1
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The kinetic substitution reactions and structural analysis of manganese(I) acetylacetonato complexes. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Jacobs FJF, Venter GJS, Fourie E, Kroon RE, Brink A. Substitution reactivity and structural variability induced by tryptamine on the biomimetic rhenium tricarbonyl complex. RSC Adv 2021; 11:24443-24455. [PMID: 35479015 PMCID: PMC9036643 DOI: 10.1039/d1ra03750a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/02/2021] [Indexed: 01/28/2023] Open
Abstract
A series of seven fac-[Re(CO)3(5Me-Sal-Trypt)(L)] complexes containing tryptamine on the N,O 5-methyl-salicylidene bidentate ligand backbone and where L is MeOH, Py, Imi, DMAP, PPh3 coordinated to the 6th position have been studied, including the formation of a dinuclear Re2 cluster. The crystallographic solid state structures show marked similarity in structural tendency, in particular the rigidity of the Re core and the hydrogen bond interactions similar to those found in protein structures. The rates of formation and stability of the complexes were evaluated by rapid time-resolved stopped-flow techniques and the methanol substitution reaction indicates the significant activation induced by the use of the N,O salicylidene bidentate ligand as manifested by the second-order rate constants for the entering nucleophiles. Both linear and limiting kinetics were observed and a systematic evaluation of the kinetics is reported clearly indicating an interchange type of intimate mechanism for the methanol substitution. The anticancer activity of compounds 1–7 was tested on HeLa cells and it was found that all compounds showed similar cytotoxicity where solubility allowed. IC50-values between ca. 11 and 22 μM indicate that some cytotoxicity resides most likely on the salicylidene–tryptamine ligand. The photoluminescence of the seven complexes is similar in maximum emission wavelength with little variation despite the broad range of ligands coordinated to the 6th position on the metal centre. The biomimetic tryptamine rhenium tricarbonyl complex shows rapid substitution reactivity on the 6th position as well as cytotoxicity and photoluminescence capability induced by the salicylidene bidentate ligand.![]()
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Affiliation(s)
| | | | - Eleanor Fourie
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Robin E. Kroon
- Department of Physics
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Alice Brink
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
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3
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Pordel S, Schrage BR, Ziegler CJ, White JK. Impact of steric bulk on photoinduced ligand exchange reactions in Mn(I) photoCORMs. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Amorim AL, Guerreiro A, Glitz VA, Coimbra DF, Bortoluzzi AJ, Caramori GF, Braga AL, Neves A, Bernardes GJL, Peralta RA. Synthesis, characterization and photoinduced CO-release by manganese( i) complexes. NEW J CHEM 2020. [DOI: 10.1039/d0nj02260h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Three new photoCORM, two with non two with nonbonding pyridine and one with benzyl group, were synthesised, and their CO-releasing properties evaluated for with regards to their elusive binding mode.
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Affiliation(s)
- André L. Amorim
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Ana Guerreiro
- Instituto de Medicina Molecular
- Faculdade de Medicina
- Universidade de Lisboa
- Avenida Professor Egas Moniz
- Lisboa
| | - Vinícius A. Glitz
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Daniel F. Coimbra
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | | | - Giovanni F. Caramori
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Antonio L. Braga
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Ademir Neves
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Gonçalo J. L. Bernardes
- Instituto de Medicina Molecular
- Faculdade de Medicina
- Universidade de Lisboa
- Avenida Professor Egas Moniz
- Lisboa
| | - Rosely A. Peralta
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
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5
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Pordel S, White JK. Impact of Mn(I) photoCORM ligand set on photochemical intermediate formation during visible light-activated CO release. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119206] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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6
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Schutte-Smith M, Roodt A, Alberto R, Twigge L, Visser HG, Kirsten L, Koen R. Structures of rhenium(I) complexes with 3-hydroxyflavone and benzhydroxamic acid as O,O'-bidentate ligands and confirmation of π-stacking by solid-state NMR spectroscopy. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:378-387. [PMID: 30957783 DOI: 10.1107/s2053229619002717] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 02/21/2019] [Indexed: 11/10/2022]
Abstract
The synthesis and crystal structures of two new rhenium(I) complexes obtained utilizing benzhydroxamic acid (BHAH) and 3-hydroxyflavone (2-phenylchromen-4-one, FlavH) as bidentate ligands, namely tetraethylammonium fac-(benzhydroxamato-κ2O,O')bromidotricarbonylrhenate(I), (C8H20N)[ReBr(C7H6NO2)(CO)3], 1, and fac-aquatricarbonyl(4-oxo-2-phenylchromen-3-olato-κ2O,O')rhenium(I)-3-hydroxyflavone (1/1), [Re(C15H9O3)(CO)3(H2O)]·C15H10O3, 3, are reported. Furthermore, the crystal structure of free 3-hydroxyflavone, C15H10O3, 4, was redetermined at 100 K in order to compare the packing trends and solid-state NMR spectroscopy with that of the solvate flavone molecule in 3. The compounds were characterized in solution by 1H and 13C NMR spectroscopy, and in the solid state by 13C NMR spectroscopy using the cross-polarization magic angle spinning (CP/MAS) technique. Compounds 1 and 3 both crystallize in the triclinic space group P-1 with one molecule in the asymmetric unit, while 4 crystallizes in the orthorhombic space group P212121. Molecules of 1 and 3 generate one-dimensional chains formed through intermolecular interactions. A comparison of the coordinated 3-hydroxyflavone ligand with the uncoordinated solvate molecule and free molecule 4 shows that the last two are virtually completely planar due to hydrogen-bonding interactions, as opposed to the former, which is able to rotate more freely. The differences between the solid- and solution-state 13C NMR spectra of 3 and 4 are ascribed to inter- and intramolecular interactions. The study also investigated the potential labelling of both bidentate ligands with the corresponding fac-99mTc-tricarbonyl synthon. All attempts were unsuccessful and reasons for this are provided.
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Affiliation(s)
- Marietjie Schutte-Smith
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Andreas Roodt
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Roger Alberto
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, Zürich CH-8057, Switzerland
| | - Linette Twigge
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Hendrik Gideon Visser
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Leo Kirsten
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Renier Koen
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
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7
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Tignor SE, Kuo HY, Lee TS, Scholes GD, Bocarsly AB. Manganese-Based Catalysts with Varying Ligand Substituents for the Electrochemical Reduction of CO2 to CO. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00554] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven E. Tignor
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Hsin-Ya Kuo
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Tia S. Lee
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Gregory D. Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Andrew B. Bocarsly
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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8
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Manicum ALE, Schutte-Smith M, Visser HG. The synthesis and structural comparison of fac-[Re(CO)3]+ containing complexes with altered β-diketone and phosphine ligands. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.01.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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9
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Mai S, Plasser F, Dorn J, Fumanal M, Daniel C, González L. Quantitative wave function analysis for excited states of transition metal complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.01.019] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Shi C, Wang Z, Chen Y, Zhang X, Zhao Y, Tao Y, Wu H. Structural diversity of four coordination polymers based on 5-nitro-1,2,3-benzenetricarboxylic acid (H3nbta): Solvothermal syntheses, structural characterizations and properties. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.05.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Schutte-Smith M, Eselem Bungu PS, Steyl G, Roodt A. Crystal structure of 3,5,7-tris(morpholinomethyl)tropolone·0.67 hydrate, C 22H 33N 3O 5·0.67H 2O. Z KRIST-NEW CRYST ST 2016. [DOI: 10.1515/ncrs-2016-0083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C22H33N3O5·0.67H2O, monoclinic, P21/c, a = 11.9915(6) Å, b = 18.9934(10) Å, c = 10.5332(5) Å, β = 112.155(2)°, V = 2221.91(19) Å3, Z = 4, R
gt(F) = 0.0417, wR
ref(F
2) = 0.1139, T = 100(2) K.
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Affiliation(s)
- Marietjie Schutte-Smith
- Department of Chemistry , University of the Free State , P.O. Box 339, Bloemfontein 9301, South Africa
| | | | - Gideon Steyl
- Department of Chemistry , University of the Free State , Bloemfontein 9301, South Africa
| | - Andreas Roodt
- Department of Chemistry , University of the Free State , Bloemfontein 9301, South Africa
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12
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Crystal structure of fac-hexacarbonylbisμ2-(3-carboxy-3′-carboxylato-2,2′-bipyridine)-κ3N,N′:O-dirhenium(I) tetrahydrate, C30H22N4O18Re2. Z KRIST-NEW CRYST ST 2016. [DOI: 10.1515/ncrs-2013-8010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC30H22N4O18Re2, monoclinic, P21/c (no. 14), a = 10.167(7) Å, b = 17.57(1) Å, c = 19.95(1) Å, β = 98.75(1)°, V = 3522(9) Å3, Z = 4, Rgt(F) = 0.0275, wRref(F2) = 0.0633, T = 100(2) K.
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13
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Mokolokolo PP, Brink A, Visser HG. Crystal structure of bis(μ 2-2-((3-methylphenyl)imino)methylphenolato-κ 2
N, O: O)hexacarbonyldimanganese(I), C 34H 24Mn 2N 2O 8. Z KRIST-NEW CRYST ST 2016. [DOI: 10.1515/ncrs-2015-0210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C34H24Mn2N2O8, triclinic, P1̅ (no. 2) a = 7.737(5) Å, b = 9.483(5) Å, c = 11.309(5) Å, β = 102.514(5)°, V = 766.6(7) Å3, Z = 1, R
gt
(F) = 0.0478, wR
ref
(F
2
) = 0.1297, T = 100(2) K
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Affiliation(s)
- Pennie P. Mokolokolo
- Department of Chemistry, University of the Free State, Nelson Mandela ave, Bloemfontein, South Africa
| | - Alice Brink
- Department of Chemistry, University of the Free State, Nelson Mandela ave, Bloemfontein, South Africa
| | - Hendrik G. Visser
- Department of Chemistry, University of the Free State, Nelson Mandela ave, Bloemfontein, South Africa
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14
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Marake DT, Mokolokolo PP, Visser HG, Brink A. Structural comparison of group 7 tricarbonyl complexes of 2-{[2-(1H-imidazol-4-yl)ethyl]iminomethyl}-5-methylphenolate. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2015; 71:423-9. [PMID: 26044320 DOI: 10.1107/s2053229615008360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 04/28/2015] [Indexed: 11/10/2022]
Abstract
Two tricarbonyl complexes of rhenium(I) and manganese(I) coordinated by the ligand 2-{[2-(1H-imidazol-4-yl)ethyl]iminomethyl}-5-methylphenolate are reported, viz. fac-tricarbonyl(2-{[2-(1H-imidazol-4-yl-κN(3))ethyl]iminomethyl-κN}-5-methylphenolato-κO)rhenium(I) methanol monosolvate, [Re(C16H14N3O4)(CO)3]·CH3OH, (I), and fac-tricarbonyl(2-{[2-(1H-imidazol-4-yl-κN(3))ethyl]iminomethyl-κN}-5-methylphenolato-κO)manganese(I), fac-[Mn(C16H14N3O4)(CO)3], (II), display facial coordination in a distorted octahedral environment. The crystal structure of (I) is stabilized by O-H···O, N-H···O and C-H···O hydrogen-bond interactions, while that of (II) is stabilized by N-H...O hydrogen-bond interactions only. These interactions result in two-dimensional networks and π-π stacking for both structures.
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Affiliation(s)
- Daniel T Marake
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
| | - Penny P Mokolokolo
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
| | - Hendrik G Visser
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
| | - Alice Brink
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
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