1
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Bimetallic Fe–Ir and Trimetallic Fe–Ir–Au Carbonyl Clusters Containing Hydride and/or Phosphine Ligands: Syntheses, Structures and DFT Studies. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01839-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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2
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Shieh M, Liu YH, Wang CC, Jian SH, Lin CN, Chen YM, Huang CY. A comparative study on NHC-functionalized ternary Se/Te–Fe–Cu compounds: synthesis, catalysis, and the effect of chalcogens. NEW J CHEM 2019. [DOI: 10.1039/c9nj02051a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel family of highly efficient Se–Fe–Cu–NHC catalysts was synthesized, which were suitable models for the study of the chalcogen effect.
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Affiliation(s)
- Minghuey Shieh
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Yu-Hsin Liu
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chih-Chin Wang
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Si-Huan Jian
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chien-Nan Lin
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Yen-Ming Chen
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chung-Yi Huang
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
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3
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Functionalized NHC-incorporated Te−Fe−Cu clusters: Facile synthesis, electrochemistry, and catalytic reaction. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.10.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Capacci C, Ciabatti I, Femoni C, Iapalucci MC, Funaioli T, Zacchini S, Zanotti V. Molecular Nickel Phosphide Carbonyl Nanoclusters: Synthesis, Structure, and Electrochemistry of [Ni 11P(CO) 18] 3- and [H 6-nNi 31P 4(CO) 39] n- (n = 4 and 5). Inorg Chem 2018; 57:1136-1147. [PMID: 29303559 DOI: 10.1021/acs.inorgchem.7b02598] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of [NEt4]2[Ni6(CO)12] in thf with 0.5 equiv of PCl3 affords the monophosphide [Ni11P(CO)18]3- that in turn further reacts with PCl3 resulting in the tetra-phosphide carbonyl cluster [HNi31P4(CO)39]5-. Alternatively, the latter can be obtained from the reaction of [NEt4]2[Ni6(CO)12] in thf with 0.8-0.9 equiv of PCl3. The [HNi31P4(CO)39]5- penta-anion is reversibly protonated by strong acids leading to the [H2Ni31P4(CO)39]4- tetra-anion, whereas deprotonation affords the [Ni31P4(CO)39]6- hexa-anion. The latter is reduced with Na/naphthalene yielding the [Ni31P4(CO)39]7- hepta-anion. In order to shed light on the polyhydride nature and redox behavior of these clusters, electrochemical and spectroelectrochemical studies were carried out on [Ni11P(CO)18]3-, [HNi31P4(CO)39]5-, and [H2Ni31P4(CO)39]4-. The reversible formation of the stable [Ni11P(CO)18]4- tetra-anion is demonstrated through the spectroelectrochemical investigation of [Ni11P(CO)18]3-. The redox changes of [HNi31P4(CO)39]5- show features of chemical reversibility and the vibrational spectra in the νCO region of the nine redox states of the cluster [HNi31P4(CO)39]n- (n = 3-11) are reported. The spectroelectrochemical investigation of [H2Ni31P4(CO)39]4- revealed the presence of three chemically reversible reduction processes, and the IR spectra of [H2Ni31P4(CO)39]n- (n = 4-7) have been recorded. The different spectroelectrochemical behavior of [HNi31P4(CO)39]5- and [H2Ni31P4(CO)39]4- support their formulations as polyhydrides. Unfortunately, all the attempts to directly confirm their poly hydrido nature by 1H NMR spectroscopy failed, as previously found for related large metal carbonyl clusters. Thus, the presence and number of hydride ligands have been based on the observed protonation/deprotonation reactions and the spectroelectrochemical experiments. The molecular structures of the new clusters have been determined by single-crystal X-ray analysis. These represent the first examples of structurally characterized molecular nickel carbonyl nanoclusters containing interstitial phosphide atoms.
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Affiliation(s)
- Chiara Capacci
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Iacopo Ciabatti
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Cristina Femoni
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Maria Carmela Iapalucci
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Tiziana Funaioli
- Dipartimento di Chimica e Chimica Industriale, University of Pisa , Via Moruzzi 13, 56124 Pisa, Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Valerio Zanotti
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna , Viale Risorgimento 4, I-40136 Bologna, Italy
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5
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Bortoluzzi M, Ceriotti A, Cesari C, Ciabatti I, Della Pergola R, Femoni C, Iapalucci MC, Storione A, Zacchini S. Syntheses of [Pt6
(CO)8
(SnCl2
)(SnCl3
)4
]4-
and [Pt6
(CO)8
(SnCl2
)(SnCl3
)2
(PPh3
)2
]2-
Platinum-Carbonyl Clusters Decorated by SnII
Fragments. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600597] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marco Bortoluzzi
- Dipartimento di Scienze Molecolari e Nanosistemi; Ca' Foscari University of Venice; Via Torino 155 30175 Mestre (Ve) Italy
| | - Alessandro Ceriotti
- Dipartimento di Chimica; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
| | - Cristiana Cesari
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Iacopo Ciabatti
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Roberto Della Pergola
- Dipartimento di Scienze Ambientali e Territorio e Scienze della Terra; University of Milano Bicocca; Piazza della Scienza 1 20126 Milano Italy
| | - Cristina Femoni
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Maria Carmela Iapalucci
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Alba Storione
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”; Università di Bologna; Viale Risorgimento 4 40136 Bologna Italy
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6
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Bortoluzzi M, Ceriotti A, Ciabatti I, Della Pergola R, Femoni C, Carmela Iapalucci M, Storione A, Zacchini S. Platinum carbonyl clusters stabilized by Sn(ii)-based fragments: syntheses and structures of [Pt6(CO)6(SnCl2)2(SnCl3)4]4−, [Pt9(CO)8(SnCl2)3(SnCl3)2(Cl2SnOCOSnCl2)]4−and [Pt10(CO)14{Cl2Sn(OH)SnCl2}2]2−. Dalton Trans 2016; 45:5001-13. [DOI: 10.1039/c5dt04696c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Low valent Pt carbonyl clusters decorated by Sn(ii) fragments have been obtained from [Pt15(CO)30]2−and SnCl2.
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Affiliation(s)
- Marco Bortoluzzi
- Dipartimento di Scienze Molecolari e Nanosistemi
- Ca’ Foscari University of Venice
- 30175 Mestre (Ve)
- Italy
| | | | - Iacopo Ciabatti
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- 40136 Bologna
- Italy
| | - Roberto Della Pergola
- Dipartimento di Scienze Ambientali e Territorio e Scienze della Terra
- University of Milano Bicocca
- 20126 Milano
- Italy
| | - Cristina Femoni
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- 40136 Bologna
- Italy
| | | | - Alba Storione
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- 40136 Bologna
- Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- 40136 Bologna
- Italy
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7
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Bortoluzzi M, Ciabatti I, Femoni C, Hayatifar M, Iapalucci MC, Zacchini S. [H3–nFe4(CO)12(IrCOD)]n− (n = 1, 2) and [H2Fe3(CO)10(IrCOD)]− Bimetallic Fe–Ir Hydride Carbonyl Clusters. Organometallics 2014. [DOI: 10.1021/om5010513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marco Bortoluzzi
- Dipartimento
di Scienze Molecolari e Nanosistemi, Ca’ Foscari University of Venice, Dorsoduro 2137, 30123 Venezia, Italy
| | - Iacopo Ciabatti
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Cristina Femoni
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Mohammad Hayatifar
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Maria Carmela Iapalucci
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Stefano Zacchini
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
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8
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Ciabatti I, Femoni C, Gaboardi M, Iapalucci MC, Longoni G, Pontiroli D, Riccò M, Zacchini S. Structural rearrangements induced by acid-base reactions in metal carbonyl clusters: the case of [H(3-n)Co15Pd9C3(CO)38]n- (n = 0-3). Dalton Trans 2014; 43:4388-99. [PMID: 24264428 DOI: 10.1039/c3dt52527a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The new bimetallic [HCo15Pd9C3(CO)38](2-) tri-carbide carbonyl cluster has been obtained from the reaction of [H2Co20Pd16C4(CO)48](4-) with an excess of acid in CH2Cl2 solution. The mono-hydride di-anion can be reversibly protonated and deprotonated by means of acid-base reactions leading to closely related [H(3-n)Co15Pd9C3(CO)38](n-) (n = 0-3) clusters. The crystal structures of the three anionic and the neutral clusters have been determined as their H3Co15Pd9C3(CO)38·2thf, [NEt4][H2Co15Pd9C3(CO)38]·0.5C6H14, [NMe3(CH2Ph)]2[HCo15Pd9C3(CO)38]·C6H14 and [NEt4]3[Co15Pd9C3(CO)38]·thf salts. They are composed of a Pd9(μ3-CO)2 core stabilised by three Co5C(CO)12 organometallic fragments. The poly-hydride nature of these clusters has been indirectly inferred via chemical, electrochemical and magnetic measurements. Besides, cyclic voltammetry shows that the [H(3-n)Co15Pd9C3(CO)38](n-) (n = 1-3) anions are multivalent, since they undergo two or three reversible oxidations. SQUID measurements of [HCo15Pd9C3(CO)38](2-) indicate that this even electron cluster is paramagnetic with two unpaired electrons, giving further support to its hydride nature. Finally, structural studies show that the Pd9 core of [H(3-n)Co15Pd9C3(CO)38](n-) (n = 0,1) is a tri-capped octahedron, which becomes a tri-capped trigonal prism in the more charged [H(3-n)Co15Pd9C3(CO)38](n-) (n = 2,3) anions. Such a significant structural rearrangement of the metal core of a large carbonyl cluster upon protonation-deprotonation reactions is unprecedented in cluster chemistry, and suggests that interstitial hydrides may have relevant stereochemical effects even in large carbonyl clusters.
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Affiliation(s)
- Iacopo Ciabatti
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
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9
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Ciabatti I, Fabrizi de Biani F, Femoni C, Iapalucci MC, Longoni G, Zacchini S. Metal Segregation in Bimetallic CoPd Carbide Carbonyl Clusters: Synthesis, Structure, Reactivity and Electrochemistry of [H6−nCo20Pd16C4(CO)48]n−(n=3-6). Chempluschem 2013; 78:1456-1465. [DOI: 10.1002/cplu.201300268] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Indexed: 11/10/2022]
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10
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Ciabatti I, Fabrizi de Biani F, Femoni C, Iapalucci MC, Longoni G, Zacchini S. Selective synthesis of the [Ni36Co8C8(CO)48]6- octa-carbide carbonyl cluster by thermal decomposition of the [H2Ni22Co6C6(CO)36]4- hexa-carbide. Dalton Trans 2013; 42:9662-70. [PMID: 23676989 DOI: 10.1039/c3dt50710f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal decomposition in thf solution of [H2Ni22Co6C6(CO)36](4-) results in the new [HNi36Co8C8(CO)48](5-) bimetallic Ni-Co octa-carbide, which can be converted into the closely related [H6-nNi36Co8C8(CO)48](n-) (n = 3-6) polyhydrides by means of acid-base reactions. The structure of the [Ni36Co8C8(CO)48](6-) hexa-anion has been established via X-ray crystallography, showing that the eight interstitial carbide atoms are lodged within different metal cages. Thus, two C-atoms are enclosed within regular square anti-prismatic Ni8C cages, four within irregular Ni8C square anti-prismatic cages, and the last two within mono-capped trigonal prismatic Ni5Co2C cages. The structure of [Ni36Co8C8(CO)48](6-) is non-compact and closely related to [Ni32C6(CO)38](6-) and [HNi38C6(CO)44](5-). [Ni36Co8C8(CO)48](6-) approaches the nanosize regime and the whole molecular ion has a diameter (measured from the outer oxygen atoms) of ca. 1.61 nm.
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Affiliation(s)
- Iacopo Ciabatti
- Dipartimento di Chimica Industriale Toso Montanari, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
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11
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Bernardi A, Ciabatti I, Femoni C, Iapalucci MC, Longoni G, Zacchini S. Ni-Cu tetracarbide carbonyls with vacant Ni(CO) fragments as borderline compounds between molecular and quasi-molecular clusters. Dalton Trans 2012; 42:407-21. [PMID: 23069730 DOI: 10.1039/c2dt31719b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of [Ni(9)C(CO)(17)](2-) with [Cu(CH(3)CN)(4)][BF(4)] (1.1-1.5 equiv.) afforded the first Ni-Cu carbide carbonyl cluster, i.e., [H(2)Ni(30)C(4)(CO)(34){Cu(CH(3)CN)}(2)](4-) ([H(2)1](4-)). This has been crystallised in a pure form with miscellaneous [NR(4)](+) (R = Me, Et) cations, as well as co-crystallised with [H(2)Ni(29)C(4)(CO)(33){Cu(CH(3)CN)}(2)](4-) ([H(2)2](4-)) which differs from [H(2)1](4-) by a missing Ni(CO) fragment. By increasing the [Cu(CH(3)CN)(4)](+)/[Ni(9)C(CO)(17)](2-) ratio to 1.7-1.8, the closely related [H(2)Ni(30)C(4)(CO)(35){Cu(CH(3)CN)}(2)](2-) ([H(2)3](2-)), [H(2)Ni(29)C(4)(CO)(34){Cu(CH(3)CN)}(2)](2-) ([H(2)4](2-)), and [H(2)Ni(29)C(4)(CO)(32)(CH(3)CN)(2){Cu(CH(3)CN)}(2)](2-) ([H(2)5](2-)) dianions have been obtained. Replacement of Cu-bonded CH(3)CN with p-NCC(6)H(4)CN afforded, after protonation of the tetra-anion, mixtures of [H(3)Ni(30)C(4)(CO)(34){Cu(NCC(6)H(4)CN)}(2)](3-) ([H(3)6](3-)) and [H(3)Ni(29)C(4)(CO)(33){Cu(NCC(6)H(4)CN)}(2)](3-) ([H(3)7](3-)). The species 1-7 display a common Ni(28)C(4)Cu(2) core and differ for the charge, the presence of additional Ni atoms, the number and nature of the ligands, even though they are obtained under similar experimental conditions and often in mixtures. Their nature in solution has been investigated via FT-IR, chemical and electrochemical methods. Electrochemical studies, besides confirming the poly-hydride nature of these clusters, show that they undergo different redox processes with features of chemical reversibility, and this might be taken as proof of the incipient metallisation of their metal cores.
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Affiliation(s)
- Alessandro Bernardi
- Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4-40136 Bologna, Italy
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12
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Ciabatti I, Femoni C, Iapalucci MC, Longoni G, Zacchini S. Bimetallic Nickel–Cobalt Hexacarbido Carbonyl Clusters [H6–nNi22Co6C6(CO)36]n− (n = 3–6) Possessing Polyhydride Nature and Their Base-Induced Degradation to the Monoacetylide [Ni9CoC2(CO)16–x]3– (x = 0, 1). Organometallics 2012. [DOI: 10.1021/om300412d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iacopo Ciabatti
- Dipartimento di Chimica
Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4,
40136 Bologna, Italy
| | - Cristina Femoni
- Dipartimento di Chimica
Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4,
40136 Bologna, Italy
| | - Maria Carmela Iapalucci
- Dipartimento di Chimica
Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4,
40136 Bologna, Italy
| | - Giuliano Longoni
- Dipartimento di Chimica
Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4,
40136 Bologna, Italy
| | - Stefano Zacchini
- Dipartimento di Chimica
Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4,
40136 Bologna, Italy
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13
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Femoni C, Iapalucci MC, Longoni G, Zacchini S, Fedi S, Fabrizi de Biani F. Cage Rearrangements in Dodecanuclear Co-Pt Dicarbido Clusters Promoted by Redox Reactions. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101386] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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15
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Zacchini S. Using Metal Carbonyl Clusters To Develop a Molecular Approach towards Metal Nanoparticles. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100462] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Stefano Zacchini
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale Risorgimento 4‐40136 Bologna, Italy, Fax: +39‐0512093690
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16
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Shieh M, Miu CY, Huang KC, Lee CF, Chen BG. Stepwise construction of manganese-chromium carbonyl chalcogenide complexes: synthesis, electrochemical properties, and computational studies. Inorg Chem 2011; 50:7735-48. [PMID: 21774481 DOI: 10.1021/ic200885h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
When trigonal-bipyramidal clusters, [PPN][E(2)Mn(3)(CO)(9)] (E = S, Se), were treated with Cr(CO)(6) and PPNCl in a molar ratio of 1:1:2 or 1:2:2 in 4 M KOH/MeCN/MeOH solutions, mono-Cr(CO)(5)-incorporated HE(2)Mn(3)-complexes [PPN](2)[HE(2)Mn(3)Cr(CO)(14)] (E = S, [PPN](2)[1a]; Se, [PPN](2)[1b]), respectively, were formed. X-ray crystallographic analysis showed that 1a and 1b were isostructural and each displayed an E(2)Mn(3) square-pyramidal core with one of the two basal E atoms externally coordinated with one Cr(CO)(5) group and one Mn-Mn bond bridged by one hydrogen atom. However, when the TMBA(+) salts for [E(2)Mn(3)(CO)(9)](-) were mixed with Cr(CO)(6) in a molar ratio of 1:1 in 4 M KOH/MeOH solutions and refluxed at 60 °C, mono-Cr(CO)(3)-incorporated E(2)Mn(3)Cr octahedral clusters [TMBA](3)[E(2)Mn(3)Cr(CO)(12)] (E = S, [TMBA](3)[2a]; Se, [TMBA](3)[2b]), respectively, were obtained. Clusters 2a and 2b were isostructural, and each consisted of an octahedral E(2)Mn(3)Cr core, in which each Mn-Mn or Mn-Cr bond of the Mn(3)Cr plane was semibridged by one carbonyl ligand. Clusters 1a and 1b (with [TMBA] salts) underwent metal core closure to form octahedral clusters 2a and 2b upon treatment with KOH/MeOH at 60 °C. In addition, 1a and 1b were found to undergo cluster expansion to form di-Cr(CO)(5)-incorporated HE(2)Mn(3)-clusters [HE(2)Mn(3)Cr(2)(CO)(19)](2-) (E = S, 3a; Se, 3b), respectively, upon the addition of 1 or 2 equiv of Cr(CO)(6) heated in refluxing CH(2)Cl(2). Clusters 3a and 3b were structurally related to clusters 1a and 1b, but with the other bare E atom (E = S, 3a; Se, 3b) further externally coordinated with one Cr(CO)(5) group. The nature, cluster transformation, and electrochemical properties of the mixed manganese-chromium carbonyl sulfides and selenides were systematically discussed in terms of the chalcogen elements, the introduced chromium carbonyl group, and the metal skeleton with the aid of molecular calculations at the BP86 level of the density functional theory.
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Affiliation(s)
- Minghuey Shieh
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan, Republic of China.
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17
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Femoni C, Iapalucci MC, Longoni G, Zacchini S. Hetero-Bimetallic Ni-Rh Carbido Carbonyl Clusters: Synthesis, Structure and13C NMR of [Ni10Rh2C(CO)20]2-, [Ni9Rh3C(CO)20]3-and [Ni6Rh8(C2)2(CO)24]4-. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900039] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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18
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Naitabdi A, Toulemonde O, Bucher JP, Rosé J, Braunstein P, Welter R, Drillon M. Grafting and thermal stripping of organo-bimetallic clusters on AU surfaces: toward controlled CO/RU aggregates. Chemistry 2008; 14:2355-62. [PMID: 18205161 DOI: 10.1002/chem.200701500] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The controlled stoichiometry of heterometallic carbonyl clusters make them attractive precursors for the stabilization of bare metal alloy clusters for magnetic applications. The mixed-metal molecular cluster [RuCo3(H)(CO)12] has been functionalized with the phosphane-thiol ligand Ph2PCH2CH2SH to allow subsequent anchoring on a gold surface. The resulting tetrahedral cluster [RuCo3(H)(CO)11(Ph2PCH2CH2SH)] (1) has been characterized by X-ray diffraction and the P-monodentate ligand is axially bound to a cobalt center and trans to the ruthenium cap. This synthesis also yielded the product of oxidative coupling, in which two SH groups were coupled intermolecularly to give a disulfide ligand that links two tetrahedral cluster units in [{RuCo3(H)(CO)11(Ph2PCH2CH2S)}2] (2). This cluster has also been characterized by X-ray diffractions studies. After deposition of 1 on a Au(111) surface by self-assembly, the carbonyl ligands were stripped off by thermal annealing in ultra-high vacuum (UHV) to form a metallic species. X-ray photoelectron spectroscopic measurements performed as a function of the annealing temperature show that the cobalt and ruthenium centers converge towards metallic character and that the stoichiometry of the alloy is retained during the annealing process. Preliminary X-ray absorption spectroscopy (XAS) synchrotron experiments indicate that clusters 1 and 2 behave similarly, which is consistent with the retention of their tetrahedral units on the gold surface after transformation of the thiol function or breaking of the disulfide bond to form Au--S bonds, respectively, has occurred.
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Affiliation(s)
- Ahmed Naitabdi
- Institut de Physique et Chimie des Matériaux de Strasbourg UMR 7504 CNRS Université Louis Pasteur, 23 rue du Loess, 67037 Strasbourg, France
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Molecular Clusters in Mesoporous Materials as Precursors to Nanoparticles of a New Lacunar Ternary Compound Pd x Mo y P. J CLUST SCI 2008. [DOI: 10.1007/s10876-007-0171-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rodriguez-Zubiri M, Gallo V, Rosé J, Welter R, Braunstein P. Assembling metals and clusters around an octaphosphine ligand based on N-substituted bis(diphenylphosphanyl)amines: structural characterization of dendrimer-like Co12and Co16branched clusters. Chem Commun (Camb) 2008:64-6. [DOI: 10.1039/b713540h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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