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Ballico M, Alessi D, Aneggi E, Busato M, Zuccaccia D, Allegri L, Damante G, Jandl C, Baratta W. Cyclometalated and NNN Terpyridine Ruthenium Photocatalysts and Their Cytotoxic Activity. Molecules 2024; 29:2146. [PMID: 38731639 PMCID: PMC11085208 DOI: 10.3390/molecules29092146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/16/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
The cyclometalated terpyridine complexes [Ru(η2-OAc)(NC-tpy)(PP)] (PP = dppb 1, (R,R)-Skewphos 4, (S,S)-Skewphos 5) are easily obtained from the acetate derivatives [Ru(η2-OAc)2(PP)] (PP = dppb, (R,R)-Skewphos 2, (S,S)-Skewphos 3) and tpy in methanol by elimination of AcOH. The precursors 2, 3 are prepared from [Ru(η2-OAc)2(PPh3)2] and Skewphos in cyclohexane. Conversely, the NNN complexes [Ru(η1-OAc)(NNN-tpy)(PP)]OAc (PP = (R,R)-Skewphos 6, (S,S)-Skewphos 7) are synthesized in a one pot reaction from [Ru(η2-OAc)2(PPh3)2], PP and tpy in methanol. The neutral NC-tpy 1, 4, 5 and cationic NNN-tpy 6, 7 complexes catalyze the transfer hydrogenation of acetophenone (S/C = 1000) in 2-propanol with NaOiPr under light irradiation at 30 °C. Formation of (S)-1-phenylethanol has been observed with 4, 6 in a MeOH/iPrOH mixture, whereas the R-enantiomer is obtained with 5, 7 (50-52% ee). The tpy complexes show cytotoxic activity against the anaplastic thyroid cancer 8505C and SW1736 cell lines (ED50 = 0.31-8.53 µM), with the cationic 7 displaying an ED50 of 0.31 µM, four times lower compared to the enantiomer 6.
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Affiliation(s)
- Maurizio Ballico
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Dario Alessi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Eleonora Aneggi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Marta Busato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Lorenzo Allegri
- Dipartimento di Medicina, Istituto di Genetica Medica, Università di Udine, Via Chiusaforte, F3, I-33100 Udine, Italy; (L.A.); (G.D.)
| | - Giuseppe Damante
- Dipartimento di Medicina, Istituto di Genetica Medica, Università di Udine, Via Chiusaforte, F3, I-33100 Udine, Italy; (L.A.); (G.D.)
| | - Christian Jandl
- Department of Chemistry & Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str. 1, 85748 Garching bei München, Germany;
| | - Walter Baratta
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
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2
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Zucca A, Pilo MI. Rollover Cyclometalation as a Valuable Tool for Regioselective C-H Bond Activation and Functionalization. Molecules 2021; 26:E328. [PMID: 33435257 PMCID: PMC7827749 DOI: 10.3390/molecules26020328] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 01/31/2023] Open
Abstract
Rollover cyclometalation constitutes a particular case of cyclometallation reaction. This reaction occurs when a chelated heterocyclic ligand loses its bidentate coordination mode and undergoes an internal rotation, after which a remote C-H bond is regioselectively activated, affording an uncommon cyclometalated complex, called "rollover cyclometalated complex". The key of the process is the internal rotation of the ligand, which occurs before the C-H bond activation and releases from coordination a donor atom. The new "rollover" ligand has peculiar properties, being a ligand with multiple personalities, no more a spectator in the reactivity of the complex. The main reason of this peculiarity is the presence of an uncoordinated donor atom (the one initially involved in the chelation), able to promote a series of reactions not available for classic cyclometalated complexes. The rollover reaction is highly regioselective, because the activated C-H bond is usually in a symmetric position with respect to the donor atom which detaches from the metal stating the rollover process. Due to this novel behavior, a series of potential applications have appeared in the literature, in fields such as catalysis, organic synthesis, and advanced materials.
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Affiliation(s)
- Antonio Zucca
- Department of Chemistry and Pharmacy, University of Sassari, via Vienna 2, 07100 Sassari, Italy;
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3
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Cancela L, Esteruelas MA, López AM, Oliván M, Oñate E, San-Torcuato A, Vélez A. Osmium- and Iridium-Promoted C–H Bond Activation of 2,2′-Bipyridines and Related Heterocycles: Kinetic and Thermodynamic Preferences. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00156] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Lara Cancela
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ainhoa San-Torcuato
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Andrea Vélez
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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4
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Bocian A, Brykczyńska D, Kubicki M, Hnatejko Z, Wałęsa-Chorab M, Gorczyński A, Patroniak V. Complexation behavior of 6,6″-dimethyl-2,2′:6′,2″-terpyridine ligand with Co(II), Au(III), Ag(I), Zn(II) and Cd(II) ions: Synthesis, spectroscopic characterization and unusual structural motifs. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.09.073] [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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5
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Leist M, Kerner C, Ghoochany LT, Farsadpour S, Fizia A, Neu JP, Schön F, Sun Y, Oelkers B, Lang J, Menges F, Niedner-Schatteburg G, Salih KS, Thiel WR. Roll-over cyclometalation: A versatile tool to enhance the catalytic activity of transition metal complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.03.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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More hydra than Janus – Non-classical coordination modes in complexes of oligopyridine ligands. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Zucker SP, Wossidlo F, Weber M, Lentz D, Tzschucke CC. Palladium-Catalyzed Directed Halogenation of Bipyridine N-Oxides. J Org Chem 2017; 82:5616-5635. [PMID: 28537077 DOI: 10.1021/acs.joc.7b00444] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The palladium-catalyzed directed C-H halogenation of bipyridine N-oxides was investigated. Using NCS or NBS (N-chloro- or N-bromosuccinimide) and 5 mol % Pd(OAc)2 in chlorobenzene (0.10 molar) at 110 °C, pyridine-directed functionalization took place and 3-chloro- or 3-bromobipyridine N-oxides were obtained in high yields. The reaction is sensitive to steric hindrance by 4- and 6'-substituents. Only in the latter case, where coordination of palladium by the pyridine is hindered, 3'-halogenation directed by the N-oxide function was observed. The halogenated products were deoxygenated by PCl3 or PBr3.
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Affiliation(s)
- Sina P Zucker
- Freie Universität Berlin , Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin, Germany
| | - Friedrich Wossidlo
- Freie Universität Berlin , Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin, Germany
| | - Manuela Weber
- Freie Universität Berlin , Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin, Germany
| | - Dieter Lentz
- Freie Universität Berlin , Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin, Germany
| | - C Christoph Tzschucke
- Freie Universität Berlin , Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin, Germany
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8
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Hong SY, Kwak J, Chang S. Rhodium-catalyzed selective CH functionalization of NNN tridentate chelating compounds via a rollover pathway. Chem Commun (Camb) 2016; 52:3159-62. [PMID: 26805059 DOI: 10.1039/c5cc09960a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reported herein is the first example of the Rh(NHC)-catalyzed selective bis C-H alkylation of NNN tridentate chelating compounds in reaction with alkenes. The observed excellent site-selectivity can readily be explained by the postulated rollover pathway in the C-H bond activation step. The reaction is highly facile affording bis-alkylated tridentate products in high yields over a broad range of versatile heteroarene substrates and alkene reactants including ethylene gas, thus enabling its applications to be feasible in coordination and synthetic chemistry.
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Affiliation(s)
- Seung Youn Hong
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Jaesung Kwak
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea and Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea.
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea and Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea.
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9
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10
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Stoccoro S, Maidich L, Ruiu T, Cinellu MA, Clarkson GJ, Zucca A. Chiral cyclometalation of 6-(1-phenylbenzyl)-2,2'-bipyridine. Dalton Trans 2015; 44:18001-11. [PMID: 26407175 DOI: 10.1039/c5dt02483h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new bipyridine ligand, 6-(1-phenylbenzyl)-2,2'-bipyridine, has been prepared by a multistep synthesis starting from the corresponding substituted pyridine. The coordinating properties of the new ligand have been tested with two d(8) metal ions, Pt(ii) and Pd(ii), to give the cyclometalated complexes [Pt(N,N,C)Cl] and [Pd(N,N,C)Cl], where N,N,C is a terdentate deprotonated bipyridine containing a new stereogenic carbon atom directly generated by C-H bond activation. The single-crystal of the platinum complex has been solved by X-ray diffraction. DFT calculations confirm the presence of a PtH interaction that stabilizes one of the two possible conformers by 14.7 kJ mol(-1) for Pt and 12.9 kJ mol(-1) for Pd. The energy barrier to pass from one conformer to the other is 25.4 and 23.8 kJ mol(-1) respectively. Under different reaction conditions, regioselective activation of a pyridine C-H bond gave the less common cyclometalated rollover complex [Pt(L-H)Me(DMSO)], which was isolated and characterised.
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Affiliation(s)
- Sergio Stoccoro
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100 Sassari, Italy.
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11
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Alam P, Kaur G, Chakraborty S, Roy Choudhury A, Laskar IR. "Aggregation induced phosphorescence" active "rollover" iridium(III) complex as a multi-stimuli-responsive luminescence material. Dalton Trans 2015; 44:6581-92. [PMID: 25757518 DOI: 10.1039/c4dt03424d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
On reaction of 2,2'-bipyridine with iridium(iii), an "aggregation induced phosphorescence (AIP)" active "rollover" complex, [Ir(PPh3)2(bipy-H)(Cl)(H)] (bipy-H = κ(2)-N,C-2,2'-bipyridine) or [Ir(bipy-H)], is obtained. The emission colour changes from bluish-green to yellowish-orange and vice versa after repeated protonation and deprotonation of [Ir(bipy-H)], respectively, which unequivocally supports its reversible nature. [Ir(bipy-H)] is sensitive to acids with different pKa values. Tuning of the emission properties can be achieved in the presence of acids with different pKas. This behaviour allows the complex, [Ir(bipy-H)], to function as a phosphorescent acid sensor in both solution and the solid state, as well as a chemosensor for detecting acidic and basic organic vapours. The protonated form, [Ir(bipy-H)H(+)], which is generated after protonation of [Ir(bipy-H)] can be used as a solvatochromic probe for oxygen containing solvents, and also shows vapochromic properties. The emission, absorption and (1)H NMR spectra of [Ir(bipy-H)] under acidic and basic conditions demonstrate its reversible nature. DFT based calculations suggest that changes in the electron affinity of the pyridinyl rings are responsible for all these processes.
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Affiliation(s)
- Parvej Alam
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan, India.
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12
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Nasser N, Boyle PD, Puddephatt RJ. Quadruple cyclometalation of a diphosphine-dicarboxamide ligand at platinum(II). J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Cocco F, Zucca A, Stoccoro S, Serratrice M, Guerri A, Cinellu MA. Synthesis and Characterization of Palladium(II) and Platinum(II) Adducts and Cyclometalated Complexes of 6,6′-Dimethoxy-2,2′-bipyridine: C(sp3)–H and C(sp2)–H Bond Activations. Organometallics 2014. [DOI: 10.1021/om5003057] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fabio Cocco
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, CIRC, Via Vienna 2, I-07100 Sassari, Italy
| | - Antonio Zucca
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, CIRC, Via Vienna 2, I-07100 Sassari, Italy
| | - Sergio Stoccoro
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, CIRC, Via Vienna 2, I-07100 Sassari, Italy
| | - Maria Serratrice
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, CIRC, Via Vienna 2, I-07100 Sassari, Italy
| | - Annalisa Guerri
- Dipartimento
di Chimica, Università di Firenze, Via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Maria A. Cinellu
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, CIRC, Via Vienna 2, I-07100 Sassari, Italy
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Zucca A, Cordeschi D, Maidich L, Pilo MI, Masolo E, Stoccoro S, Cinellu MA, Galli S. Rollover cyclometalation with 2-(2'-pyridyl)quinoline. Inorg Chem 2013; 52:7717-31. [PMID: 23768142 DOI: 10.1021/ic400908f] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Rollover cyclometalation of 2-(2'-pyridyl)quinoline, L, allowed the synthesis of the family of complexes [Pt(L-H)(X)(L')] and [Pt(L*)(X)(L')][BF4] (X = Me, Cl; L' = neutral ligand), the former being the first examples of Pt(II) rollover complexes derived from the ligand L. The ligand L* is a C,N cyclometalated, N-protonated isomer of L, and can also be described as an abnormal-remote pyridylene. The corresponding [Pt(L-H)(Me)(L')]/[Pt(L*)(Me)(L')](+) complexes constitute an uncommon Brønsted-Lowry acid-base conjugated couple. The species obtained were investigated in depth through NMR and UV-vis spectroscopy, cyclic voltammetry, and density functional theory (DFT) methods to correlate different chemico-physical properties with the nature of the cyclometalated ligand (e.g., L vs bipy or L* vs L) and of the neutral ligand (DMSO, CO, PPh3). The crystal structures of [Pt(L-H)(Me)(PPh3)], [Pt(L-H)(Me)(CO)] and [Pt(L*)(Me)(CO)][BF4] were determined by X-ray powder diffraction methods, the latter being the first structure of a Pt(II)-based, protonated, rollover complex to be unraveled. The isomerization of [Pt(L*)(Me)(PPh3)](+) in solution proceeds through a retro-rollover process to give the corresponding adduct [Pt(L)(Me)(PPh3)](+), where L acts as a classical N,N chelating ligand. Notably, the retro-rollover reaction is the first process, among the plethora of Pt-C bond protonolysis reactions reported in the literature, where a Pt-C(heteroaryl) bond is cleaved rather than a Pt-C(alkyl) one.
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Affiliation(s)
- Antonio Zucca
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100 Sassari, Italy.
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Tronnier A, Strassner T. (C^C*) Cyclometalated binuclear N-heterocyclic biscarbene platinum(II) complexes--highly emissive phosphorescent emitters. Dalton Trans 2013; 42:9847-51. [PMID: 23689316 DOI: 10.1039/c3dt50841b] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of bimetallic N-heterocyclic carbene (NHC) platinum(II) complexes with the general formula [Pt(NHC)(L)]2Ph were synthesized, which are composed of two [Pt(NHC)(L)] (L = acetylacetone, dipivaloylmethane or dimesitoylmethane; NHC = 3-methylimidazole or 3-benzylimidazole) fragments. Both fragments are cyclometalated to the same central phenyl ring in the para- or meta-position. All complexes have been fully characterized by standard techniques, two of them additionally by solid-state structures. Photoluminescence properties were investigated and very high quantum yields of 76-93% at room temperature have been observed. For a single-matrix device with an emitter concentration of 30%, a current efficiency of 25 cd A(-1), an external quantum efficiency of 8.5%, and a luminance efficiency of 10 lm W(-1) were achieved at 300 cd m(-2). Density functional theory (DFT) calculations were performed to support experimental data and gain further insight into the photoluminescence behaviour.
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Affiliation(s)
- Alexander Tronnier
- Physical Organic Chemistry, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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Maidich L, Zuri G, Stoccoro S, Cinellu MA, Masia M, Zucca A. Mesoionic Complexes of Platinum(II) Derived from “Rollover” Cyclometalation: A Delicate Balance between Pt–C(sp3) and Pt–C(sp2) Bond Cleavage as a Result of Different Reaction Conditions. Organometallics 2013. [DOI: 10.1021/om300824d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Luca Maidich
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Giuseppina Zuri
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Sergio Stoccoro
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Maria Agostina Cinellu
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Marco Masia
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Antonio Zucca
- Dipartimento di Chimica
e Farmacia, Università di Sassari, via Vienna 2, 07100 Sassari, Italy
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Petretto GL, Rourke JP, Maidich L, Stoccoro S, Cinellu MA, Minghetti G, Clarkson GJ, Zucca A. Heterobimetallic Rollover Derivatives. Organometallics 2012. [DOI: 10.1021/om200660a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Giacomo L. Petretto
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | | | - Luca Maidich
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
| | - Sergio Stoccoro
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
| | - Maria Agostina Cinellu
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
| | - Giovanni Minghetti
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
| | - Guy J. Clarkson
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Antonio Zucca
- Dipartimento
di Chimica e Farmacia, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy
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18
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Butschke B, Schwarz H. “Rollover” cyclometalation – early history, recent developments, mechanistic insights and application aspects. Chem Sci 2012. [DOI: 10.1039/c1sc00651g] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Zucca A, Petretto GL, Stoccoro S, Cinellu MA, Manassero M, Manassero C, Minghetti G. Cyclometalation of 2,2′-Bipyridine. Mono- and Dinuclear C,N Platinum(II) Derivatives. Organometallics 2009. [DOI: 10.1021/om801033g] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonio Zucca
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Giacomo Luigi Petretto
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Sergio Stoccoro
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Maria Agostina Cinellu
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Mario Manassero
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Carlo Manassero
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
| | - Giovanni Minghetti
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, Via Venezian 21, I-20133 Milano, Italy
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Zhao JW, Wang CM, Zhang J, Zheng ST, Yang GY. Combination of lacunary polyoxometalates and high-nuclear transition metal clusters under hydrothermal conditions: IX. a series of novel polyoxotungstates sandwiched by octa-copper clusters. Chemistry 2008; 14:9223-39. [PMID: 18720497 DOI: 10.1002/chem.200800856] [Citation(s) in RCA: 165] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The reaction of CuCl(2).2 H2O with trivacant Keggin polyoxoanions K8Na2[A-alpha-GeW9O34].25 H2O or K10[A-alpha-SiW9O34].25 H2O in the presence of 1,2-diaminopropane (dap), ethylenediamine (en) or 2,2'-bipyridine (2,2'-bpy) under hydrothermal conditions afforded five novel hybrid inorganic-organic octa-Cu sandwiched polyoxotungstates (POTs): H4[CuII8(dap)4(H2O)2(B-alpha-GeW9O34)2].13 H2O (1), (H2en)2[CuII8-(en)4(H2O)2(B-alpha-GeW9O34)2].5 H2O(2), (H2en)2[CuII8(en)4(H2O)2(B-alpha-SiW9-O34)2].8 H2O (3), [CuII(H2O)2]H2[CuII8-(en)4(H2O)2(B-alpha-SiW9O34)2] (4), and [CuII2(H2O)2(2,2'-bpy)2]{[CuII(bdyl)]2-[CuII8(2,2'-bpy)4(H2O)2(B-alpha-GeW9-O34)2]}.4 H2O (bdyl=2,2'-bipyridinyl)(5). Additionally, CuCl(2).2 H2O reacts with the mixture of GeO2, Na2WO(4).2 H2O, H2SiW12O(40).2 H2O in the presence of 2,2'-bpy and 4,4'-bpy under hydrothermal conditions leading to another novel mixed-valent octa-Cu sandwiched POT hybrid: [CuI(2,2'-bpy)(4,4'-bpy)]2[{CuI2(2,2'-bpy)2(4,4'-bpy)]2[CuI2CuII6(2,2'-bpy)2(4,4'-bpy)2(B-alpha-GeW9O34)2}].2 H2O (6). 1, 2, and 3 are discrete dimers constructed from two trivacant Keggin [B-alpha-XW9O34]10- (X=GeIV/SiIV) fragments and an octa-Cu cluster whereas 4 displays the 3D (3,6)-connected nets with (4.6(2))(4(2).6(4).8(7).10(2)) topology, which are built by octa-Cu sandwiched polyoxometalate building blocks through copper cation bridges. 5 is a novel 2D layer based on octa-Cu sandwiched POT clusters and [CuII2(bdyl)] units. Interestingly, the rollover metalation of 2,2'-bpy is firstly observed in the system containing the copper complex under hydrothermal conditions. 6 is a discrete mixed-valent octa-Cu sandwiched POT supported by two CuI-complexes [CuI2-(2,2'-bpy)2(4,4'-bpy)]2+ through 4,4'-bpy bridges, which constructs a novel dodeca-copper cluster. Notably, the octa-Cu cluster in 6 is mixed-valent and is different from those in 1-5. To our knowledge, 1-6 represent a rare family of POTs incorporating novel octa-nuclear transition-metal clusters in polyoxometalate chemistry. They were structurally characterized by FT-IR spectra, elemental analysis, thermogravimetric analysis, and single-crystal X-ray diffraction. The magnetic properties of 1, 4, and 5 were quantitatively analyzed by the MAGPACK software package.
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Affiliation(s)
- Jun-Wei Zhao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter and Graduate School of the Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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Willison SA, Krause JA, Connick WB. Platinum(II) Molecular Triangle with a Deep Intramolecular Cavity. Inorg Chem 2008; 47:1258-60. [DOI: 10.1021/ic7020066] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stuart A. Willison
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172
| | - William B. Connick
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172
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Anderson C, Crespo M, Morris J, Tanski JM. Reactivity of cyclometallated platinum complexes with chiral ligands. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.09.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Stoccoro S, Zucca A, Petretto GL, Cinellu MA, Minghetti G, Manassero M. Dinuclear platinum(II) complexes with bridging twofold deprotonated 2,2′:6′,2″-terpyridine. New molecules with a 3,5-diplatinated-pyridyl inner core: [Pt2(terpy-2H)(Me)2(L)2], [Pt2(terpy-2H)(X)2(L)2] and [Pt2(terpy-2H)(H)2(L)2] (L=neutral ligand; X=halide) – Crystal and molecular structure of [Pt2(terpy-2H)(Cl)2(PPh3)2]. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.06.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Zucca A, Cinellu M, Minghetti G, Stoccoro S, Manassero M. Dinuclear, Tricyclometallated Platinum(II) Derivatives ? Substitution Reactions and Reactivity of the Platinum?Carbon Bonds. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400371] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gracia C, Marco G, Navarro R, Romero P, Soler T, Urriolabeitia EP. C−P and C−H Bond Activations and C−C Coupling in Bis-Phosphonium Salts Induced by Platinum(II) Complexes. Organometallics 2003. [DOI: 10.1021/om0305465] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cecilia Gracia
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Gema Marco
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Rafael Navarro
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Pilar Romero
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Tatiana Soler
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Esteban P. Urriolabeitia
- Departamento de Química Inorgánica and Servicio de Resonancia Magnética Nuclear, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
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Minghetti G, Stoccoro S, Cinellu MA, Soro B, Zucca A. Activation of a C−H Bond in a Pyridine Ring. Reaction of 6-Substituted 2,2‘-Bipyridines with Methyl and Phenyl Platinum(II) Derivatives: N‘,C(3)-“Rollover” Cyclometalation. Organometallics 2003. [DOI: 10.1021/om0301583] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Minghetti
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Sergio Stoccoro
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | | | - Barbara Soro
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Antonio Zucca
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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Minghetti G, Doppiu A, Stoccoro S, Zucca A, Cinellu M, Manassero M, Sansoni M. Reactivity of Ph2P(O)py-2 with Platinum(II) Alkyl Derivatives − Building-up of a Chiral Phosphorus Atom through C,N-Cyclometallation. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(20022)2002:2<431::aid-ejic431>3.0.co;2-k] [Citation(s) in RCA: 15] [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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Zucca A, Doppiu A, Cinellu MA, Stoccoro S, Minghetti G, Manassero M. Multiple C−H Bond Activation. Threefold-Deprotonated 6-Phenyl-2,2‘-bipyridine as a Bridging Ligand in Dinuclear Platinum(II) Derivatives. Organometallics 2002. [DOI: 10.1021/om010913h] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonio Zucca
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
| | - Angelino Doppiu
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
| | - Maria Agostina Cinellu
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
| | - Sergio Stoccoro
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
| | - Giovanni Minghetti
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
| | - Mario Manassero
- Dipartimento di Chimica, Università di Sassari, via Vienna 2, I-07100 Sassari, Italy, and Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Centro CNR, via Venezian 21, I-20133 Milano, Italy
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Formation and cleavage of platinacycles containing a fluorinated imine. Crystal structure of [PtMe(3,4,5-C6HF3CHNCH2C6H5)PPh3]. Polyhedron 2002. [DOI: 10.1016/s0277-5387(01)00971-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Slater JW, Lydon DP, Alcock NW, Rourke JP. Doubly Cyclometalated Pyridazines: Contrasting Behavior with Palladium and Platinum. Organometallics 2001. [DOI: 10.1021/om010449g] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Donocadh P. Lydon
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
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