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Revisiting O–O Bond Formation through Outer‐Sphere Water Molecules versus Bimolecular Mechanisms in Water‐Oxidation Catalysis (WOC) by Cp*Ir Based Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Duran J, Polo A, Real J, Benet-Buchholz J, Solà M, Poater A. Structural Preferences in Phosphanylthiolato Platinum(II) Complexes. ChemistryOpen 2016; 5:51-9. [PMID: 27308212 PMCID: PMC4906482 DOI: 10.1002/open.201500136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 11/12/2022] Open
Abstract
The transition‐metal complexes of heterotopic phosphanylthiolato ligands are useful in various reactions which depend on the stereochemistry of the complexes. Bis‐chelate complex [Pt(SCH2CH2PPh2‐κ2P,S)2] (1) was obtained in good yields by direct base‐free substitution reaction of the corresponding phosphanylthiol (HSCH2CH2PPh2) with K2PtCl4 or by oxidative addition of the same phosphanylthiol to Pt(PPh3)4. In agreement with the antisymbiosis rule, complex 1 shows a cis‐P,P arrangement in solid state crystallizing in the monoclinic system (C2/c). Density functional theory (DFT) calculations on 1 reveal the right characteristics for the preferred cis‐P,P arrangement, rationalizing its formation. Direct base‐free reaction of [PtCl2(1,5‐cyclooctadiene)] with one equivalent of the same phosphanylthiol produce the trinuclear complex [PtCl(μ‐SCH2CH2PPh2‐κ2P,S)]3 (2) instead of the binuclear structure common in palladium and nickel derivatives. Crystals of 2 are triclinic (P1‾
) showing a sulfur‐bridging edge‐sharing cyclic trinuclear complex with square‐planar coordination geometry around the platinum atoms and a Pt3S3 cycle in skew‐boat conformation. This preference for the trinuclear structure was rationalized mechanistically and through conceptual DFT.
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Affiliation(s)
- Josep Duran
- Departament de Química Universitat de Girona Campus de Montilivi s/n 17071 Girona Spain
| | - Alfonso Polo
- Departament de Química Universitat de Girona Campus de Montilivi s/n 17071 Girona Spain
| | - Julio Real
- Departament de Quıímica Universitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Jordi Benet-Buchholz
- Institute of Chemical Research of Catalonia ICIQ) Av. Països Catalans 16 43007 Tarragona Spain
| | - Miquel Solà
- Departament de Química Universitat de Girona Campus de Montilivi s/n17071 Girona Spain; Institut de Quıímica Computational i Catàlisi Universitat de Girona Campus de Montilivi s/n 17071 Girona Spain
| | - Albert Poater
- Departament de Química Universitat de Girona Campus de Montilivi s/n17071 Girona Spain; Institut de Quıímica Computational i Catàlisi Universitat de Girona Campus de Montilivi s/n 17071 Girona Spain
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Poater A. Versatile deprotonated NHC: C,N-bridged dinuclear iridium and rhodium complexes. Beilstein J Org Chem 2016; 12:117-24. [PMID: 26877814 PMCID: PMC4734348 DOI: 10.3762/bjoc.12.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 01/08/2016] [Indexed: 11/30/2022] Open
Abstract
Bearing the versatility of N-heterocyclic carbene (NHC) ligands, here density functional theory (DFT) calculations unravel the capacity of coordination of a deprotonated NHC ligand (pNHC) to generate a doubly C2,N3-bridged dinuclear complex. Here, in particular the discussion is based on the combination of the deprotonated 1-arylimidazol (aryl = mesityl (Mes)) with [M(cod)(μ-Cl)] (M = Ir, Rh) generated two geometrical isomers of complex [M(cod){µ-C3H2N2(Mes)-κC2,κN3}]2). The latter two isomers display conformations head-to-head (H-H) and head-to-tail (H-T) of CS and C2 symmetry, respectively. The isomerization from the H-H to the H-T conformation is feasible, whereas next substitutions of the cod ligand by CO first, and PMe3 later confirm the H-T coordination as the thermodynamically preferred. It is envisaged the exchange of the metal, from iridium to rhodium, confirming here the innocence of the nature of the metal for such arrangements of the bridging ligands.
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Affiliation(s)
- Albert Poater
- Institut de Química Computacional i Catàlisi, Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
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Ghorui T, Roy S, Pramanik S, Pramanik K. RhCl(PPh3)3-mediated C–H oxyfunctionalization of pyrrolido-functionalized bisazoaromatic pincers: a combined experimental and theoretical scrutiny of redox-active and spectroscopic properties. Dalton Trans 2016; 45:5720-9. [DOI: 10.1039/c5dt05044h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-trivial coordination mode of symmetrical NNN ligands with Rh(iii) leads to redox-active NNO-scaffolds via C(sp2)–H oxyfunctionalization at rt, opening an opportunity to juxtapose different redox-active domains.
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Affiliation(s)
- Tapas Ghorui
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - 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
| | - Kausikisankar Pramanik
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
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Poater A, Falivene L, Urbina-Blanco CA, Manzini S, Nolan SP, Cavallo L. How does the addition of steric hindrance to a typical N-heterocyclic carbene ligand affect catalytic activity in olefin metathesis? Dalton Trans 2014; 42:7433-9. [PMID: 23455458 DOI: 10.1039/c3dt32980a] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Density functional theory (DFT) calculations were used to predict and rationalize the effect of the modification of the structure of the prototype 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) N-heterocyclic carbene (NHC) ligand. The modification consists in the substitution of the methyl groups of ortho isopropyl substituent with phenyl groups, and here we plan to describe how such significant changes affect the metal environment and therefore the related catalytic behaviour. Bearing in mind that there is a significant structural difference between both ligands in different olefin metathesis reactions, here by means of DFT we characterize where the NHC ligand plays a more active role and where it is a simple spectator, or at least its modification does not significantly change its catalytic role/performance.
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Affiliation(s)
- Albert Poater
- Institut de Química Computacional, Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Catalonia, Spain.
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Poater A, Solà M. Complete σ* intramolecular aromatic hydroxylation mechanism through O2 activation by a Schiff base macrocyclic dicopper(I) complex. Beilstein J Org Chem 2013; 9:585-93. [PMID: 23616799 PMCID: PMC3628990 DOI: 10.3762/bjoc.9.63] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 03/01/2013] [Indexed: 02/05/2023] Open
Abstract
In this work we analyze the whole molecular mechanism for intramolecular aromatic hydroxylation through O2 activation by a Schiff hexaazamacrocyclic dicopper(I) complex, [Cu(I) 2(bsH2m)](2+). Assisted by DFT calculations, we unravel the reaction pathway for the overall intramolecular aromatic hydroxylation, i.e., from the initial O2 reaction with the dicopper(I) species to first form a Cu(I)Cu(II)-superoxo species, the subsequent reaction with the second Cu(I) center to form a μ-η(2):η(2)-peroxo-Cu(II) 2 intermediate, the concerted peroxide O-O bond cleavage and C-O bond formation, followed finally by a proton transfer to an alpha aromatic carbon that immediately yields the product [Cu(II) 2(bsH2m-O)(μ-OH)](2+).
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Affiliation(s)
- Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain ; Catalan Institute for Water Research (ICRA), H2O Building, Scientific and Technological Park of the University of Girona, Emili Grahit 101, E-17003 Girona, Spain
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Dancing multiplicity states supported by a carboxylated group in dicopper structures bonded to O2. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1336-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Poater A, Credendino R, Slugovc C, Cavallo L. Exploring new generations of ruthenium olefin metathesis catalysts: the reactivity of a bis-ylidene ruthenium complex by DFT. Dalton Trans 2013; 42:7271-5. [DOI: 10.1039/c3dt32884h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Albert Poater
- Institut de Química Computacional, Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Catalonia, Spain.
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Bantreil X, Poater A, Urbina-Blanco CA, Bidal YD, Falivene L, Randall RAM, Cavallo L, Slawin AMZ, Cazin CSJ. Synthesis and Reactivity of Ruthenium Phosphite Indenylidene Complexes. Organometallics 2012. [DOI: 10.1021/om300703p] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Xavier Bantreil
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Albert Poater
- Institut de Quı́mica
Computacional, Departament de Quı́mica, Universitat de Girona, Campus de Montilivi,
E-17071 Girona, Spain
| | | | - Yannick D. Bidal
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Laura Falivene
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano
(SA), Italy
| | | | - Luigi Cavallo
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano
(SA), Italy
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Serrano I, López MI, Ferrer Í, Poater A, Parella T, Fontrodona X, Solà M, Llobet A, Rodríguez M, Romero I. New Ru(II) Complexes Containing Oxazoline Ligands As Epoxidation Catalysts. Influence of the Substituents on the Catalytic Performance. Inorg Chem 2011; 50:6044-54. [PMID: 21650155 DOI: 10.1021/ic200053f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Isabel Serrano
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - M. Isabel López
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Íngrid Ferrer
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Albert Poater
- Catalan Institute for Water Research (ICRA), H2O Building, Scientific and Technological Park of the University of Girona, Emili Grahit 101, E-17003 Girona, Spain
| | - Teodor Parella
- Departament de Química and Servei de RMN, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Xavier Fontrodona
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Miquel Solà
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Antoni Llobet
- Departament de Química and Servei de RMN, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain
| | - Montserrat Rodríguez
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Isabel Romero
- Departament de Química, Serveis Tècnics de Recerca and Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
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Poater A, Ragone F, Garrido M, Pérez S, Poch M, Correa A, Cavallo L. Deactivation of Ru-benzylidene Grubbs catalysts active in olefin metathesis. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.procs.2011.04.131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Utz D, Kisslinger S, Heinemann FW, Hampel F, Schindler S. Syntheses, Characterization and Properties of Open-Chain Copper(I) Complexes. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000954] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Poater A, Gallegos Saliner A, Solà M, Cavallo L, Worth AP. Computational methods to predict the reactivity of nanoparticles through structure-property relationships. Expert Opin Drug Deliv 2010; 7:295-305. [PMID: 20201736 DOI: 10.1517/17425240903508756] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD Innovative biomedical techniques operational at the nanoscale level are being developed in therapeutics, including advanced drug delivery systems and targeted nanotherapy. Given the large number of nanoparticles that are being developed for possible biomedical use, the use of computational methods in the assessment of their properties is of key importance. AREAS COVERED IN THIS REVIEW Among the in silico methods, quantum mechanics is still used rarely in the study of nanostructured particles. This review provides an overview of some of the main quantum mechanics methods that are already used in the assessment of chemicals. Furthermore, classical tools used in the chemistry field are described, to show their potential also in the pharmacological field. WHAT THE READER WILL GAIN The current status of computational methods in terms of availability and applicability to nanoparticles, and recommendations for further research are highlighted. TAKE HOME MESSAGE The in silico modelling of nanoparticles can assist in targeting and filling gaps in knowledge on the effects of these particular particles. Computational models of the behaviour of nanoparticles in biological systems, including simulation models for predicting intermolecular interactions and harmful side effects, can be highly valuable in screening candidate particles for potential biomedical use in diagnostics, imaging and drug delivery.
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Affiliation(s)
- Albert Poater
- Institut Català de Recerca de l'Aigua (ICRA), Parc Científic i Tecnològic de la Universitat de Girona, Emili Grahit 101, Girona, Spain.
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