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Ag 2O versus Cu 2O in the Catalytic Isomerization of Coordinated Diaminocarbenes to Formamidines: A Theoretical Study. MATERIALS 2022; 15:ma15020491. [PMID: 35057208 PMCID: PMC8778719 DOI: 10.3390/ma15020491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 11/17/2022]
Abstract
DFT theoretical calculations for the Ag2O-induced isomerization process of diaminocarbenes to formamidines, coordinated to Mn(I), have been carried out. The reaction mechanism found involves metalation of an N-H residue of the carbene ligand by the catalyst Ag2O and the formation of a key transition state showing a μ-η2:η2 coordination of the formamidinyl ligand between manganese and silver, which allows a translocation process of Mn(I) and silver(I) ions between the carbene carbon atom and the nitrogen atom, before the formation of the formamidine ligand is completed. Calculations carried out using Cu2O as a catalyst instead of Ag2O show a similar reaction mechanism that is thermodynamically possible, but highly unfavorable kinetically and very unlikely to be observed, which fully agrees with experimental results.
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2
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Schotten C, Bourne RA, Kapur N, Nguyen BN, Willans CE. Electrochemical Generation of
N
‐Heterocyclic Carbenes for Use in Synthesis and Catalysis. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100264] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | - Richard A. Bourne
- School of Chemical and Process Engineering University of Leeds Leeds LS2 9JT UK
| | - Nikil Kapur
- School of Mechanical Engineering University of Leeds Leeds LS2 9JT UK
| | - Bao N. Nguyen
- School of Chemistry University of Leeds Leeds LS2 9JT UK
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3
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Wagner HK, Wadepohl H, Ballmann J. A 2,2'-diphosphinotolane as a versatile precursor for the synthesis of P-ylidic mesoionic carbenes via reversible C-P bond formation. Chem Sci 2021; 12:3693-3701. [PMID: 34163643 PMCID: PMC8179451 DOI: 10.1039/d0sc06128j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/22/2021] [Indexed: 01/18/2023] Open
Abstract
A metal-templated synthetic route to cyclic (aryl)(ylidic) mesoionic carbenes (CArY-MICs) featuring an endocyclic P-ylide is presented. This approach, which requires metal templates with two cis-positioned open coordination sites, is based on the controlled cyclisation of a P,P'-diisopropyl-substituted 2,2'-diphosphinotolane (1) and leads to chelate complexes coordinated by a phosphine donor and the CArY-MIC carbon atom. The C-P bond formation involved in the former partial cyclisation of 1 proceeds under mild conditions and was shown to be applicable all over the d-block. In the presence of a third fac-positioned open coordination site, the P-C bond formation was found to be reversible, as shown for a series of molybdenum complexes. DFT modelling studies are in line with an interpretation of the target compounds as CArY-MICs.
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Affiliation(s)
- Hannah K Wagner
- Anorganisch-Chemisches Institut, Universität Heidelberg Im Neuenheimer Feld 276 D-69120 Heidelberg Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg Im Neuenheimer Feld 276 D-69120 Heidelberg Germany
| | - Joachim Ballmann
- Anorganisch-Chemisches Institut, Universität Heidelberg Im Neuenheimer Feld 276 D-69120 Heidelberg Germany
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4
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Ghosh B, Phukan AK. Probing the potential of metalla-N-heterocyclic carbenes towards activation of enthalpically strong bonds. Dalton Trans 2020; 49:9505-9515. [PMID: 32608419 DOI: 10.1039/d0dt01363c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Density functional theory calculations are employed to explore the reactivity of metalla-N-heterocyclic carbenes (MNHCs) towards activation of a variety of small molecules (H2, NH3, PH3, SiH3Ph and CH4). All the MNHCs considered are found to have a stable singlet ground state and possess suitable electronic properties for their application in small molecule activation. The calculated energy barriers of E-H (E = H, C, N, Si, P) activation for the MNHCs are found to be in agreement with those of the experimentally evaluated cyclic alkyl(amino)carbene (CAAC) and diamidocarbenes (DACs), thereby indicating the activating effect of the incorporation of an ancillary metal center within a cyclic NHC, and highlighting a new, underexplored strategy in achieving difficult bond activations with carbenes.
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Affiliation(s)
- Bijoy Ghosh
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
| | - Ashwini K Phukan
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
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5
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6
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Rohman SS, Ghosh B, Phukan AK. In search of stable singlet metalla-N-heterocyclic carbenes (MNHCs): a contribution from theory. Dalton Trans 2019; 48:11772-11780. [PMID: 31298233 DOI: 10.1039/c9dt02388g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical studies predict that the stability of the singlet state of metalla-N-heterocyclic carbenes (MNHCs) is strongly influenced not only by the substituents at the α-nitrogen atoms and the nature of ligands at the transition metal center but also by the substituents at the carbenic backbone. All the MNHCs were found to have a stable singlet ground state and the computed ΔES-T values for some of the MNHCs were found to be significantly large and lie within the range of experimentally known carbenes (31.0-84.0 kcal mol-1). Furthermore, they were found to have superior σ-donation ability to conventional NHCs. The calculated proton affinities, gallium pyramidalization, pKa and nucleophilicity index values for the MNHCs were found to be in good agreement with their calculated electron donation ability.
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Affiliation(s)
| | - Bijoy Ghosh
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
| | - Ashwini K Phukan
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
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7
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Ruiz J, Sol D, García L, Mateo MA, Vivanco M, Van der Maelen JF. Generation and Tunable Cyclization of Formamidinate Ligands in Carbonyl Complexes of Mn(I): An Experimental and Theoretical Study. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00898] [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]
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8
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Kinzhalov MA, Eremina AA, Smirnov AS, Suslonov VV, Kukushkin VY, Luzyanin KV. Cleavage of acyclic diaminocarbene ligands at an iridium(iii) center. Recognition of a new reactivity mode for carbene ligands. Dalton Trans 2019; 48:7571-7582. [DOI: 10.1039/c9dt01138b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new reactivity mode for acyclic diaminocarbene ligands, viz. competitive cleavage of either C–NH2 or C–NHR bonds in the aminocarbene fragment, is recognized.
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Affiliation(s)
| | | | | | | | | | - Konstantin V. Luzyanin
- Saint Petersburg State University
- Saint Petersburg
- Russian Federation
- Department of Chemistry
- University of Liverpool
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9
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Singh C, Prakasham AP, Gangwar MK, Ghosh P. Binuclear Fused 5-membered Palladacycle and Palladium Complex of Amido-Functionalized N-heterocyclic Carbene Precatalysts for the One-Pot Tandem Hiyama Alkynylation/Cyclization Reactions. ChemistrySelect 2018. [DOI: 10.1002/slct.201801667] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chandan Singh
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - A. P. Prakasham
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - Manoj Kumar Gangwar
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - Prasenjit Ghosh
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
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10
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Ruiz J, Sol D, Mateo MA, Vivanco M. Selective formation of formamidines, carbodiimides and formimidates from isocyanide complexes of Mn(i) mediated by Ag2O. Dalton Trans 2018; 47:6279-6282. [DOI: 10.1039/c8dt01200h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The easily accessible cation [Mn(bipy)(CO)3]+ induces transformations of isocyanides into a variety of organic functionalities with the mediation of Ag2O.
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Affiliation(s)
- Javier Ruiz
- Departamento de Química Orgánica e Inorgánica
- Facultad de Química
- Universidad de Oviedo
- 33006 Oviedo
- Spain
| | - Daniel Sol
- Departamento de Química Orgánica e Inorgánica
- Facultad de Química
- Universidad de Oviedo
- 33006 Oviedo
- Spain
| | - María A. Mateo
- Departamento de Química Orgánica e Inorgánica
- Facultad de Química
- Universidad de Oviedo
- 33006 Oviedo
- Spain
| | - Marilín Vivanco
- Departamento de Química Orgánica e Inorgánica
- Facultad de Química
- Universidad de Oviedo
- 33006 Oviedo
- Spain
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11
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Katkova SA, Kinzhalov MA, Tolstoy PM, Novikov AS, Boyarskiy VP, Ananyan AY, Gushchin PV, Haukka M, Zolotarev AA, Ivanov AY, Zlotsky SS, Kukushkin VY. Diversity of Isomerization Patterns and Protolytic Forms in Aminocarbene PdII and PtII Complexes Formed upon Addition of N,N′-Diphenylguanidine to Metal-Activated Isocyanides. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00569] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Svetlana A. Katkova
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Peter M. Tolstoy
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Alexander S. Novikov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Vadim P. Boyarskiy
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Anastasiia Yu. Ananyan
- Institute of Macromolecular Compounds of Russian Academy of Sciences, Bolshoii Pr. 31, 199004 Saint Petersburg, Russian Federation
| | - Pavel V. Gushchin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Matti Haukka
- Department
of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Andrey A. Zolotarev
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Alexander Yu. Ivanov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
| | - Semen S. Zlotsky
- Ufa State Petroleum Technological University, Kosmonavtov 1, 420062 Ufa, Bashkortostan, Russian Federation
| | - Vadim Yu. Kukushkin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
- Institute of Macromolecular Compounds of Russian Academy of Sciences, Bolshoii Pr. 31, 199004 Saint Petersburg, Russian Federation
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12
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Ruiz J, García L, Vivanco M, Sol D, García-Granda S. Half-sandwich iron(ii) complexes with protic acyclic diaminocarbene ligands: synthesis, deprotonation and metalation reactions. Dalton Trans 2017; 46:10387-10398. [PMID: 28745355 DOI: 10.1039/c7dt02049j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A variety of half-sandwich iron(ii) complexes with diprotic acyclic diaminocarbene ligands (pADCs) have been obtained by reaction of the cationic complexes [Fe(Cp)(CO)2(CNR)]+ and [Fe(Cp)(CO)(CNR)2]+ with methylamine, and their acid-base behaviour was studied, revealing an easy reversible deprotonation reaction of both N-H moieties of the carbene ligands. The deprotonation process is frequently followed by a nucleophilic attack of the nitrogen atom on a vicinal carbonyl or isocyanide ligand, affording the corresponding metallacycles. Metalation of one or two N-H groups of the pADC ligands can be accomplished by reaction of the carbene complexes with either [AuCl(PPh3)] or [Ru(p-cym)Cl2]2 in the presence of KOH or LiHMDS as deprotonating agents. A number of Fe(ii)/Au(i) and Fe(ii)/Ru(ii) heterometallic complexes have been prepared in this way, some of them formally containing unique metalla-N-heterocyclic carbene ligands.
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Affiliation(s)
- Javier Ruiz
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Spain.
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13
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Ruiz J, Sol D, Van der Maelen JF, Vivanco M. Base-Promoted Transmetalation Reactions of Protic N-Heterocyclic Carbenes and Acyclic Diamino Carbenes from MnI to AuI: A Mechanistic Study. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Javier Ruiz
- Departamento de Química Orgánica e
Inorgánica and ‡Departamento
de Química Física y Analítica, Facultad
de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
| | - Daniel Sol
- Departamento de Química Orgánica e
Inorgánica and ‡Departamento
de Química Física y Analítica, Facultad
de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
| | - Juan F. Van der Maelen
- Departamento de Química Orgánica e
Inorgánica and ‡Departamento
de Química Física y Analítica, Facultad
de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
| | - Marilín Vivanco
- Departamento de Química Orgánica e
Inorgánica and ‡Departamento
de Química Física y Analítica, Facultad
de Química, Universidad de Oviedo, E-33006 Oviedo, Spain
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14
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Anisimova TB, Kinzhalov MA, Kuznetsov ML, Guedes da Silva MFC, Zolotarev AA, Kukushkin VY, Pombeiro AJL, Luzyanin KV. 1,3-Dipolar Cycloaddition of Nitrones to Gold(III)-Bound Isocyanides. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00635] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tatyana B. Anisimova
- Centro
de Química Estrutural, Instituto Supérior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Maxim L. Kuznetsov
- Centro
de Química Estrutural, Instituto Supérior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - M. Fátima C. Guedes da Silva
- Centro
de Química Estrutural, Instituto Supérior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Andrey A. Zolotarev
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Vadim Yu. Kukushkin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Armando J. L. Pombeiro
- Centro
de Química Estrutural, Instituto Supérior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Konstantin V. Luzyanin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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16
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Kong L, Ganguly R, Li Y, Kinjo R. Serendipitous Observation of AlI
Insertion into a C−O Bond in L2
PhB (L=Oxazol-2-ylidene). Chemistry 2016; 22:1922-1925. [PMID: 26743893 DOI: 10.1002/chem.201504537] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Lingbing Kong
- Division of Chemistry and Biological Chemistry (CBC); School of Physical and Mathematical Sciences; Nanyang Technological University (NTU); Nanyang Link 21 Singapore 637371 Singapore
| | - Rakesh Ganguly
- NTU-CBC Crystallography Facility; Nanyang Technological University; Singapore
| | - Yongxin Li
- NTU-CBC Crystallography Facility; Nanyang Technological University; Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry (CBC); School of Physical and Mathematical Sciences; Nanyang Technological University (NTU); Nanyang Link 21 Singapore 637371 Singapore
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