1
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Berkson ZJ, Bernhardt M, Copéret C. Solid-State 183W NMR Spectroscopy as a High-Resolution Probe of Polyoxotungstate Structures and Dynamics. J Phys Chem Lett 2024; 15:1950-1955. [PMID: 38346175 DOI: 10.1021/acs.jpclett.4c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Polyoxometalates such as ammonium paratungstate (APT) constitute an important class of metal oxides with applications for catalysis, (opto)electronics, and functional materials. Structural analyses of solid polyoxometalates mostly rely on X-ray or neutron diffraction techniques, which are largely limited to compounds that can be isolated with long-range crystallographic order. While 183W NMR has been shown to probe polyoxotungstate structures and dynamics in solution, its application to solids has been extremely limited. Here, state-of-the-art methods for the detection of solid-state 183W NMR spectra are tested and compared for APT in different hydration states. The highly resolved solid-state spectra distinguish each crystallographically distinct site in the tungstate structure. Furthermore, the 183W chemical shifts are shown to be highly sensitive to the local structure, dynamics, and symmetry of APT, establishing solid-state 183W NMR spectroscopy as a potent probe for analysis of polyoxotungstates and other tungsten-derived materials to complement solution NMR and diffraction-based techniques.
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Affiliation(s)
- Zachariah J Berkson
- Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
| | - Moritz Bernhardt
- Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
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2
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Berijani K, Morsali A, Hupp JT. An effective strategy for creating asymmetric MOFs for chirality induction: a chiral Zr-based MOF for enantioselective epoxidation. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00565j] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A simple and rapid procedure was used to prepare chiral NU-1000 as a robust Zr-based MOF without complexity. The functionalization of NU-1000 was performed by utilizing chirall-(+)-tartaric acidviasolvent-assisted linker incorporation, resulting in [C-NU-1000]. A Mo-complex was immobilized onto chiral NU-1000 for enantioselective epoxidation.
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Affiliation(s)
- Kayhaneh Berijani
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Iran
| | - Ali Morsali
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Iran
| | - Joseph T. Hupp
- Department of Chemistry
- Northwestern University
- Evanston
- USA
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3
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Abdalghani I, Biancalana L, Aschi M, Pampaloni G, Marchetti F, Crucianelli M. Dioxomolybdenum(VI) compounds with α-amino acid donor ligands as catalytic precursors for the selective oxyfunctionalization of olefins. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.12.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Ryan DE, Cardin DJ, Hartl F. η3-Allyl carbonyl complexes of group 6 metals: Structural aspects, isomerism, dynamic behaviour and reactivity. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Reich RM, Kaposi M, Pöthig A, Kühn FE. Kinetic studies of fluorinated aryl molybdenum(ii) tricarbonyl precursors in epoxidation catalysis. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02220g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Benzyl substituted molybdenum tricarbonyl complexes displaying CF3 groups are synthesized and applied as catalyst precursors in olefin epoxidation reactions.
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Affiliation(s)
- Robert M. Reich
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Marlene Kaposi
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Alexander Pöthig
- Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Fritz E. Kühn
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
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6
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Comparing spectroscopic and electrochemical properties of complexes of type Cp’M(η3-C3H5)(CO)2 (Cp’ = Cp, Ind, Flu): A complementary experimental and DFT study. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Graser L, Reich RM, Cokoja M, Pöthig A, Kühn FE. Aryl-substituted organomolybdenum(ii) complexes as olefin epoxidation catalysts. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00447k] [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
The epoxidation of selected olefins with a benzyl-substituted organomolybdenum complex and its fluorinated counterpart is described.
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Affiliation(s)
- Lilian Graser
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Robert M. Reich
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Mirza Cokoja
- Department of Chemistry
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Alexander Pöthig
- Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Fritz E. Kühn
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
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8
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Schmidt A, Grover N, Zimmermann TK, Graser L, Cokoja M, Pöthig A, Kühn FE. Synthesis and characterization of novel cyclopentadienyl molybdenum imidazo[1,5-a]pyridine-3-ylidene complexes and their application in olefin epoxidation catalysis. J Catal 2014. [DOI: 10.1016/j.jcat.2014.08.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Streubel R, Özbolat-Schön A, von Frantzius G, Lee H, Schnakenburg G, Gudat D. Li/X phosphinidenoid pentacarbonylmetal complexes: a combined experimental and theoretical study on structures and spectroscopic properties. Inorg Chem 2013; 52:3313-25. [PMID: 23470227 DOI: 10.1021/ic302786v] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthesis of P-F phosphane metal complexes [(CO)5M{RP(H)F}] 2a-c (R = CH(SiMe3)2; a: M = W; b: M = Mo; c: M = Cr) is described using AgBF4 for a Cl/F exchange in P-Cl precursor complexes [(CO)5M{RP(H)Cl}] 3a-c; thermal reaction of 2H-azaphosphirene metal complexes [(CO)5M{RP(C(Ph)═N}] 1a-c with [Et3NH]X led to complexes 3a-c, 4, and 5 (M = W; a-c: X = Cl; 4: X = Br; 5: X = I). Complexes 2a-c, 3a-c, 4, and 5 were deprotonated using lithium diisopropylamide in the presence of 12-crown-4 thus yielding Li/X phosphinidenoid metal complexes [Li(12-crown-4)(Et2O)n][(CO)5M(RPX)] 6a-c, 7a-c, 8, and 9 (6a-c: M = W, Mo, Cr; X = F; 7a-c: M = W, Mo, Cr; X = Cl; 8: M = W; X = Br; 9: M = W; X = I). This first comprehensive study on the synthesis of the title compounds reveals metal and halogen dependencies of NMR parameters as well as thermal stabilities of 6a, 7a, 8, and 9 in solution (F > Cl > Br > I). DOSY NMR experiments on the Li/F phosphinidenoid metal complexes (6a-c; M = W, Mo, Cr) rule out that the cation and anion fragments are part of a persistent molecular complex or tight ion pair (in solution). The X-ray structure of 6a reveals a salt-like structure of [Li(12-crown-4)Et2O][(CO)5W{P(CH(SiMe3)2)F}] with long P-F and P-W bond distances compared to 2a. Density functional theory (DFT) calculations provide additional insight into structures and energetics of cation-free halophosphanido chromium and tungsten complexes and four contact ion pairs of Li/X phosphinidenoid model complexes [Li(12-crown-4)][(CO)5M{P(R)X}] (A-D) that represent principal coordination modes. The significant increase of the compliance constant of the P-F bond in the anionic complex [(CO)5W{P(Me)F}] (10a) revealed that a formal lone pair at phosphorus weakens the P-F bond. This effect is further enhanced by coordination of lithium and/or the Li(12-crown-4) countercation (to 10a) as in type A-D complexes. DFT calculated phosphorus NMR chemical shifts allow for a consistent interpretation of NMR properties and provide a preliminary explanation for the "abnormal" NMR shift of P-Cl derivatives 7a-c. Furthermore, calculated compliance constants reveal the degree of P-F bond weakening in Li/F phosphinidenoid complexes, and it was found that a more negative phosphorus-fluorine coupling constant is associated with a larger relaxed force constant.
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Affiliation(s)
- Rainer Streubel
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
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10
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Dias Filho NL, Portugal FCM, Nogueira JMF, Brandão P, Félix V, Vaz PD, Nunes CD, Veiros LF, Brito MJVD, Calhorda MJ. An Oligosilsesquioxane Cage Functionalized with Molybdenum(II) Organometallic Fragments. Organometallics 2012. [DOI: 10.1021/om3003043] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Newton L. Dias Filho
- Faculdade de Engenharia de Ilha
Solteira, UNESP-Univ Estadual Paulista, Departamento de Fı́sica e Quı́mica, Av. Brasil Centro, 56 CEP 15385-000, Ilha Solteira SP, Brasil
| | - Fátima C. M. Portugal
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Universidade de Lisboa,
Faculdade de Ciências, Centro
de Química e Bioquı́mica,
Campo Grande, 1749-016 Lisboa, Portugal
| | - J. M. F. Nogueira
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Universidade de Lisboa,
Faculdade de Ciências, Centro
de Química e Bioquı́mica,
Campo Grande, 1749-016 Lisboa, Portugal
| | - Paula Brandão
- Departamento de
Quı́mica, Universidade de Aveiro, CICECO, 3810-193 Aveiro, Portugal
| | - Vitor Félix
- Departamento de
Quı́mica, Universidade de Aveiro, CICECO, 3810-193 Aveiro, Portugal
- Secção Autónoma de Ciências da Saúde, Universidade de Aveiro, 3810-193 Aveiro,
Portugal
| | - Pedro D. Vaz
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Universidade de Lisboa,
Faculdade de Ciências, Centro
de Química e Bioquı́mica,
Campo Grande, 1749-016 Lisboa, Portugal
| | - Carla D. Nunes
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Universidade de Lisboa,
Faculdade de Ciências, Centro
de Química e Bioquı́mica,
Campo Grande, 1749-016 Lisboa, Portugal
| | - Luis F. Veiros
- Centro de Quı́mica Estrutural,
Instituto
Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Maria J. Villa de Brito
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Centro de Quı́mica Estrutural,
Instituto
Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Maria José Calhorda
- Universidade de Lisboa, Faculdade de Ciências, Departamento de Quı́mica e Bioquı́mica, Campo Grande, 1749-016 Lisboa, Portugal
- Universidade de Lisboa,
Faculdade de Ciências, Centro
de Química e Bioquı́mica,
Campo Grande, 1749-016 Lisboa, Portugal
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11
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cis-Dioxo-molybdenum(VI) Schiff base complexes: Synthesis, crystal structure and catalytic performance for homogeneous oxidation of olefins. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.02.005] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Egorochkin AN, Kuznetsova OV, Khamaletdinova NM, Kurskii YA. NMR spectroscopy on heavy nuclei of transition metal complexes. The role of polarization effect. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s1070363211120061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Holm RH, Solomon EI, Majumdar A, Tenderholt A. Comparative molecular chemistry of molybdenum and tungsten and its relation to hydroxylase and oxotransferase enzymes. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2010.10.017] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Chakrahari KKV, Dhayal RS, Ghosh S. Synthesis and characterization of binuclear μ-oxo and μ-telluro molybdenum(V) complexes, [Cp∗Mo(O)(μ-Te)]2. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Pedrosa M, Escribano J, Aguado R, Sanz R, Díez V, Arnáiz F. Addition compounds of MoO2Cl2 with chiral sulfoxides. First molecular structures of dioxomolybdenum complexes bearing chiral non-racemic sulfoxide as ligand. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.05.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Solid-state 95Mo NMR of mixed-valence polyoxomolybdates (V, VI) with localized or delocalized d1 electrons. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Egorochkin AN, Kuznetsova OV, Khamaletdinova NM, Kurskii YA, Domratcheva-Lvova LG, Domrachev GA. Transition metal NMR chemical shifts and polarizability effect in organometallic complexes. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:782-790. [PMID: 19557731 DOI: 10.1002/mrc.2465] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The literature data on substituent influence on the (51)V, (55)Mn, (57)Fe, (59)Co, (61)Ni, (95)Mo, (103)Rh, (183)W, (187)Os and (195)Pt NMR chemical shifts (delta) and on J (M, P; M = Mn, Fe, Mo, Rh, W, Os) coupling constants have been analyzed for 30 series of the organometallic complexes. It has been established for the first time that the delta and J values depend on the inductive, resonance and polarizability effects of substituents. The polarizability effect is caused by the partial charge on the central M atom. The contribution of this effect ranges from 3 to 86%.
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Affiliation(s)
- Alexey N Egorochkin
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinin Str., 603950 Nizhny Novgorod, Russia
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18
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Bagherzadeh M, Tahsini L, Latifi R, Keith Woo L. cis-Dioxo-molybdenum(VI)-oxazoline complex catalyzed epoxidation of olefins by tert-butyl hydrogen peroxide. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.030] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Brito JA, Teruel H, Massou S, Gómez M. 95Mo NMR: a useful tool for structural studies in solution. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:573-577. [PMID: 19350588 DOI: 10.1002/mrc.2431] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Oxomolybdenum(VI) complexes containing diverse ligands from an electronic and topological point of view have been analysed by means of (95)Mo NMR in solution with the purpose of using this technique as a tool to study their coordination chemistry and reactivity. The relationship between the electronic density on the metal tuned by the electron-donor ability of the coordinated ligands and the (95)Mo chemical shift has been proved for mono- and bimetallic complexes showing a hexa- or hepta-coordination around the metal centre. The different origins of the signal broadening (associated either to the symmetry of the metallic polyhedron or to the presence of isomers or to the ligand de-coordination) have been also considered to rationalise the obtained data.
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Affiliation(s)
- José Angel Brito
- Laboratoire Hétérochimie Fondamentale et Appliquée, UMR-CNRS 5069, Bât 2R1, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex 9, France
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20
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Justino LLG, Ramos ML, Kaupp M, Burrows HD, Fiolhais C, Gil VMS. Density functional theory study of the oxoperoxo vanadium(V) complexes of glycolic acid. Structural correlations with NMR chemical shifts. Dalton Trans 2009:9735-45. [DOI: 10.1039/b910033d] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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22
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Pope MT. Molybdenum Oxygen Chemistry: Oxides, Oxo Complexes, and Polyoxoanions. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166406.ch4] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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23
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Wang B, Sasaki Y, Nagasawa A, Ito T. Molybdenum-Tungsten Mixed-Metal Trinuclear Clusters with Two Capping Oxides and Six Bridging Acetates, and Other Mixed Molybdenum-Tungsten Clusters. J COORD CHEM 2007. [DOI: 10.1080/00958978808080687] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Bateer Wang
- a Department of Chemistry, Faculty of Science , Tohoku University , Aoba, Aramaki , Sendai , 980 , Japan
- b Department of Chemistry , Inner-Mongolia Pedagogical University , Huhhot , People's Republic of China
| | - Yoichi Sasaki
- a Department of Chemistry, Faculty of Science , Tohoku University , Aoba, Aramaki , Sendai , 980 , Japan
| | - Akira Nagasawa
- a Department of Chemistry, Faculty of Science , Tohoku University , Aoba, Aramaki , Sendai , 980 , Japan
| | - Tasuku Ito
- a Department of Chemistry, Faculty of Science , Tohoku University , Aoba, Aramaki , Sendai , 980 , Japan
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24
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Song S, Alyea EC. An Assessment of the Parameters Relevant to the Subdivision of σ and Ω Electronic Effects in M-P Bonds. COMMENT INORG CHEM 2006. [DOI: 10.1080/02603599608032719] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Stosur M, Kochel A, Keller A, Szymańska-Buzar T. Photochemical Reaction of Mo(CO)6 with Et2SiH2: Spectroscopic Characterization and Crystal Structure of the Bis{(μ-η2-hydridodiethylsilyl)tetracarbonylmolybdenum(I)} Complex [{Mo(μ-η2-H−SiEt2)(CO)4}2]. Organometallics 2006. [DOI: 10.1021/om060290d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Magdalena Stosur
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Andrzej Kochel
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Antoni Keller
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Teresa Szymańska-Buzar
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
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26
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Chiral ansa-bridged η5-cyclopentadienyl molybdenum complexes: Synthesis, structure and application in asymmetric olefin epoxidation. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.10.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Lenoble G, Hasenknopf B, Thouvenot R. A Strategy for the Analysis of Chiral Polyoxotungstates by Multinuclear (31P, 183W) NMR Spectroscopy Applied to the Assignment of the 183W NMR Spectra of α1-[P2W17O61]10- and α1-[YbP2W17O61]7-. J Am Chem Soc 2006; 128:5735-44. [PMID: 16637641 DOI: 10.1021/ja0575934] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper describes the complete assignment of the 183W NMR spectra of the chiral polyoxometalates alpha1-[P2W17O61]10- and alpha1-[YbP2W17O61]7- in aqueous solution. These spectra display each 17 lines of equal intensity with a relatively narrow chemical shift distribution. The identification of signals is based on selective 31P-183W decoupling and recognition of particular sets of coupling constants for tungsten atoms around the lacunary site. Further assignment is obtained by 183W 2D-COSY NMR experiments. We demonstrate herewith a new way for the unambiguous assignment of 183W NMR spectra of polyoxotungstates without any symmetry elements or tungsten atoms in special positions. This way relies on the correlation of the magnitude of 2J(W-W) coupling constants with the geometry of oxo-bridges in polyoxotungstates. These results open the way to monitor interaction sites of chiral polyoxotungstates with organic ligands.
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Affiliation(s)
- Géraldine Lenoble
- Université Pierre et Marie Curie--Paris 6, Institut de Chimie Moléculaire FR 2769, Laboratoire de Chimie Inorganique et Matériaux Moléculaires (UMR CNRS 7071), Case Courrier 42, 4 place Jussieu, 75252 Paris Cedex 05, France
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28
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Zhao J, Sakthivel A, Santos AM, Kühn FE. Siloxane functionalized cyclopentadienyl-molybdenum complexes: Synthesis, characterization and catalytic application. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2005.03.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Molybdenum and tungsten complexes of composition (η5-C5R5)MR′(CO)3 and their use as olefin epoxidation catalyst precursors. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.07.023] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Hursthouse MB, Levason W, Ratnani R, Reid G. Synthesis and spectroscopic properties of Mo(VI) complexes with phosphine oxide ligands and the crystal structures of [MoO2X2(OPMe3)2] (X=Cl or Br) and [MoO2Br2{o-C6H4(P(O)Ph2)2}]·2CH2Cl2. Polyhedron 2004. [DOI: 10.1016/j.poly.2004.04.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Synthesis and characterization of cis-Mo(CO)4(L–L′) and cis-Mo(CO)2(L–L′)2 complexes of N(1)-methyl-2-(arylazo)imidazoles (L–L′). Correlations of spectroscopic data with substituent effects. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00793-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Szalontai G, Kiss G, Bartha L. Equilibria of mononuclear oxomolybdenum(VI) complexes of triethanolamine. A multinuclear dynamic magnetic resonance study of structure and exchange mechanisms. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2003; 59:1995-2007. [PMID: 12788453 DOI: 10.1016/s1386-1425(02)00445-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
1D and 2D 1H and 13C NMR spectra of the assumed [MoO(4)(TEA)](2-) complex recorded in DMSO at variable temperatures clearly indicate one free and two bound hydroxyethyl arms. The free arm of the ligand readily exchanges with the two metal-bound arms. Under such conditions the triethanolamine (TEA) acts as a bidentate ligand. The presence of water accelerates the exchange, which at higher water content involves the free ligand too. In organic solvents the binding strength of the hydroxo groups to the molybdenum is weaker than that of the water molecules. A plausible structure is confirmed by 14N, 17O and 95Mo measurements and an exchange mechanism based on the existence of an eight-membered relatively rigid chelate ring is suggested.
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Affiliation(s)
- Gábor Szalontai
- NMR laboratory, University of Veszprém, H-8200 Veszprém, Pf. 158, Hungary.
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33
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Abrantes M, Santos AM, Mink J, Kühn FE, Romão CC. A Simple Entry to (η5-C5R5)chlorodioxomolybdenum(VI) Complexes (R = H, CH3, CH2Ph) and Their Use as Olefin Epoxidation Catalysts. Organometallics 2003. [DOI: 10.1021/om0300023] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marta Abrantes
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt 127, 2781-901 Oeiras, Portugal, Anorganisch-chemisches Institut der Technischen Universität München, Lichtenberstrasse 4, D-85747 Garching bei München, Germany, Institute of Isotope and Surface Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary, Vezprém University, PO Box 158, H-8201 Vezprém, Hungary
| | - Ana M. Santos
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt 127, 2781-901 Oeiras, Portugal, Anorganisch-chemisches Institut der Technischen Universität München, Lichtenberstrasse 4, D-85747 Garching bei München, Germany, Institute of Isotope and Surface Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary, Vezprém University, PO Box 158, H-8201 Vezprém, Hungary
| | - Janos Mink
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt 127, 2781-901 Oeiras, Portugal, Anorganisch-chemisches Institut der Technischen Universität München, Lichtenberstrasse 4, D-85747 Garching bei München, Germany, Institute of Isotope and Surface Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary, Vezprém University, PO Box 158, H-8201 Vezprém, Hungary
| | - Fritz E. Kühn
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt 127, 2781-901 Oeiras, Portugal, Anorganisch-chemisches Institut der Technischen Universität München, Lichtenberstrasse 4, D-85747 Garching bei München, Germany, Institute of Isotope and Surface Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary, Vezprém University, PO Box 158, H-8201 Vezprém, Hungary
| | - Carlos C. Romão
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt 127, 2781-901 Oeiras, Portugal, Anorganisch-chemisches Institut der Technischen Universität München, Lichtenberstrasse 4, D-85747 Garching bei München, Germany, Institute of Isotope and Surface Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary, Vezprém University, PO Box 158, H-8201 Vezprém, Hungary
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34
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Arnáiz FJ, Aguado R, Pedrosa MR, De Cian A. Addition compounds of dichlorodioxomolybdenum(VI) with sulfoxides. Molecular structure of [MoO2Cl2(Me2SO)2]. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01434-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Ackermann MN, Moore KB, Colligan AS, Thomas-Wohlever JA, Warren KJ. Tetracarbonylmolybdenum complexes of 2-(phenylhydrazino)pyridine ligands. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(02)02140-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Minelli M, Hoang ML, Kraus M, Kucera G, Loertscher J, Reynolds M, Timm N, Chiang MY, Powell D. The effect of substituents on the phenyl portion of the imido ligand on the structure and properties of molybdenum(VI) imido complexes. Inorg Chem 2002; 41:5954-60. [PMID: 12425620 DOI: 10.1021/ic025642x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anilines with alkyl substituents on the phenyl ring (ArNH2 = 2,4,6-trimethylaniline; 2,3-, 2,4-, 2,6-, and 3,4-dimethylaniline; and 2,6-diisopropylaniline) react with MoO(X)2(dtc)2 (X = Cl or Br; dtc = diethyldithiocarbamate) in methanol in the presence of 2 equiv of triethylamine to form ionic imido complexes of the type [MoNAr(dtc)3]2[Mo6O19] or MoNAr(dtc)3]4[Mo8O26]. The same reaction in THF with butyllithium as base yields imido complexes of the type MoNAr(X)2(dtc)2. The structures of three ionic, five chloro, and two bromo complexes have been determined by X-ray crystallography. In all complexes, the molybenum center is a distorted pentagonal bipyramid. While the structures are similar, the angles of the imido linkages differ. The effect of the substituents on the phenyl ring of the imido ligand on the 95Mo NMR chemical shifts was determined. The Mo nucleus becomes more deshielded with the substituents in the following order: 3,4-Me2 < 2,3-Me2 < 2,4-Me2 < 2,6-Me2 < 2,4,6-Me3 < 2,6 isopropyl. Complexes with more deshielded 95Mo centers tend to have angles of the imido linkage that are closer to 180 degrees.
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Affiliation(s)
- Martin Minelli
- Department of Chemistry, Grinnell College, Grinnell, Iowa 50112, USA.
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37
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van Staveren D, Bothe E, Weyhermüller T, Metzler-Nolte N. Spectroscopic Properties, Electrochemistry, and Reactivity of Mo0, MoI, and MoII Complexes with the [Mo(bpa)(CO)3] Unit [bpa = bis(2-picolyl)amine] and Their Application for the Labelling of Peptides. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(200206)2002:6<1518::aid-ejic1518>3.0.co;2-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Ackermann MN, Kiihne SR, Saunders PA, Barnes CE, Stallings SC, Kim H, Woods C, Lagunoff M. Synthesis and studies of cis-Mo(CO)2(L–L′)2 and Mo(L–L′)3 complexes of 2-(phenylazo)pyridines (L–L′) and the crystal structures of Mo(CO)2(4-methyl-2-(phenylazo)pyridine)2 and Mo(4-methyl-2-(phenylazo)pyridine)3. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00851-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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40
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Lu SF, Huang JQ, Yu RM, Huang XY, Wu QJ, Peng Y, Chen J, Huang ZX, Zheng Y, Wu DX. Synthesis and structural characterization of hybrid Group 12, 14, 15 metals–molybdenum (tungsten) cluster compounds. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00838-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Gaemers S, Groenevelt J, Elsevier C. Transition Metal (53Cr, 59Co, 91Zr, and 95Mo) and 14N NMR Spectroscopy of Coordination Compounds Containing Nitrogen Donor Ligands in Low-Viscosity Fluids. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(200103)2001:3<829::aid-ejic829>3.0.co;2-f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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K�hn FE, Santos AM, Gon�alves IS, Rom�o CC, Lopes AD. Organorhenium(VII) and organomolybdenum(VI) oxides: synthesis and application in oxidation catalysis. Appl Organomet Chem 2001. [DOI: 10.1002/1099-0739(200101)15:1<43::aid-aoc121>3.0.co;2-i] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Kühn FE, Santos AM, Lopes AD, Gonçalves IS, Herdtweck E, Romão CC. (Dimethyl)dioxomolybdenum(VI) complexes: syntheses and catalytic applications. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1169(00)00200-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Ferreira P, Gonçalves I, Kühn F, Lopes A, Martins M, Pillinger M, Pina A, Rocha J, Romão C, Santos A, Santos T, Valente A. Mesoporous Silicas Modified with Dioxomolybdenum(VI) Complexes: Synthesis and Catalysis. Eur J Inorg Chem 2000. [DOI: 10.1002/1099-0682(200010)2000:10<2263::aid-ejic2263>3.0.co;2-u] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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45
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Weinert CS, Stern CL, Shriver DF. Preparation of [Bu4N]2[W6Cl8F6] and characterization of the clusters [Bu4N]2[W6Cl8X6] (X=F, Cl, Br, I, NCO, NCS, NCSe, or OSO2CF3) by 183W NMR spectroscopy. Inorganica Chim Acta 2000. [DOI: 10.1016/s0020-1693(00)00182-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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46
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Jin S, Venkataraman D, DiSalvo FJ. Ligand substitution reactions of W6S8L6 with tricyclohexylphosphine (L = 4-tert-butylpyridine or n-butylamine): 31P NMR and structural studies of W6S8(PCy3)n(4-tert-butylpyridine)6-n (0 < n < or = 6) complexes. Inorg Chem 2000; 39:2747-57. [PMID: 11232809 DOI: 10.1021/ic991426l] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The substitution reactions by bulky tricyclohexylphosphine (PCy3) ligands on W6S8L6 (L = 4-tert-butylpyridine or n-butylamine) clusters were investigated to prepare clusters with mixed axial ligands for low-dimensional cluster linking. When 4-6 equiv of PCy3 are used to react with W6S8(4-tert-butylpyridine)6 (4) in THF, cis-W6S8(PCy3)4(4-tert-butylpyridine)2 (1) is preferentially formed. But when starting with W6S8(n-butylamine)6 (2), only W6S8(PCy3)6 (3) is produced with 6 equiv of PCy3. Other conditions with fewer equivalents of PCy3 led to mixtures of partially substituted complexes in the W6S8L6-n(PCy3)n (0 < or = n < or = 6, L = 4-tert-butylpyridine or n-butylamine) series. A significantly distorted structure for 1 helps to explain its preferential formation. 1H NMR spectra were collected for clusters 1 and 2 and 31P NMR spectra for 1 and W6S8(4-tert-butylpyridine)6-n(PCy3)n complexes. P-P coupling through P-W-W-P is reported for the first time in octahedral metal clusters and shown to be very useful in identifying nearly all the W6S8L6-n(PR3)n complexes and their stereoisomers in the mixtures even before individual species are isolated.
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Affiliation(s)
- S Jin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
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47
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Synthesis and spectroscopic characterisation of tritelluroether, triselenoether, and trithioether complexes of Cr(0), Mo(0) and W(0). Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00425-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Lewis base adducts of bis-(halogeno)dioxomolybdenum(VI): syntheses, structures, and catalytic applications. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1169(99)00262-9] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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49
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Lu SF, Huang JQ, Huang XY, Wu QJ, Yu RM. Synthesis, Crystal Structure, and Spectroscopic Characterization of a Series of Cubane-like Mo−Sb Clusters Containing a [Mo3SbOS3]7+Core. Inorg Chem 1999. [DOI: 10.1021/ic971464+] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Carriedo GA, Alonso FJG, García JL, Carbajo RJ, Ortiz FL. Synthesis and1H-,15N-,31P-,183W-Multinuclear Magnetic Resonance Study of the Cyclotriphosphazenes [N3P3(dobp)2(OC5H4N-4)2] and [N3P3(dobp)(OC5H4N-4)4] and Their W(CO)5 Complexes (dobp = 2,2′-dioxybiphenyl). Eur J Inorg Chem 1999. [DOI: 10.1002/(sici)1099-0682(199906)1999:6<1015::aid-ejic1015>3.0.co;2-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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