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Osenga V, Sykes NC, Pa S, Bambha MK, Schley ND, Johnson MW. Comparative Analysis of the Donor Properties of Isomeric Pyrrolyl Phosphine Ligands. Organometallics 2024; 43:14-20. [PMID: 38213984 PMCID: PMC10777409 DOI: 10.1021/acs.organomet.3c00467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/11/2023] [Accepted: 12/11/2023] [Indexed: 01/13/2024]
Abstract
Understanding the net donor and electronic properties of pyrrole-based phosphines is critical for guiding their use as ligands. In this study, we compare two isomeric 1- and 2-(diphenylphosphino)methylpyrroles (L1 and L2, respectively) to determine the degree to which N-(phosphino)pyrroles are distinct from aryl- and 2-pyrrolyl phosphines. Ruthenium, rhodium, platinum, and gold complexes as well as selenide derivatives of these ligands are examined using NMR and IR spectroscopy, X-ray crystallography, and cyclic voltammetry. Ligand L2 exhibits net donor properties similar to those of the o-tolyl analogue L3, while L1 shows attenuated electron donation ability. Additionally, a model nickel-catalyzed Kumada coupling reaction using these three ligands was investigated.
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Affiliation(s)
- Vicky
A. Osenga
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Nolan C. Sykes
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Sopheak Pa
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Michael K. Bambha
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Nathan D. Schley
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Miles W. Johnson
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
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2
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Mies T, White AJP, Rzepa HS, Barluzzi L, Devgan M, Layfield RA, Barrett AGM. Syntheses and Characterization of Main Group, Transition Metal, Lanthanide, and Actinide Complexes of Bidentate Acylpyrazolone Ligands. Inorg Chem 2023; 62:13253-13276. [PMID: 37549423 PMCID: PMC10445273 DOI: 10.1021/acs.inorgchem.3c01506] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Indexed: 08/09/2023]
Abstract
The synthesis of acylpyrazolone salts and their complexes of main group elements, transition metals, lanthanides, and actinides are described and characterized inter alia by means of single-crystal X-ray crystallography, NMR, and IR spectroscopies. The complexes consist of two, three, or four acylprazolone ligands bound to the metal atom, resulting in a structurally diverse set of coordination complexes with (distorted) octahedral, pentagonal-bipyramidal, or antiprismatic arrangements. Several complexes proved to be polymeric in the solid state including heterobimetallic sodium/lanthanide coordination polymers. A selection of the polymeric compounds was analyzed via TG/DTA measurements to establish their stability. The ligands, in turn, were readily synthesized in good yields from commercially available hydrazine hydrochloride salts. These findings demonstrate that acylpyrazolone ligands can form complexes with metals of varying ionic radii, highlighted by their utility in other areas such as analytical and metal organic framework chemistry.
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Affiliation(s)
- Thomas Mies
- Department
of Chemistry, Imperial College, Molecular
Sciences Research Hub, White City Campus, 82 Wood Lane, London W12 0BZ, England
| | - Andrew J. P. White
- Department
of Chemistry, Imperial College, Molecular
Sciences Research Hub, White City Campus, 82 Wood Lane, London W12 0BZ, England
| | - Henry S. Rzepa
- Department
of Chemistry, Imperial College, Molecular
Sciences Research Hub, White City Campus, 82 Wood Lane, London W12 0BZ, England
| | - Luciano Barluzzi
- Department
of Chemistry, University of Sussex, Falmer, Brighton BN1 9QR, England
| | - Mohit Devgan
- Department
of Chemistry, Imperial College, Molecular
Sciences Research Hub, White City Campus, 82 Wood Lane, London W12 0BZ, England
| | - Richard A. Layfield
- Department
of Chemistry, University of Sussex, Falmer, Brighton BN1 9QR, England
| | - Anthony G. M. Barrett
- Department
of Chemistry, Imperial College, Molecular
Sciences Research Hub, White City Campus, 82 Wood Lane, London W12 0BZ, England
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3
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Kiani P, Dodsworth ES, Lever ABP, Pietro WJ. Modeling ligand electrochemical parameters by repulsion-corrected eigenvalues. J Comput Chem 2021; 42:1236-1242. [PMID: 33870526 DOI: 10.1002/jcc.26536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/22/2021] [Accepted: 03/25/2021] [Indexed: 12/27/2022]
Abstract
Ligand electrochemical parameters, EL , more commonly known as Lever parameters, have played a major research role in understanding redox processes involved in inorganic electrochemistry, enzymatic reactions, catalysis, solar cells, biochemistry, and materials science. Despite their broad usefulness, Lever parameters are not well understood at a first-principles level. Using density functional theory, we demonstrate in this contribution that a ligand's Lever parameter is fundamentally related to the ligand's ability to alter the eigenvalue of the electroactive spin-orbital in an octahedral transition metal complex. Our analysis furthers a first-principles understanding of the nature of Lever parameters.
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Affiliation(s)
- Pirouz Kiani
- Department of Chemistry, York University, Toronto, Ontario, Canada
| | | | - A B P Lever
- Department of Chemistry, York University, Toronto, Ontario, Canada
| | - William J Pietro
- Department of Chemistry, York University, Toronto, Ontario, Canada
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4
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Atencio R, Chacón G, Mendoza L, González T, Bruno-Colmenarez J, Rosales M, Alexander B, Ocando-Mavárez E. Chemistry of transition-metal complexes containing functionalized phosphines: synthesis and structural analysis of rhodium(I) complexes containing allyl and cyanoalkylphosphines. Acta Crystallogr C 2020; 76:932-946. [DOI: 10.1107/s2053229620011420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 08/20/2020] [Indexed: 11/10/2022] Open
Abstract
A series of related acetylacetonate–carbonyl–rhodium compounds substituted by functionalized phosphines has been prepared in good to excellent yields by the reaction of [Rh(acac)(CO)2] (acac is acetylacetonate) with the corresponding allyl-, cyanomethyl- or cyanoethyl-substituted phosphines. All compounds were fully characterized by 31P, 1H, 13C NMR and IR spectroscopy. The X-ray structures of (acetylacetonato-κ2
O,O′)(tert-butylphosphanedicarbonitrile-κP)carbonylrhodium(I), [Rh(C5H7O2)(CO)(C8H13N2)] or [Rh(acac)(CO)(tBuP(CH2CN)2}] (2b), (acetylacetonato-κ2
O,O′)carbonyl[3-(diphenylphosphanyl)propanenitrile-κP]rhodium(I), [Rh(C5H7O2)(C15H14N)(CO)] or [Rh(acac)(CO){Ph2P(CH2CH2CN)}] (2h), and (acetylacetonato-κ2
O,O′)carbonyl[3-(di-tert-butylphosphanyl)propanenitrile-κP]rhodium(I), [Rh(C5H7O2)(C11H22N)(CO)] or [Rh(acac)(CO){tBu2P(CH2CH2CN)}] (2i), showed a square-planar geometry around the Rh atom with a significant trans influence over the acetylacetonate moiety, evidenced by long Rh—O bond lengths as expected for poor π-acceptor phosphines. The Rh—P distances displayed an inverse linear dependence with the coupling constants J
P-Rh and the IR ν(C[triple-bond]O) bands, which accounts for the Rh—P electronic bonding feature (poor π-acceptors) of these complexes. A combined study from density functional theory (DFT) calculations and an evaluation of the intramolecular H...Rh contacts from X-ray diffraction data allowed a comparison of the conformational preferences of these complexes in the solid state versus the isolated compounds in the gas phase. For 2b, 2h and 2i, an energy-framework study evidenced that the crystal structures are mainly governed by dispersive energy. In fact, strong pairwise molecular dispersive interactions are responsible for the columnar arrangement observed in these complexes. A Hirshfeld surface analysis employing three-dimensional molecular surface contours and two-dimensional fingerprint plots indicated that the structures are stabilized by H...H, C...H, H...O, H...N and H...Rh intermolecular interactions.
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Alsalahi W, Trzeciak AM. Hydroformylation of unsaturated esters and 2,3-dihydrofuran under solventless conditions at room temperature catalysed by rhodium N-pyrrolyl phosphine catalysts. NEW J CHEM 2019. [DOI: 10.1039/c9nj04438h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Complexes of the type HRh(CO)L3 (where L is an N-pyrrolyl phosphine, e.g. P(NC4H4)3, Ph(NC4H4)2, or PPh2(NC4H4)) were applied in the hydroformylation of less reactive unsaturated substrates (allyl acetate, butyl acrylate, methyl acrylate, 2,3-dihydrofuran, vinyl acetate).
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Affiliation(s)
- W. Alsalahi
- University of Wrocław
- Faculty of Chemistry
- 50-383 Wrocław
- Poland
| | - A. M. Trzeciak
- University of Wrocław
- Faculty of Chemistry
- 50-383 Wrocław
- Poland
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Mieczyńska E, Grzybek R, Trzeciak AM. Rhodium Pyrrolylphosphine Complexes as Highly Active and Selective Catalysts for Propene Hydroformylation: The Effect of Water and Aldehyde on the Reaction Regioselectivity. ChemCatChem 2017. [DOI: 10.1002/cctc.201700917] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ewa Mieczyńska
- University of Wrocław; Faculty of Chemistry; 14 F. Joliot-Curie St. 50-383 Wrocław Poland
| | - Ryzard Grzybek
- Grupa Azoty, Zakłady Azotowe Kędzierzyn-Koźle S.A.; Mostowa 30A Kędzierzyn-Koźle Poland
| | - Anna M. Trzeciak
- University of Wrocław; Faculty of Chemistry; 14 F. Joliot-Curie St. 50-383 Wrocław Poland
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8
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Kuhn A, Conradie J. Synthesis, electrochemical and DFT study of octahedral bis(β-diketonato)-titanium(IV) complexes. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Erasmus E. Synthesis and electrochemistry of p-substituted phenyl diphenylphosphinite rhodium(I) complexes. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.015] [Citation(s) in RCA: 8] [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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10
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Liu R, Conradie J. Tris(β-diketonato)chromium(III) complexes: Effect of the β-diketonate ligand on the redox properties. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.10.116] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Conradie J. Density functional theory calculations of Rh-β-diketonato complexes. Dalton Trans 2015; 44:1503-15. [PMID: 25429658 DOI: 10.1039/c4dt02268h] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory results on the geometry, energies and charges of selected Rh-β-diketonato reactants, products and transition states.
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Affiliation(s)
- J. Conradie
- Department of Chemistry
- University of the Free State
- 9300 Bloemfontein
- Republic of South Africa
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12
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Ma Z, Wei L, Alegria ECBA, Martins LMDRS, Guedes da Silva MFC, Pombeiro AJL. Synthesis and characterization of copper(II) 4'-phenyl-terpyridine compounds and catalytic application for aerobic oxidation of benzylic alcohols. Dalton Trans 2014; 43:4048-58. [PMID: 24452440 DOI: 10.1039/c3dt53054j] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions between 4'-phenyl-terpyridine (L) and nitrate, acetate or chloride Cu(II) salts led to the formation of [Cu(NO3)2L] (1), [Cu(OCOCH3)2L]·CH2Cl2 (2·CH2Cl2) and [CuCl2L]·[Cu(Cl)(μ-Cl)L]2 (3), respectively. Upon dissolving 1 in mixtures of DMSO-MeOH or EtOH-DMF the compounds [Cu(H2O){OS(CH3)2}L](NO3)2 (4) and [Cu(HO)(CH3CH2OH)L](NO3) (5) were obtained, in this order. Reaction of 3 with AgSO3CF3 led to [CuCl(OSO2CF3)L] (6). The compounds were characterized by ESI-MS, IR, elemental analysis, electrochemical techniques and, for 2-6, also by single crystal X-ray diffraction. They undergo, by cyclic voltammetry, two single-electron irreversible reductions assigned to Cu(II) → Cu(I) and Cu(I) → Cu(0) and, for those of the same structural type, the reduction potential appears to correlate with the summation of the values of the Lever electrochemical EL ligand parameter, which is reported for the first time for copper complexes. Complexes 1-6 in combination with TEMPO (2,2,6,6-tetramethylpiperidinyl-1-oxyl radical) can exhibit a high catalytic activity, under mild conditions and in alkaline aqueous solution, for the aerobic oxidation of benzylic alcohols. Molar yields up to 94% (based on the alcohol) with TON values up to 320 were achieved after 22 h.
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Affiliation(s)
- Zhen Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Guangxi 530004, P. R. China
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14
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Grigoropoulos A, Maganas D, Symeonidis D, Giastas P, Cowley AR, Kyritsis P, Pneumatikakis G. Synthesis of Chalcogenidoimidodiphosphinato–Rh
I
Complexes and DFT Investigation of Their Catalytic Activation in Olefin Hydroformylation. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200921] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexios Grigoropoulos
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Dimitrios Maganas
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
- Max‐Planck Institute for Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany
| | - Dimitrios Symeonidis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Petros Giastas
- Laboratory of Structural and Supramolecular Chemistry, NCSR “Demokritos”, Agia Paraskevi 15310, Athens, Greece
| | - Andrew R. Cowley
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Panayotis Kyritsis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Georgios Pneumatikakis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
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15
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Redox potential parameterization in coordination compounds with polydentate scorpionate and benzene ligands. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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17
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Prediction of chemical and electrochemical oxidation potentials of β-diketonatobis(triphenylphosphite)rhodium(I) complexes: A DFT study. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.06.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Warsink S, Roodt A. (N-Benzoyl-N',N'-diphenyl-thio-ureato-κ(2)S,O)(η(4)-cyclo-octa-1,5-diene)rhodium(I). Acta Crystallogr Sect E Struct Rep Online 2012; 68:m1053-4. [PMID: 22904727 PMCID: PMC3414120 DOI: 10.1107/s1600536812029753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 06/29/2012] [Indexed: 11/10/2022]
Abstract
The title complex, [Rh(C(20)H(15)N(2)OS)(C(8)H(12))], exhibits an essentially square-planar coordination environment around the Rh(I) atom, which bears a bidentate cyclo-octa-diene ligand as well as a monoanionic bidentate benzoyl-thio-ureate ligand. The Rh(I) atom, the S- and O-donor atoms and the alkene centroids of the cyclo-octa-diene ligand do not deviate by more than 0.031 Å from their least mean-squares plane.
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Affiliation(s)
- Stefan Warsink
- 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
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19
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Chen F, Wang GF, Li YZ, Chen XT, Xue ZL. Synthesis and characterization of rhodium(I) and iridium(I) carbonyl phosphine complexes with bis(N-heterocyclic carbene)borate ligands. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Erasmus JJ, Conradie J. Electrochemical study of β-diketonatobis(triphenylphosphite)rhodium(I) complexes. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Chen F, Sun JF, Li TY, Chen XT, Xue ZL. Iridium(I) and Rhodium(I) Carbonyl Complexes with the Bis(3-tert-butylimidazol-2-ylidene)borate Ligand and Unusual B−H Fluorination. Organometallics 2011. [DOI: 10.1021/om200036w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fei Chen
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Jia-Feng Sun
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Tao-Yuan Li
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Xue-Tai Chen
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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22
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Costin S, Rath NP, Bauer EB. Facile one-pot access to a chiral at metal ruthenium pyrrolyl phosphine phosphoramidite complex. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2011.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Man BYW, Bhadbhade M, Messerle BA. Rhodium(i) complexes bearing N-donor ligands: catalytic activity towards intramolecular cyclization of alkynoic acids and ligand lability. NEW J CHEM 2011. [DOI: 10.1039/c1nj20094a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Geier MJ, Vogels CM, Decken A, Westcott SA. Acetylacetonato(phosphane)iridium Complexes: Synthesis and Catalytic Activity in the Cyclization of Alkynoic Acids. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000655] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Hallett AJ, Adams CJ, Anderson KM, Baber RA, Connelly NG, Prime CJ. Homo- and heterodinuclear complexes of the tetrakis(pyrazolyl)borate ligand. Dalton Trans 2010; 39:5899-907. [PMID: 20508889 DOI: 10.1039/c0dt00044b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monometallic complexes of the tetrakis(pyrazolyl)borate ligand [ML(2){B(pz)(4)}] {M = Rh, Ir; L(2) = eta-cod, eta-nbd, (CO)(2), (CO)(PPh(3))} have two free pyrazolyl rings which can be coordinated to a second ML(2) unit to give the dimeric compounds [L(2)M{mu-B(pz)(4)}ML(2)](+), and to a metal halide to give heterobimetallic species [L(2)M{mu-B(pz)(4)}M'Cl(2)]. (1)H NMR spectroscopy shows that [(eta-cod)Rh{mu-B(pz)(4)}Rh(eta-cod)](+) 1(+), [(eta-nbd)Rh{mu-B(pz)(4)}Rh(eta-nbd)](+) 2(+), [(eta-cod)Ir{mu-B(pz)(4)}Ir(eta-cod)](+) 3(+) and [(CO)(2)Rh{mu-B(pz)(4)}Rh(CO)(2)](+) 4(+) are fluxional at room temperature. Cooling a solution of [(eta-cod)Rh{mu-B(pz)(4)}Rh(eta-cod)](+) 1(+) to -90 degrees C slows the fluxional process, which involves inversion of the two B-(N-N)(2)-M six-membered rings. Attempts to synthesise the asymmetric complexes [(eta-cod)Rh{mu-B(pz)(4)}Rh(eta-nbd)](+) 7(+), [(eta-cod)Rh{mu-B(pz)(4)}Ir(eta-cod)](+) 8(+) and [(eta-cod)Rh{mu-B(pz)(4)}Rh(CO)(2)](+) 9(+) produced a mixture of [L(2)M{mu-B(pz)(4)}ML(2)](+), [L'(2)M'{mu-B(pz)(4)}M'L'(2)](+) and the desired species. The heterobimetallic complexes [L(2)Rh{mu-B(pz)(4)}M'Cl(2)] (M' = Co, L(2) = eta-cod 10; M' = Co, L(2) = eta-nbd 11; M' = Co, L = CO 12; M' = Co, L(2) = (CO)(PPh(3)) 13; M' = Zn, L(2) = eta-cod 14; M' = Zn, L(2) = eta-nbd 15; M' = Pd, L(2) = eta-cod 16) possess square planar Rh(I) linked to square planar Pd(II) or tetrahedral Zn(II) and Co(II) centres. The paramagnetic Co(II) complexes give (1)H NMR spectra with signals shifted over a range of 75 ppm. The UV-Vis spectra of 10-13 show four bands, one MLCT at Rh and three d-d transitions arising from the splitting of the (4)T(1)(P) excited state due to approximate C(2v) symmetry at Co.
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Affiliation(s)
- Andrew J Hallett
- School of Chemistry, University of Bristol, Bristol, UK BS8 1TS.
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26
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Dinoi C, Guedes da Silva MFC, Alegria ECBA, Smoleński P, Martins LMDRS, Poli R, Pombeiro AJL. Molybdenum Complexes Bearing the Tris(1-pyrazolyl)methanesulfonate Ligand: Synthesis, Characterization and Electrochemical Behaviour. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Brink A, Roodt A, Steyl G, Visser HG. Steric vs. electronic anomaly observed from iodomethane oxidative addition to tertiary phosphine modified rhodium(i) acetylacetonato complexes following progressive phenyl replacement by cyclohexyl [PR3 = PPh3, PPh2Cy, PPhCy2 and PCy3]. Dalton Trans 2010; 39:5572-8. [PMID: 20480082 DOI: 10.1039/b922083f] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Alice Brink
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
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Smoleński P, Dinoi C, Guedes da Silva MC, Pombeiro AJ. Synthesis of the water-soluble [Rh(Tpms)(CO)(PTA)] compound, the first transition metal complex bearing the 1,3,5-triaza-7-phosphaadamantane (PTA) and the tris(1-pyrazolyl)methanesulfonate (Tpms) ligands. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.04.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Aromí G, Gamez P, Reedijk J. Poly beta-diketones: Prime ligands to generate supramolecular metalloclusters. Coord Chem Rev 2008. [DOI: 10.1016/j.ccr.2007.07.008] [Citation(s) in RCA: 144] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Crossley IR. The Organometallic Chemistry of Group 9 Poly(pyrazolyl)borate Complexes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2008. [DOI: 10.1016/s0065-3055(07)56004-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Chatziapostolou KA, Vallianatou KA, Grigoropoulos A, Raptopoulou CP, Terzis A, Kostas ID, Kyritsis P, Pneumatikakis G. Synthesis and characterization of new RhI complexes bearing CO, PPh3 and chelating P,O- or Se,Se-ligands: Application to hydroformylation of styrene. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.06.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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About the different reactivity of dinuclear palladium and platinum compounds with trispyrrolylphosphine: Synthesis and X-ray crystallographic results of new palladium complexes containing P–pyrrolyl bonds. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.05.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pombeiro AJL. Characterization of Coordination Compounds by Electrochemical Parameters. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601095] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Armando J. L. Pombeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049‐001 Lisboa, Portugal
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Bolaño S, Albinati A, Bravo J, Gonsalvi L, Peruzzini M. Borane adducts of the water soluble phosphine PTA (PTA=1,3,5-triaza-7-phosphaadamantane). INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Electron-donor/acceptor properties of carbynes, carbenes, vinylidenes, allenylidenes and alkynyls as measured by electrochemical ligand parameters. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.07.111] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Application of transition metals in hydroformylation annual survey covering the year 2004. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2005.02.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Trzeciak AM, Štěpnička P, Mieczyńska E, Ziółkowski JJ. Rhodium(I) complexes with 1′-(diphenylphosphino)ferrocenecarboxylic acid as active and recyclable catalysts for 1-hexene hydroformylation. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.02.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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