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Pyridinesilver Tetraoxometallate Complexes: Overview of the Synthesis, Structure, and Properties of Pyridine Complexed AgXO4 (X = Cl, Mn, Re) Compounds. INORGANICS 2021. [DOI: 10.3390/inorganics9110079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We reviewed the synthesis, structure, and properties of pyridine complexes of AgXO4 (X = Cl, Mn, and Re) compounds with various compositions ([AgPy2] XO4, [AgPy2XO4]·0.5Py, [AgPy4] XO4, and 4 [AgPy2XO4] [AgPy4] XO4). We also clarified the controversial information about the existence and composition of pyridine complexes of silver permanganate, used widely as mild and selective oxidants in organic chemistry. We discussed in detail the available structural and spectroscopic (IR, Raman, and UV) data and thermal behavior, including the existence and consequence of quasi-intramolecular reactions between the reducing ligand and anions containing oxygen.
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Kovács GB, May NV, Bombicz PA, Klébert S, Németh P, Menyhárd A, Novodárszki G, Petrusevski V, Franguelli FP, Magyari J, Béres K, Szilágyi IM, Kótai L. An unknown component of a selective and mild oxidant: structure and oxidative ability of a double salt-type complex having κ 1O-coordinated permanganate anions and three- and four-fold coordinated silver cations. RSC Adv 2019; 9:28387-28398. [PMID: 35529631 PMCID: PMC9071043 DOI: 10.1039/c9ra03230d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 08/21/2019] [Indexed: 12/30/2022] Open
Abstract
Compounds containing redox active permanganate anions and complexed silver cations with reducing pyridine ligands are used not only as selective and mild oxidants in organic chemistry but as precursors for nanocatalyst synthesis in low-temperature solid-phase quasi-intramolecular redox reactions. Here we show a novel compound (4Agpy2MnO4·Agpy4MnO4) that has unique structural features including (1) four coordinated and one non-coordinated permanganate anion, (2) κ1O-permanganate coordinated Ag, (3) chain-like [Ag(py)2]+ units, (4) non-coordinated ionic permanganate ions and an [Ag(py)4]+ tetrahedra as well as (5) unsymmetrical hydrogen bonds between pyridine α-CHs and a permanganate oxygen. As a result of the oxidizing permanganate anion and reducing pyridine ligand, a highly exothermic reaction occurs at 85 °C. If the decomposition heat is absorbed by alumina or oxidation-resistant organic solvents (the solvent absorbs the heat to evaporate), the decomposition reaction proceeds smoothly and safely. During heating of the solid material, pyridine is partly oxidized into carbon dioxide and water; the solid phase decomposition end product contains mainly metallic Ag, Mn3O4 and some encapsulated carbon dioxide. Surprisingly, the enigmatic carbon-dioxide is an intercalated gas instead of the expected chemisorbed carbonate form. The title compound is proved to be a mild and efficient oxidant toward benzyl alcohols with an almost quantitative yield of benzaldehydes.
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Affiliation(s)
- Gréta Bettina Kovács
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary .,Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics Műegyetem Rakpart 3 Budapest H-1111 Hungary
| | - Nóra V May
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Petra Alexandra Bombicz
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Szilvia Klébert
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Péter Németh
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Alfréd Menyhárd
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics Budapest Hungary
| | - Gyula Novodárszki
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Vladimir Petrusevski
- Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University Skopje Republic of Macedonia
| | - Fernanda Paiva Franguelli
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - József Magyari
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad Trg Dositeja Obradovića 3 Novi Sad 21000 Serbia
| | - Kende Béres
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics Műegyetem Rakpart 3 Budapest H-1111 Hungary
| | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary .,Deuton-X Ltd. Selmeci u. 89 Érd H-2030 Hungary
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Sajó IE, Bakos LP, Szilágyi IM, Lendvay G, Magyari J, Mohai M, Szegedi Á, Farkas A, Jánosity A, Klébert S, Kótai L. Unexpected Sequential NH 3/H 2O Solid/Gas Phase Ligand Exchange and Quasi-Intramolecular Self-Protonation Yield [NH 4Cu(OH)MoO 4], a Photocatalyst Misidentified before as (NH 4) 2Cu(MoO 4) 2. Inorg Chem 2018; 57:13679-13692. [PMID: 30351069 DOI: 10.1021/acs.inorgchem.8b02261] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[NH4Cu(OH)MoO4] as active photocatalyst in the decomposition of Congo Red when irradiated by UV or visible light has been prepared in an unusual ammonia/water ligand exchange reaction of [tetraamminecopper(II)] molybdate, [Cu(NH3)4]MoO4. [Cu(NH3)4]MoO4 was subjected to moisture of open air at room temperature. Light blue orthorhombic [Cu(NH3)(H2O)3]MoO4 was formed in 2 days as a result of an unexpected solid/gas phase ammonia-water ligand exchange reaction. This complex does not lose its last ammonia ligand on further standing in open air; however, a slow quasi-intramolecular (self)-protonation reaction takes place in 2-4 weeks, producing a yellowish-green microcrystalline material, which has been identified as a new compound, [NH4Cu(OH)MoO4], ( a = 10,5306 Å, b = 6.0871 Å, c = 8.0148 Å, β = 64,153°, C2, Z = 4). Mechanisms are proposed for both the sequential ligand exchange and the self-protonation reactions supported by ab initio quantum-chemical calculations and deuteration experiments as well. The [Cu(NH3)(H2O)3]MoO4 intermediate transforms into NH4Cu(OH)(H2O)2MoO4, which loses two waters and yields [NH4Cu(OH)MoO4]. Upon heating, both [Cu(NH3)4]MoO4 and [Cu(NH3)(H2O)3]MoO4 decompose, losing three NH3 and three H2O ligands, respectively, and stable [Cu(NH3)MoO4] is formed from both. The latter can partially be hydrated in boiling water into [NH4Cu(OH)MoO4. This compound can also be prepared in pure form by boiling the saturated aqueous solution of [Cu(NH3)4]MoO4. All properties of [NH4Cu(OH)MoO4] match those of the active photocatalyst described earlier in the literature under the formulas (NH4)2[Cu(MoO4)2] and (NH4)2Cu4(NH3)3Mo5O20.
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Affiliation(s)
- István E Sajó
- University of Pécs , János Szentágothai Research Centre , Pécs , H-7624 , Hungary
| | - László P Bakos
- Budapest University of Technology and Economics , Department of Inorganic and Analytical Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - Imre M Szilágyi
- Budapest University of Technology and Economics , Department of Inorganic and Analytical Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - György Lendvay
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - József Magyari
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences , University of Novi Sad , Trg Dositeja Obradovića 3 , Novi Sad , 21000 , Serbia
| | - Miklós Mohai
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Ágnes Szegedi
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Attila Farkas
- Budapest University of Technology and Economics , Department of Organic Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - Anna Jánosity
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Szilvia Klébert
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - László Kótai
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary.,Deuton-X Ltd. , H-2030 , Érd , Selmeci u. 89, Hungary
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Sajó IE, Kovács GB, Pasinszki T, Bombicz PA, May Z, Szilágyi IM, Jánosity A, Banerji KK, Kant R, Kótai L. The chemical identity of “[Ag(py)2]MnO4” organic solvent soluble oxidizing agent and new synthetic routes for the preparation of [Ag(py)n]XO4 (X = Mn, Cl, and Re, n = 2–4) complexes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1493464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- István E. Sajó
- János Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Gréta B. Kovács
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tibor Pasinszki
- Department of Chemistry, Faculty of Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu, Suva, Fiji Islands
| | - Petra A. Bombicz
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Zoltán May
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Imre M. Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Anna Jánosity
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | | | - Rajni Kant
- Department of Physics, X-ray Crystallography Laboratory, University of Jammu, Jammu-Tawi, India
| | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Deuton-X Ltd., Érd, Hungary
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