1
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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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2
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Mlateček M, Dostál L, Růžičková Z, Honzíček J, Holubová J, Erben M. The first scorpionate ligand based on diazaphosphole. Dalton Trans 2015; 44:20242-53. [PMID: 26537349 DOI: 10.1039/c5dt03589a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of PhBCl2 with 1H-1,2,4-λ(3)-diazaphosphole in the presence of NEt3 gives a new scorpionate ligand, phenyl-tris(1,2,4-diazaphospholyl)borate (PhTdap). The coordination behaviour of this ligand toward transition and non-transition metals has been comprehensively studied. In the thallium(I) complex, Tl(PhTdap), κ(2)-N,N bonding supported with intramolecular η(3)-phenyl coordination has been observed in the solid state. Tl(PhTdap) also shows unusual intermolecular π-interactions between five-membered diazaphosphole rings and the thallium atom giving infinite molecular chains in the crystal. In the square planar complex [Pd(C,N-C6H4CH2NMe2)(PhTdap)], κ(2)-bonded scorpionate has been detected in both solution and in the solid state. For other studied compounds with the central metal ion Ti(IV), Mo(II), Mn(I), Fe(II), Ru(II), Co(II), Co(III), Ni(II) and Cd(II), the κ(3)-N,N,N coordination pattern was observed. Electronic properties of PhTdap and its ligand-field strength were elucidated from UV-Vis spectra of transition-metal species. The CH/P replacement on going from tris(pyrazolyl)borate to the ligand PhTdap causes a slight increase in electronic density rendered to the central metal atom. The following order of ligand-field strength has been established: HB(3,5-Me2pz)3 < PhB(pz)3 < HB(1,2,4-triazolyl) < HB(pz)3 < PhB(1,2,4-triazolyl) < PhTdap. The crystal structures of ten metal complexes bearing the new ligand are reported. The possibility of PhTdap coordination through the phosphorus atom is also briefly discussed.
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Affiliation(s)
- Martin Mlateček
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Czech Republic
| | - Jan Honzíček
- Institute of Chemistry and Technology of Macromolecular Materials, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic.
| | - Jana Holubová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Czech Republic
| | - Milan Erben
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Czech Republic
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Morales D, Puerto M, del Río I, Pérez J, López R. Interaction between Anions and Molybdenum Allyl Dicarbonyl Complexes of 1,4,7-Trithiacyclononane. Chemistry 2012; 18:16186-95. [DOI: 10.1002/chem.201201327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 07/04/2012] [Indexed: 11/12/2022]
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Marchetti F, Pettinari C, Pettinari R, Cerquetella A, Martins LMDRS, Guedes da Silva MFC, Silva TFS, Pombeiro AJL. Ruthenium(II) Arene Complexes Bearing Tris(pyrazolyl)methanesulfonate Capping Ligands. Electrochemistry, Spectroscopic, and X-ray Structural Characterization. Organometallics 2011. [DOI: 10.1021/om200713v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Fabio Marchetti
- School of Science & Technology, University of Camerino, S. Agostino 1, 62032 Camerino, Italy
| | - Claudio Pettinari
- School of Pharmacy, University of Camerino, S. Agostino 1, 62032 Camerino,
Italy
| | - Riccardo Pettinari
- School of Pharmacy, University of Camerino, S. Agostino 1, 62032 Camerino,
Italy
| | - Adele Cerquetella
- School of Pharmacy, University of Camerino, S. Agostino 1, 62032 Camerino,
Italy
| | - Luísa M. D. R. S. Martins
- Centro de Química
Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Avenida Rovisco Pais, 1049-001
Lisboa, Portugal
- Área
Departamental de
Engenharia Química, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emídio Navarro, 1059-007,
Lisboa, Portugal
| | - M. Fátima C. Guedes da Silva
- Centro de Química
Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Avenida Rovisco Pais, 1049-001
Lisboa, Portugal
- Universidade Lusófona de Humanidades e Tecnologias, ULHT Lisbon, Campo Grande
376, 1749-024 Lisboa, Portugal
| | - Telma F. S. Silva
- Centro de Química
Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Avenida Rovisco Pais, 1049-001
Lisboa, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química
Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Avenida Rovisco Pais, 1049-001
Lisboa, Portugal
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Pettinari C, Marchetti F, Lupidi G, Quassinti L, Bramucci M, Petrelli D, Vitali LA, da Silva MFCG, Martins LMDRS, Smoleński P, Pombeiro AJL. Synthesis, antimicrobial and antiproliferative activity of novel silver(I) tris(pyrazolyl)methanesulfonate and 1,3,5-triaza-7-phosphadamantane complexes. Inorg Chem 2011; 50:11173-83. [PMID: 21999582 DOI: 10.1021/ic201714c] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Five new silver(I) complexes of formulas [Ag(Tpms)] (1), [Ag(Tpms)(PPh(3))] (2), [Ag(Tpms)(PCy(3))] (3), [Ag(PTA)][BF(4)] (4), and [Ag(Tpms)(PTA)] (5) {Tpms = tris(pyrazol-1-yl)methanesulfonate, PPh(3) = triphenylphosphane, PCy(3) = tricyclohexylphosphane, PTA = 1,3,5-triaza-7-phosphaadamantane} have been synthesized and fully characterized by elemental analyses, (1)H, (13)C, and (31)P NMR, electrospray ionization mass spectrometry (ESI-MS), and IR spectroscopic techniques. The single crystal X-ray diffraction study of 3 shows the Tpms ligand acting in the N(3)-facially coordinating mode, while in 2 and 5 a N(2)O-coordination is found, with the SO(3) group bonded to silver and a pendant free pyrazolyl ring. Features of the tilting in the coordinated pyrazolyl rings in these cases suggest that this inequivalence is related with the cone angles of the phosphanes. A detailed study of antimycobacterial and antiproliferative properties of all compounds has been carried out. They were screened for their in vitro antimicrobial activities against the standard strains Enterococcus faecalis (ATCC 29922), Staphylococcus aureus (ATCC 25923), Streptococcus pneumoniae (ATCC 49619), Streptococcus pyogenes (SF37), Streptococcus sanguinis (SK36), Streptococcus mutans (UA159), Escherichia coli (ATCC 25922), and the fungus Candida albicans (ATCC 24443). Complexes 1-5 have been found to display effective antimicrobial activity against the series of bacteria and fungi, and some of them are potential candidates for antiseptic or disinfectant drugs. Interaction of Ag complexes with deoxyribonucleic acid (DNA) has been studied by fluorescence spectroscopic techniques, using ethidium bromide (EB) as a fluorescence probe of DNA. The decrease in the fluorescence of DNA-EB system on addition of Ag complexes shows that the fluorescence quenching of DNA-EB complex occurs and compound 3 is particularly active. Complexes 1-5 exhibit pronounced antiproliferative activity against human malignant melanoma (A375) with an activity often higher than that of AgNO(3), which has been used as a control, following the same order of activity inhibition on DNA, i.e., 3 > 2 > 1 > 5 > AgNO(3)≫ 4.
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Affiliation(s)
- Claudio Pettinari
- School of Pharmacy, Università degli Studi di Camerino, via S Agostino 1, 62032 Camerino MC, Italy.
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Harrison DP, Nichols-Nielander AC, Zottig VE, Strausberg L, Salomon RJ, Trindle CO, Sabat M, Gunnoe TB, Iovan DA, Myers WH, Harman WD. Hyperdistorted Tungsten Allyl Complexes and Their Stereoselective Deprotonation to Form Dihapto-Coordinated Dienes. Organometallics 2011. [DOI: 10.1021/om200183m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Daniel P. Harrison
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | | | - Victor E. Zottig
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Laura Strausberg
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Rebecca J. Salomon
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Carl O. Trindle
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Michal Sabat
- Nanoscale Materials Characterization Facility, Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diana A. Iovan
- Department of Chemistry, University of Richmond, Richmond, Virginia 27173, United States
| | - William H. Myers
- Department of Chemistry, University of Richmond, Richmond, Virginia 27173, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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Paredes P, López-Calzada A, Miguel D, Villafañe F. Tetranuclear organometallic complexes containing Mo2O42+ and allylmolybdenum(ii) moieties. Dalton Trans 2010; 39:10099-104. [DOI: 10.1039/c0dt00570c] [Citation(s) in RCA: 9] [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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8
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Arroyo M, García-de-Prada MT, García-Martín C, García-Pacios V, García-Rodríguez R, Gómez-Iglesias P, Lorenzo F, Martín-Moreno I, Miguel D, Villafañe F. fac-Acetato-bis(pyrazole) complexes: A systematic study on intra- and intermolecular hydrogen bonds. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Niikura F, Seino H, Mizobe Y. Preparation, Structures, and Some Reactivities of Five-Coordinate Alkyne Complexes of Mo with Tetraphosphine or Diphosphine Coligand [Mo(RC≡CR′){meso-o-C6H4(PPhCH2CH2PPh2)2}] and [Mo(RC≡CR′)(Ph2PCH2CH2PPh2)2]. Organometallics 2009. [DOI: 10.1021/om800615a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fumiya Niikura
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Hidetake Seino
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yasushi Mizobe
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
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11
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Wanke R, Smoleński P, da Silva MFCG, Martins LMDRS, Pombeiro AJL. Cu(I) complexes bearing the new sterically demanding and coordination flexible tris(3-phenyl-1-pyrazolyl)methanesulfonate ligand and the water-soluble phosphine 1,3,5-triaza-7-phosphaadamantane or related ligands. Inorg Chem 2008; 47:10158-68. [PMID: 18841929 DOI: 10.1021/ic801254b] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The new sterically hindered scorpionate tris(3-phenylpyrazolyl)methanesulfonate (Tpms(Ph))(-) has been synthesized and its coordination behavior toward a Cu(I) center, in the presence of 1,3,5-triaza-7-phosphaadamantane (PTA), N-methyl-1,3,5-triaza-7-phosphaadamantane tetraphenylborate ((mPTA)[BPh4]) or hexamethylenetetramine (HMT) has been studied. The reaction between Li(Tpms(Ph)) (1) and [Cu(MeCN)4][PF6] yields [Cu(Tpms(Ph))(MeCN)] (2) which, upon further acetonitrile displacement on reaction with PTA, HMT, or (mPTA)[BPh4], gives the corresponding complexes [Cu(Tpms(Ph))(PTA)] (3), [Cu(Tpms(Ph))(HMT)] (4), and [Cu(Tpms(Ph))(mPTA)][PF6] (5). All the compounds have been characterized by (1)H, (31)P, (13)C, COSY or HMQC-NMR, IR, elemental analysis, and single crystal X-ray diffraction. In the complexes (3) and (5), which bear a phosphine ligand (i.e., PTA and mPTA, respectively), the new scorpionate ligand shows the typical N, N, N-coordination mode, whereas in (2) and (4), bearing a N-donor ligand (i.e., MeCN and HMT, respectively), it binds the metal via the N,N,O chelating mode, involving the sulfonate moiety.
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Affiliation(s)
- Riccardo Wanke
- Centro de Quimica Estrutural, Complexo I, Instituto Superior Tecnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
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12
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Tsang JYK, Buschhaus MSA, Fujita-Takayama C, Patrick BO, Legzdins P. Different Modes of Reactivity of Cp*W(NO)(alkyl)(η3-allyl) Complexes with Cyclic Amines: The Influence of the Allyl Ligands. Organometallics 2008. [DOI: 10.1021/om701236k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jenkins Y. K. Tsang
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Miriam S. A. Buschhaus
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Chikako Fujita-Takayama
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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13
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Tsang JYK, Buschhaus MSA, Graham PM, Semiao CJ, Semproni SP, Kim SJ, Legzdins P. Facile and Selective Aliphatic C−H Bond Activation at Ambient Temperatures Initiated by Cp*W(NO)(CH2CMe3)(η3-CH2CHCHMe). J Am Chem Soc 2008; 130:3652-63. [DOI: 10.1021/ja710606v] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jenkins Y. K. Tsang
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Miriam S. A. Buschhaus
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter M. Graham
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Christopher J. Semiao
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Scott P. Semproni
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Simon J. Kim
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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Kisała J, Białońska A, Ciunik Z, Kurek S, Wołowiec S. Complexes of heteroscorpionate trispyrazolylborate ligands. Part XIII: Molybdenum complexes of hydrobis(5-methyl-3-phenylpyrazolyl)(3-methyl-5-phenylpyrazolyl)borate, hydrotris(3-(2-thienyl)-5-methylpyrazolyl)borate and tetranuclear molybdenum(V) complex of hydrotris(3,5-dimethylpyrazolyl)borate. Polyhedron 2006. [DOI: 10.1016/j.poly.2006.05.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Reger DL, Elgin JD, Smith MD, Grandjean F, Rebbouh L, Long GJ. Structural identification of the factors that prevent an electronic spin-state crossover in Fe[(C6H5)B(3-Mepz)3]2 (pz=pyrazolyl ring). Polyhedron 2006. [DOI: 10.1016/j.poly.2006.03.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Reger DL, Gardinier JR, Elgin JD, Smith MD, Hautot D, Long GJ, Grandjean F. Structure−Function Correlations in Iron(II) Tris(pyrazolyl)borate Spin-State Crossover Complexes. Inorg Chem 2006; 45:8862-75. [PMID: 17054344 DOI: 10.1021/ic0607437] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iron(II) poly(pyrazolyl)borate complexes have been investigated to determine the impact of substituent effects, intramolecular ligand distortions, and intermolecular supramolecular structures on the spin-state crossover (SCO) behavior. The molecular structure of Fe[HB(3,4,5-Me3pz)3]2 (pz = pyrazolyl ring), a complex known to remain high spin when the temperature is lowered, reveals that this complex has an intramolecular ring-twist distortion that is not observed in analogous complexes that do exhibit a SCO at low temperatures, thus indicating that this distortion greatly influences the properties of these complexes. The structure of Fe[B(3-(cy)Prpz)4]2.(CH3OH) ((cy)Pr = cyclopropyl ring) at 294 K has two independent molecules in the unit cell, both of which are high spin; only one of these high-spin iron(II) sites, the site with the lesser ring-twist distortion, is observed to be low-spin iron(II) in the 90 K structure. A careful evaluation of the supramolecular structures of these complexes and several similar complexes reported previously revealed no strong correlation between the supramolecular packing forces and their SCO behavior. Magnetic and Mössbauer spectral measurements on Fe[B(3-(cy)Prpz)4]2 and Fe[HB(3-(cy)Prpz)3]2 indicate that both complexes exhibit a partial SCO from fully high-spin iron(II) at higher temperatures, respectively, to a 50:50 high-spin/low-spin mixture of iron(II) below 100 K. These results may be understood, in the former case, by the differences in ring-twisting and, in the latter case, by a phase transition; in all complexes in which a phase transition is observed, this change dominates the SCO behavior. A comparison of the Mössbauer spectral properties of these two complexes and of Fe[HB(3-Mepz)3]2 with that of other complexes reveals correlations between the Mössbauer-effect isomer shift and the average Fe-N bond distance and between the quadrupole splitting and the average FeN-NB intraligand dihedral torsion angles and the distortion of the average N-Fe-N intraligand bond angles.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
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Helfer DS, Phaho DS, Atwood JD. Formation of [Pt(η3-allyl)(TPPTS)2]+ from Reaction of cis-Pt(Cl)2(TPPTS)2 with Alkenols in Water. Organometallics 2005. [DOI: 10.1021/om050540a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Derrik S. Helfer
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000
| | - David S. Phaho
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000
| | - Jim D. Atwood
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000
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18
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Ipaktschi J, Rooshenas P, Dülmer A. Reaction of Tungsten Vinylcarbene Complexes with Enamines. Organometallics 2005. [DOI: 10.1021/om050610d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junes Ipaktschi
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
| | - Parham Rooshenas
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
| | - Ansgar Dülmer
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
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Vogeley NJ, White PS, Templeton JL. Diastereoselective Hydride Addition to [Tp‘W(CO)(PhCCMe)(NHCRR‘)][BAr‘4]: Effects of Equilibrium and Kinetic Acidity. Organometallics 2004. [DOI: 10.1021/om0344022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Neil J. Vogeley
- W. R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - Peter S. White
- W. R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - Joseph L. Templeton
- W. R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
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Ng SHK, Adams CS, Hayton TW, Legzdins P, Patrick BO. Thermal Activation of Hydrocarbon C−H Bonds Initiated by a Tungsten Allyl Complex. J Am Chem Soc 2003; 125:15210-23. [PMID: 14653756 DOI: 10.1021/ja037076q] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gentle thermolysis of the allyl complex, CpW(NO)(CH(2)CMe(3))(eta(3)-H(2)CCHCMe(2)) (1), at 50 degrees C in neat hydrocarbon solutions results in the loss of neopentane and the generation of transient intermediates that subsequently activate solvent C-H bonds. Thus, thermal reactions of 1 with tetramethylsilane, mesitylene, and benzene effect single C-H activations and lead to the exclusive formation of CpW(NO)(CH(2)SiMe(3))(eta(3)-H(2)CCHCMe(2)) (2), CpW(NO)(CH(2)C(6)H(3)-3,5-Me(2))(eta(3)-H(2)CCHCMe(2)) (3), and CpW(NO)(C(6)H(5))(eta(3)-H(2)CCHCMe(2)) (4), respectively. The products of reactions of 1 with other methyl-substituted arenes indicate an inherent preference of the system for the activation of stronger arene sp(2) C-H bonds. For example, C-H bond activation of p-xylene leads to the formation of CpW(NO)(CH(2)C(6)H(4)-4-Me)(eta(3)-H(2)CCHCMe(2)) (5) (26%) and CpW(NO)(C(6)H(3)-2,5-Me(2))(eta(3)-H(2)CCHCMe(2)) (6) (74%). Mechanistic and labeling studies indicate that the transient C-H-activating intermediates are the allene complex, CpW(NO)(eta(2)-H(2)C=C=CMe(2)) (A), and the eta(2)-diene complex, CpW(NO)(eta(2)-H(2)C=CHC(Me)=CH(2)) (B). Intermediates A and B react with cyclohexene to form CpW(NO)(eta(3)-CH(2)C(2-cyclohexenyl)CMe(2))(H) (18) and CpW(NO)(eta(3)-CH(2)CHC)(Me)CH(2)C(beta)H(C(4)H(8))C(alpha)H (19), respectively, and intermediate A can be isolated as its PMe(3) adduct, CpW(NO)(PMe(3))(eta(2)-H(2)C=C=CMe(2)) (20). Interestingly, thermal reaction of 1 with 2,3-dimethylbut-2-ene results in the formation of a species that undergoes eta(3) --> eta(1) isomerization of the dimethylallyl ligand following the initial C-H bond-activating step to yield CpW(NO)(eta(3)-CMe(2)CMeCH(2))(eta(1)-CH(2)CHCMe(2)) (21). Thermolyses of 1 in alkane solvents afford allyl hydride complexes resulting from three successive C-H bond-activation reactions. For instance, 1 in cyclohexane converts to CpW(NO)(eta(3)-C(6)H(9))(H) (22) with dimethylpropylcyclohexane being formed as a byproduct, and in methylcyclohexane it forms the two isomeric complexes, CpW(NO)(eta(3)-C(7)H(11))(H) (23a,b). All new complexes have been characterized by conventional spectroscopic methods, and the solid-state molecular structures of 2, 3, 4, 18, 19, 20, and 21 have been established by X-ray crystallographic analyses.
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Affiliation(s)
- Stephen H K Ng
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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21
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Lantero DR, Glenn AG, Day CS, Welker ME. Preparation and Characterization of Molybdenum Tris(pyrazolyl)borate Dicarbonyl η3-Dienyl Complexes. Organometallics 2003. [DOI: 10.1021/om030114u] [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]
Affiliation(s)
- Dean R. Lantero
- Departments of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, and Guilford College, 5800 West Friendly Avenue, Greensboro, North Carolina 27410
| | - Anne G. Glenn
- Departments of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, and Guilford College, 5800 West Friendly Avenue, Greensboro, North Carolina 27410
| | - Cynthia S. Day
- Departments of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, and Guilford College, 5800 West Friendly Avenue, Greensboro, North Carolina 27410
| | - Mark E. Welker
- Departments of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, and Guilford College, 5800 West Friendly Avenue, Greensboro, North Carolina 27410
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22
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Paredes P, Miguel D, Villafañe F. Synthesis of (η3-Allyl)bromodicarbonylbis(pyrazole)molybdenum(II) and Reactivity towards [Au(acac)PPh3]: Structure and Dynamic Behavior of the Monometallic Pyrazole and Heterometallic Pyrazolate Complexes. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200390132] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Pérez J, Riera V, Rodríguez A, López R, Sordo TL, García-Granda S, García-Rodríguez E, Galindo A. Structural Divergence in the Products of the Reaction of [MoCl(η3-C3H5)(CO)2(dmpm)] with Nucleophiles. Organometallics 2003. [DOI: 10.1021/om020919m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julio Pérez
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Víctor Riera
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Amor Rodríguez
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Ramón López
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Tomás L. Sordo
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Santiago García-Granda
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Esther García-Rodríguez
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
| | - Agustín Galindo
- Departamento de Química Orgánica e Inorgánica-IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
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24
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Limberg C, Hunger M, Habicht W, Kaifer E. Synthesis of heterometallic bismuth/molydenum alkoxides and their behavior on silica surfaces. Inorg Chem 2002; 41:3359-65. [PMID: 12079453 DOI: 10.1021/ic011252j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of [(C(3)H(5))Mo(CO)(2)(CH(3)CN)(2)Cl], 2, with [Bi(OCH(2)CH(2)OCH(3))(3)](2) on a large scale leads to the novel molybdenum/bismuth alkoxide [(C(3)H(5))Mo(CO)(2)(mu-kappa O,2 kappa O'-OCH(2)CH(2)OCH(3))(2)(mu-kappa O-OCH(2)CH(2)OCH(3))BiCl], 6, as the main product as well as to [(C(3)H(5))Mo(CO)(2)(mu-kappa O,2 kappa O'-OCH(2)CH(2)OCH(3))(2)(mu-Cl)BiCl], 4, as a byproduct. Both compounds were characterized by elemental analysis, IR, and NMR spectroscopy as well as by X-ray diffraction. If 6 is brought into contact with a large excess of silica gel, aggregation and condensation reactions are initiated, which led to clusters of ca. 200 nm size spread over the silica surface. When the resulting material is calcinated at 350 degrees C in the presence of O(2), all organic ligands are eliminated and the metal oxo units rearrange: SEM/EDX measurements showed afterward Mo-free bismuth oxo clusters with sizes between 30 and 1000 nm, which are distributed together with molybdenum oxo particles of lower nuclearity over the silica surface. If such a material is employed as a potential catalyst for the propene oxidation under technical conditions, no activity is observed. If, however, the process is performed under very low pressures, a conversion of 5% is found. This result is discussed in the context of the mechanism proposed for the technical oxidation of propene to acrolein on bismuthmolybdate catalysts.
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Affiliation(s)
- Christian Limberg
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120, Heidelberg, Germany.
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25
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Morales D, Pérez J, Riera L, Riera V, Corzo-Suárez R, García-Granda S, Miguel D. An Easily Accessed Molybdenum Lewis Acid as a Catalyst for Imine Aziridination. Organometallics 2002. [DOI: 10.1021/om010958i] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dolores Morales
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Julio Pérez
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Lucía Riera
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Víctor Riera
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Raúl Corzo-Suárez
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Santiago García-Granda
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Daniel Miguel
- Departamento de Química Orgánica e Inorgánica/IUQOEM and Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
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26
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Ascenso J, de Azevedo C, Calhorda M, de C.T. Carrondo M, Costa P, Dias A, Drew M, Félix V, Galvão A, Romão C. Synthesis, bonding and dynamic behavior of fac-[Mo(II)(CO)2(η3-allyl)] derivatives. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(01)00988-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Sadimenko AP. Organometallic Complexes of Pyrazolylborates and Related Ligands. ADVANCES IN HETEROCYCLIC CHEMISTRY 2001. [DOI: 10.1016/s0065-2725(01)81012-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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28
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Jepsen AS, Vogeley NJ, White PS, Templeton JL. X-ray structure and electrophilic reactivity of a cationic, chiral tungsten(II) methylene complex. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(00)00708-7] [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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29
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30
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Structure and Dynamic Behavior of (η3-Allyl)bromodicarbonylmolybdenum(II) Complexes Containing Polydentate 2-Pyridylphosphanes or Their Oxides as Chelating Ligands: Occurrence of Three Fluxional Processes. Eur J Inorg Chem 2000. [DOI: 10.1002/(sici)1099-0682(200005)2000:5<1031::aid-ejic1031>3.0.co;2-d] [Citation(s) in RCA: 51] [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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31
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Frohnapfel DS, White PS, Templeton JL. Insertion Products from Photolysis of Tp‘(CO)3WH and Alkynes. Organometallics 2000. [DOI: 10.1021/om9910165] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David S. Frohnapfel
- W. R. Kenan Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27514
| | - Peter S. White
- W. R. Kenan Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27514
| | - Joseph L. Templeton
- W. R. Kenan Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27514
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32
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Hunger M, Limberg C, Kircher P. Syntheses of Heteronuclear Molybdenum/Bismuth Alkoxides Stabilized by Organic Ligands. Organometallics 2000. [DOI: 10.1021/om9908229] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marc Hunger
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg
| | - Christian Limberg
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg
| | - Peter Kircher
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg
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33
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Frohnapfel DS, Enriquez AE, Templeton JL. Synthesis and β‘-Site Deprotonation/Alkylation Reactions of Tp‘(CO)2W(η2-vinyl) Complexes. Organometallics 2000. [DOI: 10.1021/om990574g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David S. Frohnapfel
- W.R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27514
| | - Alejandro E. Enriquez
- W.R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27514
| | - Joseph L. Templeton
- W.R. Kenan Laboratory, Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27514
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34
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Borgmann C, Limberg C, Kaifer E, Pritzkow H, Zsolnai L. Syntheses and X-ray structures of complexes with (η3-allyl)Mo-units in oxygen-rich coordination spheres. J Organomet Chem 1999. [DOI: 10.1016/s0022-328x(98)01149-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Frohnapfel DS, Reinartz S, White PS, Templeton JL. Electrophilic Addition to Cyanide Ligands in Tungsten(II) Four-Electron-Donor Alkyne Complexes. Organometallics 1998. [DOI: 10.1021/om980127l] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David S. Frohnapfel
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Stefan Reinartz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Peter S. White
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Joseph L. Templeton
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
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36
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Woodworth BE, Frohnapfel DS, White PS, Templeton JL. Formation of Derivative Carbyne Complexes from Tp‘(CO)2M⋮CCH3 (M = Mo, W). Organometallics 1998. [DOI: 10.1021/om9708992] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. E. Woodworth
- W. R. Kenan, Jr., Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - D. S. Frohnapfel
- W. R. Kenan, Jr., Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - P. S. White
- W. R. Kenan, Jr., Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - J. L. Templeton
- W. R. Kenan, Jr., Laboratory, Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27599-3290
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