversibly activates ammonia via N-H bond scission in solution upon mild heating.
Collapse
Affiliation(s)
- Josh Abbenseth
- Department of ChemistryUniversity of Oxford12 Mansfield RoadOX1 3TAOxfordUK
| | | | - Jose M. Goicoechea
- Department of ChemistryUniversity of Oxford12 Mansfield RoadOX1 3TAOxfordUK
| |
Collapse
|
5
|
Das A, Chatani N. Rh(II)-Catalyzed C-H Alkylation of Benzylamines with Unactivated Alkenes: The Influence of Acid on Linear and Branch Selectivity. Org Lett 2021; 23:4273-4278. [PMID: 33988384 DOI: 10.1021/acs.orglett.1c01224] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Rh-catalyzed C-H alkylation of benzylamine derivatives with unactivated 1-alkenes that proceeds via a picolinamide directing group is reported. The crucial role of an acid additive in this transformation is confirmed. Aromatic acids showed high linear selectivity, and aliphatic acids provided branched alkylation products as the major product. The reaction has a broad scope for benzylamines and alkenes. Deuterium labeling experiments suggest that a Rh-carbene intermediate is involved in the case of linear product formation. A different reaction pathway, however, appears to be involved in the case of branched alkylation products, and this pathway also appeared to be a minor pathway in linear-selective reactions.
Collapse
Affiliation(s)
- Amrita Das
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| |
Collapse
|
6
|
Hollenhorst H, McDonald R, Ferguson M, Turculet L. Synthesis of Rhodium and Iridium Complexes Supported by Bis(indolylphosphino)silyl Pincer Ligation: Competitive N–H and C–H Bond Activation by an Ir(I) Species. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Helia Hollenhorst
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Robert McDonald
- X-ray Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Michael Ferguson
- X-ray Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Laura Turculet
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| |
Collapse
|
7
|
Au YK, Zhang J, Quan Y, Xie Z. Ir-Catalyzed Selective B(3)-H Amination of o-Carboranes with NH3. J Am Chem Soc 2021; 143:4148-4153. [DOI: 10.1021/jacs.1c00593] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yik Ki Au
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| | - Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| | - Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| |
Collapse
|
8
|
Das A, Chatani N. Rh(i)- and Rh(ii)-catalyzed C-H alkylation of benzylamines with alkenes and its application in flow chemistry. Chem Sci 2021; 12:3202-3209. [PMID: 34164088 PMCID: PMC8179371 DOI: 10.1039/d0sc05813k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The Rh-catalyzed C–H alkylation of benzylamines with alkenes using a picolinamide derivative as a directing group is reported. Both Rh(i) and Rh(ii) complexes can be used as active catalysts for this transformation. In addition, a flow set up was designed to successfully mimic this process under flow conditions. Several examples are presented under flow conditions and it was confirmed that a flow process is advantageous over a batch process. Deuterium labelling experiments were performed to elucidate the mechanism of the reaction, and the results indicated a possible carbene mechanism for this C–H alkylation process. Rh(i)- and Rh(ii)-catalyzed C–H alkylation of benzylamines with alkenes using a picolinamide derivative as a directing group is reported under both batch and flow.![]()
Collapse
Affiliation(s)
- Amrita Das
- Department of Applied Chemistry, Faculty of Engineering, Osaka University Suita Osaka 565-0871 Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University Suita Osaka 565-0871 Japan
| |
Collapse
|
9
|
Ríos P, Borge J, Fernández de Córdova F, Sciortino G, Lledós A, Rodríguez A. Ambiphilic boryl groups in a neutral Ni(ii) complex: a new activation mode of H 2. Chem Sci 2020; 12:2540-2548. [PMID: 34164022 PMCID: PMC8179274 DOI: 10.1039/d0sc06014c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 12/21/2020] [Indexed: 12/18/2022] Open
Abstract
The concept of metal-ligand cooperation opens new avenues for the design of catalytic systems that may offer alternative reactivity patterns to the existing ones. Investigations of this concept with ligands bearing a boron center in their skeleton established mechanistic pathways for the activation of small molecules in which the boron atom usually performs as an electrophile. Here, we show how this electrophilic behavior can be modified by the ligand trans to the boron center, evincing its ambiphilic nature. Treatment of diphosphinoboryl (PBP) nickel-methyl complex 1 with bis(catecholato)diboron (B2Cat2) allows for the synthesis of nickel(ii) bis-boryl complex 3 that promotes the clean and reversible heterolytic cleavage of dihydrogen leading to the formation of dihydroborate nickel complex 4. Density functional theory analysis of this reaction revealed that the heterolytic activation of H2 is facilitated by the cooperation of both boryl moieties and the metal atom in a concerted mechanism that involves a Ni(ii)/Ni(0)/Ni(ii) process. Contrary to 1, the boron atom from the PBP ligand in 3 behaves as a nucleophile, accepting a formally protic hydrogen, whereas the catecholboryl moiety acts as an electrophile, receiving the attack from the hydride-like fragment. This manifests the dramatic change in the electronic properties of a ligand by tuning the substituent trans to it and constitutes an unprecedented cooperative mechanism that involves two boryl ligands in the same molecule operating differently, one as a Lewis acid and the other one as a Lewis base, in cooperation with the metal. In addition, reactivity towards different nucleophiles such as amines or ammonia confirmed the electrophilic nature of the Bcat moiety, allowing the formation of aminoboranes.
Collapse
Affiliation(s)
- Pablo Ríos
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
| | - Javier Borge
- Departamento de Química Física y Analítica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo C/Julián Clavería 8 33006 Oviedo Spain
| | - Francisco Fernández de Córdova
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
| | - Giuseppe Sciortino
- Departament de Química, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona Campus UAB 08193 Cerdanyola del Vallès Spain
| | - Agustí Lledós
- Departament de Química, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona Campus UAB 08193 Cerdanyola del Vallès Spain
| | - Amor Rodríguez
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
| |
Collapse
|
10
|
Horstmann M, Drexler HJ, Jannsen N, Baumann W, Heller D. Ammine and amido complexes of rhodium: Synthesis, application and contributions to analytics. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
11
|
Li J, Yang D, Tong P, Wang B, Qu J. Facile C-N coupling of coordinated ammonia and labile carbonyl or acetonitrile promoted by a thiolate-bridged dicobalt reaction scaffold. Dalton Trans 2020; 49:11260-11267. [PMID: 32760933 DOI: 10.1039/d0dt02133d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
At low temperature, interaction of the thiolate-bridged dicobalt carbonyl complex [Cp*Co(i)(μ-SEt)2(CO)CoCp*][I] (Cp* = η5-C5Me5) (1) with NH3 resulted in the C-N coupling of the coordinated CO and amido group that originate from ammonia activation to afford a dicobalt formylamino complex [Cp*Co(μ-SEt)2(μ-η1:η1-O[double bond, length as m-dash]CNH2)CoCp*][I] (2). Interestingly, at relatively high temperatures, the labile CO ligand was replaced by NH3 to give a thiolate-bridged dicobalt ammonia complex [Cp*Co(i)(μ-SEt)2(NH3)CoCp*][I] (3). Subsequently, in the presence of the dehalogenation reagent AgPF6, the Co2S2 scaffold can simultaneously activate NH3 and MeCN to produce the complex [Cp*Co(MeCN)(μ-SEt)2(NH3)CoCp*][PF6]2 (4). Furthermore, in the presence of NaOEt, the facile occurrence of the intramolecular cyclization led to the formation of acetamidino-bridged dicobalt complex [Cp*Co(μ-SEt)2(μ-η1:η1-NH(CCH3)NH)CoCp*][PF6] (5), which may proceed through the nucleophilic attack of amido from NH3 to coordinated MeCN followed by the hydrogen atom transfer process. In the presence of MeCN, treatment of 5 with HBF4 released the corresponding [MeC(NH2)NH2]BF4; meanwhile, the [Co2S2] core structural scaffold remained. In this Co2S2 reaction system, the cooperative activation effect between the two cobalt centers plays an important role for NH3 activation and functionalization.
Collapse
Affiliation(s)
- Jianzhe Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, P. R. China.
| | | | | | | | | |
Collapse
|
12
|
Zhou X, Vasko P, Hicks J, Fuentes MÁ, Heilmann A, Kolychev EL, Aldridge S. Cooperative N-H bond activation by amido-Ge(ii) cations. Dalton Trans 2020; 49:9495-9504. [PMID: 32608471 DOI: 10.1039/d0dt01960g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-heterocyclic carbene (NHC) and tertiary phosphine-stabilized germylium-ylidene cations, [R(L)Ge:]+, featuring tethered amido substituents at R have been synthesized via halide abstraction. Characterization in the solid state by X-ray crystallography shows these systems to be monomeric, featuring a two-coordinate C,N- or P,N-ligated germanium atom. The presence of the strongly Lewis acidic cationic germanium centre and proximal amide function allows for facile cleavage of N-H bonds in 1,2-fashion: the products resulting from reactions with carbazole feature a tethered secondary amine donor bound to a three-coordinate carbazolyl-GeII centre. In each case, addition of the components of the N-H bond occurs to the same face of the germanium amide function, consistent with a coordination/proton migration mechanism. Such as sequence is compatible with the idea that substrate coordination via the pπ orbital at germanium reduces the extent of N-to-Ge π donation from the amide, thereby enhancing the basicity of the proximal N-group.
Collapse
Affiliation(s)
- Xueer Zhou
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Petra Vasko
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK. and Department of Chemistry, Nanoscience Center, University of Jyväskylä, P. O. Box 35, FI-40014 University of Jyväskylä, Finland
| | - Jamie Hicks
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - M Ángeles Fuentes
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Andreas Heilmann
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Eugene L Kolychev
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Simon Aldridge
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| |
Collapse
|
13
|
Do DCH, Protchenko AV, Fuentes MÁ, Hicks J, Vasko P, Aldridge S. N–H cleavage vs. Werner complex formation: reactivity of cationic group 14 tetrelenes towards amines. Chem Commun (Camb) 2020; 56:4684-4687. [DOI: 10.1039/d0cc00875c] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Two-coordinate cations [(N-nacnac)E]+ (E = Si, Ge, Sn) react differently towards ammonia/amines: simple adduct formation (Ge,Sn) contrasts with N–H activation (Si).
Collapse
Affiliation(s)
- Dinh Cao Huan Do
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| | - Andrey V. Protchenko
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| | - M. Ángeles Fuentes
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| | - Jamie Hicks
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| | - Petra Vasko
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| | - Simon Aldridge
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- South Parks Road
- Oxford
| |
Collapse
|
14
|
Angoy M, Jiménez MV, García-Orduña P, Oro LA, Vispe E, Pérez-Torrente JJ. Dinuclear Phosphine-Amido [Rh2(diene){μ-NH(CH2)3PPh2}2] Complexes as Efficient Catalyst Precursors for Phenylacetylene Polymerization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marta Angoy
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - M. Victoria Jiménez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Luis A. Oro
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Eugenio Vispe
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea−ISQCH, Universidad de Zaragoza−CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| |
Collapse
|
15
|
Yuwen J, Brennessel WW, Jones WD. Coordination or Oxidative Addition? Activation of N–H with [Tp′Rh(PMe3)]. Inorg Chem 2018; 58:557-566. [DOI: 10.1021/acs.inorgchem.8b02752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Yuwen
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| |
Collapse
|
16
|
Ghosh S, Banerjee P, Nandi PK. Heterolytic N H bond activation of ammonia by dinuclear [{M(μ-OMe)}2] complexes (M = Sc – V and Mn – Ni): A theoretical investigation. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
17
|
Popoola SA, Ullah N, Al-Saadi AA. Spectroscopic and DFT assessment of bridging ligand effect on the structural and electronic properties of dinuclear iridium- and rhodium-based complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
Hermosilla P, López P, García-Orduña P, Lahoz FJ, Polo V, Casado MA. Amido Complexes of Iridium with a PNP Pincer Ligand: Reactivity toward Alkynes and Hydroamination Catalysis. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00365] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Pablo Hermosilla
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Pablo López
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física and Instituto de Biocomputación y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| |
Collapse
|
19
|
Rej S, Chatani N. Rhodium(I)-Catalyzed C8-Alkylation of 1-Naphthylamide Derivatives with Alkenes through a Bidentate Picolinamide Chelation System. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01675] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| |
Collapse
|
20
|
Munarriz J, Velez E, Casado MA, Polo V. Understanding the reaction mechanism of the oxidative addition of ammonia by (PXP)Ir(i) complexes: the role of the X group. Phys Chem Chem Phys 2018; 20:1105-1113. [PMID: 29238771 DOI: 10.1039/c7cp07453k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An analysis of the electronic rearrangements for the oxidative addition of ammonia to a set of five representative (PXP)Ir pincer complexes (X = B, CH, O, N, SiH) is performed. We aim to understand the factors controlling the activation and reaction energies of this process by combining different theoretical strategies based on DFT calculations. Interestingly, complexes featuring higher activation barriers yield more exothermic reactions. The analysis of the reaction path using the bonding evolution theory shows that the main chemical events, N-H bond cleavage and Ir-H bond formation, take place before the transition structure is reached. Metal oxidation implies an electron density transfer from non-shared Ir pairs to the Ir-N bond. This decrement in the atomic charge of the metal provokes different effects in the ionic contribution of the Ir-X bonding depending on the nature of the X atom as shown by the interacting quantum atoms methodology.
Collapse
Affiliation(s)
- J Munarriz
- Departamento de Química Física and Instituto de Biocomputación y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, 50009, Zaragoza, Spain.
| | | | | | | |
Collapse
|
21
|
Jiménez MV, Fernández-Tornos J, González-Lainez M, Sánchez-Page B, Modrego FJ, Oro LA, Pérez-Torrente JJ. Mechanistic studies on the N-alkylation of amines with alcohols catalysed by iridium(i) complexes with functionalised N-heterocyclic carbene ligands. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02488f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and theoretical studies give support for an iridium-catalyzed C–N bond formation.
Collapse
Affiliation(s)
- M. Victoria Jiménez
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Javier Fernández-Tornos
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Miguel González-Lainez
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Beatriz Sánchez-Page
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - F. Javier Modrego
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Luis A. Oro
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Jesús J. Pérez-Torrente
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| |
Collapse
|
22
|
LaPierre EA, Piers WE, Gendy C. Redox-state dependent activation of silanes and ammonia with reverse polarity (PCcarbeneP)Ni complexes: electrophilic vs. nucleophilic carbenes. Dalton Trans 2018; 47:16789-16797. [DOI: 10.1039/c8dt04409k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A rigidified PCalkylP ligand allowed for the synthesis and characterization of cationic and radical PCCarbeneP nickel complexes in which the carbene anchor of the pincer framework is electrophilic rather than nucleophilic.
Collapse
Affiliation(s)
- Etienne A. LaPierre
- Department of Chemistry
- University of Calgary
- 2500 University Drive NW
- Calgary
- Canada
| | - Warren E. Piers
- Department of Chemistry
- University of Calgary
- 2500 University Drive NW
- Calgary
- Canada
| | - Chris Gendy
- Department of Chemistry
- University of Calgary
- 2500 University Drive NW
- Calgary
- Canada
| |
Collapse
|
23
|
Roy S, Pramanik S, Ghorui T, Dinda S, Patra SC, Pramanik K. Redox-active diaminoazobenzene complexes of rhodium(iii): synthesis, structure and spectroscopic characterization. NEW J CHEM 2018. [DOI: 10.1039/c7nj04790h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination diversity of an aromatic diamine with Rh(iii) is presented together with the elucidation of the molecular and electronic structures, electron transfer, and electronic transitions.
Collapse
Affiliation(s)
- Sima Roy
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Shuvam Pramanik
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Tapas Ghorui
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Soumitra Dinda
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Sarat Chandra Patra
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Kausikisankar Pramanik
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| |
Collapse
|
24
|
Mena I, García-Orduña P, Polo V, Lahoz FJ, Casado MA, Oro LA. Reactivity of the parent amido complexes of iridium with olefins: C-NH 2 bond formation versus C-H activation. Dalton Trans 2017; 46:11459-11468. [PMID: 28820211 DOI: 10.1039/c7dt01924f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report on the different chemical reactivity displayed by two mononuclear terminal amido compounds depending on the nature of the coordinated diene. Hence, treatment of amido-bridged iridium complexes [{Ir(μ-NH2)(tfbb)}3] (1; tfbb = tetrafluorobenzobarrelene) with dppp (dppp = bis(diphenylphosphane)propane) leads to the rupture of the amido bridges forming the mononuclear terminal amido compound [Ir(NH2)(dppp)(tfbb)] (3) in the first stage. On changing the reaction conditions, the formation of a C-NH2 bond between the amido moiety and the coordinated diene is observed and a new dinuclear complex [{Ir(1,2-η2-4-κ-C12H8F4N)(dppp)}2(μ-dppp)] (4) has been isolated. On the contrary, the diiridium amido-bridged complex [{Ir(μ-NH2)(cod)}2] (2; cod = 1,5-cyclooctadiene) in the presence of dppb (dppb = bis(diphenylphosphane)butane) allows the isolation of a mononuclear complex [Ir(1,2,3-η3-6-κ-C8H10)H(dppb)] (5), as a consequence of the extrusion of ammonia. The monitoring of the reaction of 2 with dppb (and dppp) allowed us to detect terminal amido complexes [Ir(NH2)(P-P)(cod)] (P-P = dppb (6), dppp (7)) in solution, as confirmed by an X-ray analysis of 7. Complex 7 was observed to evolve into hydrido species 5 at room temperature. DFT studies showed that C-H bond activation occurs through the deprotonation of one methylene fragment of the cod ligand by the highly basic terminal amido moiety instead of C-H oxidative addition to the Ir(i) center.
Collapse
Affiliation(s)
- Inmaculada Mena
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna, 12, 50009, Zaragoza, Spain.
| | | | | | | | | | | |
Collapse
|
25
|
Juribašić Kulcsár M, Halasz I, Budimir A, Užarević K, Lukin S, Monas A, Emmerling F, Plavec J, Ćurić M. Reversible Gas–Solid Ammonia N–H Bond Activation Mediated by an Organopalladium Complex. Inorg Chem 2017; 56:5342-5351. [DOI: 10.1021/acs.inorgchem.7b00422] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Marina Juribašić Kulcsár
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| | - Ivan Halasz
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| | - Ana Budimir
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića
1, HR−10000 Zagreb, Croatia
| | - Krunoslav Užarević
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| | - Stipe Lukin
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| | - Andrea Monas
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter Str. 11, 12489 Berlin, Germany
| | - Janez Plavec
- Slovenian NMR Center, National Institute of Chemistry, Hajdrihova
19, SI−1000 Ljubljana, Slovenia
| | - Manda Ćurić
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR−10000 Zagreb, Croatia
| |
Collapse
|
26
|
Pilar Betoré M, García‐Orduña P, Lahoz FJ, Casado MA, Polo V, Oro LA. C–N Bond Coupling Reactions of Ammonia with Acetone Promoted by Iridium and Rhodium Complexes: Experimental and DFT Studies. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. Pilar Betoré
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Pilar García‐Orduña
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Fernando J. Lahoz
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Miguel A. Casado
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Víctor Polo
- Departamento de Química Física e Instituto de Biocomputación y Física de Sistemas Complejos (BIFI) Universidad de Zaragoza Zaragoza Spain
| | - Luis A. Oro
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
- Centre of Research Excellence in Petroleum and Petrochemicals King Fahd University of Petroleum & Minerals 31261 Dhahran Saudi Arabia
| |
Collapse
|
27
|
Robinson TP, Lo SK, De Rosa D, Aldridge S, Goicoechea JM. On the Ambiphilic Reactivity of Geometrically Constrained Phosphorus(III) and Arsenic(III) Compounds: Insights into Their Interaction with Ionic Substrates. Chemistry 2016; 22:15712-15724. [PMID: 27628576 PMCID: PMC5095867 DOI: 10.1002/chem.201603135] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Indexed: 11/05/2022]
Abstract
The ambiphilic nature of geometrically constrained Group 15 complexes bearing the N,N‐bis(3,5‐di‐tert‐butyl‐2‐phenolate)amide pincer ligand (ONO3−) is explored. Despite their differing reactivity towards nucleophilic substrates with polarised element–hydrogen bonds (e.g., NH3), both the phosphorus(III), P(ONO) (1 a), and arsenic(III), As(ONO) (1 b), compounds exhibit similar reactivity towards charged nucleophiles and electrophiles. Reactions of 1 a and 1 b with KOtBu or KNPh2 afford anionic complexes in which the nucleophilic anion associates with the pnictogen centre ([(tBuO)Pn(ONO)]− (Pn=P (2 a), As (2 b)) and [(Ph2N)Pn(ONO)]− (Pn=P (3 a), As (3 b)). Compound 2 a can subsequently be reacted with a proton source or benzylbromide to afford the phosphorus(V) compounds (tBuO)HP(ONO) (4 a) and (tBuO)BzP(ONO) (5 a), respectively, whereas analogous arsenic(V) compounds are inaccessible. Electrophilic substrates, such as HOTf and MeOTf, preferentially associate with the nitrogen atom of the ligand backbone of both 1 a and 1 b, giving rise to cationic species that can be rationalised as either ammonium salts or as amine‐stabilised phosphenium or arsenium complexes ([Pn{ON(H)O}]+ (Pn=P (6 a), As (6 b)) and [Pn{ON(Me)O}]+ (Pn=P (7 a), As (7 b)). Reaction of 1 a with an acid bearing a nucleophilic counteranion (such as HCl) gives rise to a phosphorus(V) compound HPCl(ONO) (8 a), whereas the analogous reaction with 1 b results in the addition of HCl across one of the As−O bonds to afford ClAs{(H)ONO} (8 b). Functionalisation at both the pnictogen centre and the ligand backbone is also possible by reaction of 7 a/7 b with KOtBu, which affords the neutral species (tBuO)Pn{ON(Me)O} (Pn=P (9 a), As (9 b)). The ambiphilic reactivity of these geometrically constrained complexes allows some insight into the mechanism of reactivity of 1 a towards small molecules, such as ammonia and water.
Collapse
Affiliation(s)
- Thomas P Robinson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Siu-Kwan Lo
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Daniel De Rosa
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Simon Aldridge
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Jose M Goicoechea
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| |
Collapse
|
28
|
Betoré MP, Casado MA, García‐Orduña P, Lahoz FJ, Polo V, Oro LA. 2,5‐Norbornadiene C–C Coupling Reactions Mediated by Iridium Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600336] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Pilar Betoré
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Miguel A. Casado
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Pilar García‐Orduña
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Fernando J. Lahoz
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Víctor Polo
- Departamento de Química Física e Instituto de Biocomputación y Física de Sistemas Complejos (BIFI) Universidad de Zaragoza Zaragoza Spain
| | - Luis A. Oro
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH Departamento de Química Inorgánica Universidad de Zaragoza – CSIC C/Pedro Cerbuna, 12 50009 Zaragoza Spain
- Centre of Research Excellence in Petroleum and Petrochemicals King Fahd University of Petroleum & Minerals 31261 Dhahran Saudi Arabia
| |
Collapse
|
29
|
Betoré MP, Casado MA, García-Orduña P, Lahoz FJ, Polo V, Oro LA. Oxidative Addition of the N–H Bond of Ammonia to Iridium Bis(phosphane) Complexes: A Combined Experimental and Theoretical Study. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b01014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Pilar Betoré
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento
de Química Física and Instituto de Biocomputación
y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Luis A. Oro
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
- Center of Research Excellence in Petroleum Refining & Petrochemicals, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| |
Collapse
|
30
|
Wang L, Sun H, Li X. Imine Nitrogen Bridged Binuclear Nickel Complexes via N–H Bond Activation: Synthesis, Characterization, Unexpected C,N-Coupling Reaction, and Their Catalytic Application in Hydrosilylation of Aldehydes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00734] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Lin Wang
- School of Chemistry and Chemical
Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250199 Jinan, People’s Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical
Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250199 Jinan, People’s Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical
Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250199 Jinan, People’s Republic of China
| |
Collapse
|
31
|
Robinson TP, De Rosa DM, Aldridge S, Goicoechea JM. E-H Bond Activation of Ammonia and Water by a Geometrically Constrained Phosphorus(III) Compound. Angew Chem Int Ed Engl 2015; 54:13758-63. [PMID: 26404498 PMCID: PMC4648037 DOI: 10.1002/anie.201506998] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Indexed: 12/03/2022]
Abstract
The synthesis of a phosphorus(III) compound bearing a N,N-bis(3,5-di-tert-butyl-2-phenoxy)amide ligand is reported. This species has been found to react with ammonia and water, activating the E–H bonds in both substrates by formal oxidative addition to afford the corresponding phosphorus(V) compounds. In the case of water, both O–H bonds can be activated, splitting the molecule into its constituent elements. To our knowledge, this is the first example of a compound based on main group elements that sequentially activates water in this manner.
Collapse
Affiliation(s)
- Thomas P Robinson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA (UK)
| | - Daniel M De Rosa
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA (UK)
| | - Simon Aldridge
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA (UK).
| | - Jose M Goicoechea
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA (UK).
| |
Collapse
|
32
|
Robinson TP, De Rosa DM, Aldridge S, Goicoechea JM. E-H Bond Activation of Ammonia and Water by a Geometrically Constrained Phosphorus(III) Compound. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506998] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
33
|
Vélez E, Betoré MP, Casado MA, Polo V. N–H Activation of Ammonia by [{M(μ-OMe)(cod)}2] (M = Ir, Rh) Complexes: A DFT Study. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00419] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ederley Vélez
- Departamento
de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
| | - M. Pilar Betoré
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento
de Química Física and Instituto de Biocomputación
y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
| |
Collapse
|
34
|
Lahoz FJ, Pérez-Torrente JJ. In Honour of the 70th Birthday of Professor Luis A. Oro. ChemCatChem 2015. [DOI: 10.1002/cctc.201505050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
35
|
Romero RM, Fra L, Lishchynskyi A, Martínez C, Streuff J, Muñiz K. Amidato complexes of ruthenium, rhodium and iridium from concise N–H bond activation: exploration in catalysis. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
36
|
Brown RM, Borau Garcia J, Valjus J, Roberts CJ, Tuononen HM, Parvez M, Roesler R. Ammonia Activation by a Nickel NCN-Pincer Complex featuring a Non-Innocent N-Heterocyclic Carbene: Ammine and Amido Complexes in Equilibrium. Angew Chem Int Ed Engl 2015; 54:6274-7. [PMID: 25865317 DOI: 10.1002/anie.201500453] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Indexed: 01/06/2023]
Abstract
A Ni(0)-NCN pincer complex featuring a six-membered N-heterocyclic carbene (NHC) central platform and amidine pendant arms was synthesized by deprotonation of its Ni(II) precursor. It retained chloride in the square-planar coordination sphere of nickel and was expected to be highly susceptible to oxidative addition reactions. The Ni(0) complex rapidly activated ammonia at room temperature, in a ligand-assisted process where the carbene carbon atom played the unprecedented role of proton acceptor. For the first time, the coordinated (ammine) and activated (amido) species were observed together in solution, in a solvent-dependent equilibrium. A structural analysis of the Ni complexes provided insight into the highly unusual, non-innocent behavior of the NHC ligand.
Collapse
Affiliation(s)
- Rudy M Brown
- Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, Alberta, T2N1N4 (Canada)
| | - Javier Borau Garcia
- Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, Alberta, T2N1N4 (Canada).,Current address: Secure Energy Services Inc. Bow Valley Sq. 2 1900, 205 5th Ave SW, Calgary, Alberta, T2P2V7 (Canada)
| | - Juuso Valjus
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä (Finland)
| | - Christopher J Roberts
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä (Finland)
| | - Heikki M Tuononen
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä (Finland)
| | - Masood Parvez
- Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, Alberta, T2N1N4 (Canada)
| | - Roland Roesler
- Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, Alberta, T2N1N4 (Canada).
| |
Collapse
|
37
|
Brown RM, Borau Garcia J, Valjus J, Roberts CJ, Tuononen HM, Parvez M, Roesler R. Ammonia Activation by a Nickel NCN-Pincer Complex featuring a Non-Innocent N-Heterocyclic Carbene: Ammine and Amido Complexes in Equilibrium. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500453] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
38
|
Calvo B, Roy B, Macías R, Artigas MJ, Lahoz FJ, Oro LA. NH3-promoted ligand lability in eleven-vertex rhodathiaboranes. Inorg Chem 2014; 53:12428-36. [PMID: 25382790 DOI: 10.1021/ic501779n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The reaction of the 11-vertex rhodathiaborane, [8,8-(PPh3)2-nido-8,7-RhSB9H10] (1), with NH3 affords inmediately the adduct, [8,8,8-(NH3)(PPh3)2-nido-8,7-RhSB9H10] (4). The NH3-Rh interaction induces the labilization of the PPh3 ligands leading to the dissociation product, [8,8-(NH3)(PPh3)-nido-8,7-RhSB9H10] (5), which can then react with another molecule of NH3 to give [8,8,8-(NH3)2(PPh3)-nido-8,7-RhSB9H10] (6). These clusters have been characterized in situ by multielement NMR spectroscopy at different temeperatures. The variable temperature behavior of the system demonstrates that the intermediates 4-6 are in equilibrium, involving ligand exchange processes. On the basis of low intensity signals present in the (1)H NMR spectra of the reaction mixture, some species are tentatively proposed to be the bis- and tris-NH3 ligated clusters, [8,8-(NH3)2-nido-8,7-RhSB9H10] (7) and [8,8,8-(NH3)3-nido-8,7-RhSB9H10] (8). After evaporation of the solvent and the excess of NH3, the system containing species 4-8 regenerates the starting reactant, 1, thus closing a stoichiometric cycle of ammonia addition and loss. After 40 h at room temperature, the reaction of 1 with NH3 gives the hydridorhodathiaborane, [8,8,8-(H)(PPh3)2-nido-8,7-RhSB9H9] (2), as a single product. The reported rhodathiaboranes show reversible H3N-promoted ligand lability, which implies weak Rh-N interactions, leading to a rare case of metal complexes that circumvent "classical" Werner chemistry.
Collapse
Affiliation(s)
- Beatriz Calvo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC , 50009-Zaragoza, Spain
| | | | | | | | | | | |
Collapse
|
39
|
Cui J, Li Y, Ganguly R, Inthirarajah A, Hirao H, Kinjo R. Metal-free σ-bond metathesis in ammonia activation by a diazadiphosphapentalene. J Am Chem Soc 2014; 136:16764-7. [PMID: 25390290 DOI: 10.1021/ja509963m] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A diazadiphosphapentalene derivative 5 featuring a bent geometry with two phosphorus atoms at the bridgehead has been synthesized. Under mild conditions, compound 5 readily activated ammonia to afford 1-aza-2,3-diphospholene derivative 6 bearing an enamine group. The reaction is therefore viewed as a formal σ-bond metathesis between an N-H bond of ammonia and an endocyclic P-N bond of 5. Details of the reaction mechanism for ammonia activation as well as subsequent isomerization were explored by density functional theory calculations.
Collapse
Affiliation(s)
- Jingjing Cui
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University , Singapore 637371, Singapore
| | | | | | | | | | | |
Collapse
|
40
|
Azpíroz R, Rubio-Pérez L, Castarlenas R, Pérez-Torrente JJ, Oro LA. gem-Selective Cross-Dimerization and Cross-Trimerization of Alkynes with Silylacetylenes Promoted by a Rhodium-Pyridine-N-Heterocyclic Carbene Catalyst. ChemCatChem 2014. [DOI: 10.1002/cctc.201402327] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
41
|
Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. CNH2Bond Formation Mediated by Iridium Complexes. Angew Chem Int Ed Engl 2014; 53:9627-31. [DOI: 10.1002/anie.201405237] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/04/2014] [Indexed: 11/06/2022]
|
42
|
Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. CNH2Bond Formation Mediated by Iridium Complexes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405237] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
43
|
Jaseer E, Casado MA, Al-Saadi AA, Oro LA. Intermolecular hydroamination versus stereoregular polymerization of phenylacetylene by rhodium catalysts based on N–O bidentate ligands. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2013.11.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
44
|
Hansen K, Szilvási T, Blom B, Irran E, Driess M. A Donor-Stabilized Zwitterionic “Half-Parent” Phosphasilene and Its Unusual Reactivity towards Small Molecules. Chemistry 2014; 20:1947-56. [DOI: 10.1002/chem.201303906] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Indexed: 11/06/2022]
|
45
|
Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. P–H activation of secondary phosphanes on a parent amido diiridium complex. Dalton Trans 2014; 43:1609-19. [DOI: 10.1039/c3dt52911h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Palacios L, Artigas MJ, Polo V, Lahoz FJ, Castarlenas R, Pérez-Torrente JJ, Oro LA. Hydroxo–Rhodium–N-Heterocyclic Carbene Complexes as Efficient Catalyst Precursors for Alkyne Hydrothiolation. ACS Catal 2013. [DOI: 10.1021/cs400739y] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Laura Palacios
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Maria Jose Artigas
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Victor Polo
- Departamento
de Química Física − Instituto de Biocomputación
y Física de Sistemas complejos (BIFI), Universidad de Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Ricardo Castarlenas
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
- ARAID Foundation
| | - Jesús J. Pérez-Torrente
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Luis A. Oro
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
- Center for Refining & Petrochemicals, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| |
Collapse
|
47
|
Rubio-Pérez L, Azpíroz R, Di Giuseppe A, Polo V, Castarlenas R, Pérez-Torrente JJ, Oro LA. Pyridine-enhanced head-to-tail dimerization of terminal alkynes by a rhodium-N-heterocyclic-carbene catalyst. Chemistry 2013; 19:15304-14. [PMID: 24114872 DOI: 10.1002/chem.201302079] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Indexed: 11/11/2022]
Abstract
A general regioselective rhodium-catalyzed head-to-tail dimerization of terminal alkynes is presented. The presence of a pyridine ligand (py) in a Rh-N-heterocyclic-carbene (NHC) catalytic system not only dramatically switches the chemoselectivity from alkyne cyclotrimerization to dimerization but also enhances the catalytic activity. Several intermediates have been detected in the catalytic process, including the π-alkyne-coordinated Rh(I) species [RhCl(NHC)(η(2)-HC≡CCH2Ph)(py)] (3) and [RhCl(NHC){η(2)-C(tBu)≡C(E)CH=CHtBu}(py)] (4) and the Rh(III)-hydride-alkynyl species [RhClH{-C≡CSi(Me)3}(IPr)(py)2] (5). Computational DFT studies reveal an operational mechanism consisting of sequential alkyne C-H oxidative addition, alkyne insertion, and reductive elimination. A 2,1-hydrometalation of the alkyne is the more favorable pathway in accordance with a head-to-tail selectivity.
Collapse
Affiliation(s)
- Laura Rubio-Pérez
- Departamento Química Inorgánica, Instituto Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza (Spain)
| | | | | | | | | | | | | |
Collapse
|
48
|
Haehnel M, Yim JCH, Schafer LL, Rosenthal U. Facile Access to Tuneable Schwartz’s Reagents: Oxidative Addition Products from the Reaction of Amide NH Bonds with Reduced Zirconocene Complexes. Angew Chem Int Ed Engl 2013; 52:11415-9. [PMID: 24038845 DOI: 10.1002/anie.201305246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Martin Haehnel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock (Germany)
| | | | | | | |
Collapse
|
49
|
Haehnel M, Yim JCH, Schafer LL, Rosenthal U. Einfacher Zugang zu modifizierbarem Schwartz-Reagens - Oxidative Addition von amidischen N-H-Bindungen an reduzierte Zirconocenkomplexe. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
50
|
Chang YH, Nakajima Y, Tanaka H, Yoshizawa K, Ozawa F. Facile N-H bond cleavage of ammonia by an iridium complex bearing a noninnocent PNP-pincer type phosphaalkene ligand. J Am Chem Soc 2013; 135:11791-4. [PMID: 23895386 DOI: 10.1021/ja407163z] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A novel PNP-pincer type phosphaalkene complex of iridium bearing a dearomatized pyridine unit (3) has been prepared. Complex 3 rapidly reacts with ammonia at room temperature to afford a parent amido complex in high yield. DFT calculations indicate that the phosphaalkene unit with a strong π-accepting property effectively facilitates the N-H bond cleavage of ammonia via metal-ligand cooperation.
Collapse
Affiliation(s)
- Yung-Hung Chang
- International Research Center for Elements Science, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | | | | | | | | |
Collapse
|