1
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Netam KD, Pal AK, Nethaji M, Jagirdar BR. Agostic interaction versus small molecule binding in [RuH(CO)(PPhNiPrPPh)]BAr4F complex. J Organomet Chem 2023. [DOI: 10.1016/j.jorganchem.2023.122693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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2
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Eder W, Himmelbauer D, Stöger B, Veiros LF, Pignitter M, Kirchner K. Manganese and iron PCP pincer complexes - the influence of sterics on structure and reactivity. Dalton Trans 2021; 50:13915-13924. [PMID: 34528031 DOI: 10.1039/d1dt02407h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of various manganese and iron PCP pincer complexes via a solvothermal oxidative addition methodology is described. Upon reacting [Mn2(CO)10] with the ligands (P(C-Br)PCH2-iPr) (1a) and (P(C-Br)PO-iPr) (1b), Mn(I) PCP pincer complexes [Mn(PCPCH2-iPr)(CO)3] (2a) and [Mn(-PCPO-iPr)(CO)3] (2b) were obtained. Protonation of 2a with HBF4·Et2O led to the formation of [Mn(κ3P,CH,P-P(CH)PCH2-iPr)(CO)3]BF4 (3) featuring an η2-Caryl-H agostic bond. The solvothermal reaction of 1a with [Fe2(CO)9] afforded the Fe(II) PCP pincer complex [Fe(PCPCH2-iPr)(CO)2Br] (4). Treatment of 4 with Li[HBEt3] afforded the Fe(I) complex [Fe(PCPCH2-iPr)(CO)2] (5a). When using the sterically more demanding ligands (P(C-Br)PCH2-tBu) (1c) and (P(C-Br)PO-tBu)(1d) striking differences in reactivity were observed. While neither 1c nor 1d showed any reactivity towards [Mn2(CO)10], the reaction with [Fe2(CO)9] and [Fe(CO)5] led to the formation of the Fe(I) complexes [Fe(PCPCH2-tBu)(CO)2] (5b) and [Fe(PCPO-tBu)(CO)2] (5c). X-ray structures of representative complexes are provided.
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Affiliation(s)
- Wolfgang Eder
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
| | - Daniel Himmelbauer
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
| | - Berthold Stöger
- X-Ray Center, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Luis F Veiros
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais No. 1, 1049-001 Lisboa, Portugal
| | - Marc Pignitter
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
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3
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Wiedmaier NR, Schubert H, Mayer HA, Wesemann L. Carbocyclic pincer carbene complexes of ruthenium: syntheses and reversible hydrogenation. Dalton Trans 2021; 50:11814-11820. [PMID: 34369545 DOI: 10.1039/d1dt02266k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ruthenium carbene pincer complex 2 was synthesized treating the benzo annulated cycloheptatriene bisphosphine 1 with RuCl3. Addition of three equivalents of hydrogen to the carbocyclic carbene complex 2 was achieved in reaction of 2 with hydrogen at elevated temperatures. Hydrogenated complex 4, exhibiting a rigid chair conformation in solution, was dehydrogenated by heating a toluene solution of complex 4 to reflux for 5-7 d. In reaction with ethylene, complex 4 transfers one equivalent of hydrogen, forming ethane and alkyl complex 5.
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Affiliation(s)
- Nicholas R Wiedmaier
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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4
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Wiedmaier NR, Speth H, Leistikow G, Eichele K, Schubert H, Mayer HA, Wesemann L. Conformation controlled stepwise hydride shuffling from the metal to the ligand backbone. Dalton Trans 2020; 49:7218-7227. [DOI: 10.1039/d0dt01431a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The protonation of the benzo annulated cycloheptatriene PCP pincer ruthenium hydrido dicarbonyl complex using the superacid [H(Et2O)2][BArF24] launches a cascade of hydride shifts which lead to the hydrogenation of the ligand backbone.
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Affiliation(s)
| | - Hansjörg Speth
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Georg Leistikow
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Klaus Eichele
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Hermann A. Mayer
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Lars Wesemann
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
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5
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Almeida NMS, Ariyarathna IR, Miliordos E. O-H and C-H Bond Activations of Water and Methane by RuO 2+ and (NH 3)RuO 2+: Ground and Excited States. J Phys Chem A 2019; 123:9336-9344. [PMID: 31580075 DOI: 10.1021/acs.jpca.9b05910] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Investigation of the ground and excited states of RuO2+ is carried out using multireference quantum chemical methodologies. The electronic structure is explored in detail, and accurate spectroscopic constants for 12 states are reported. Although ruthenium belongs to the same group as iron, the ground state of RuO2+ is 1Σ+ with a strong oxo character as opposed to the 3Δ of FeO2+ with primarily oxyl character. To see the effect of the different electronic structure of RuO2+ on the O-H and C-H bond activation processes, we studied its reaction with one water or methane molecule. Reaction energies and activation barriers are given for six low-lying electronic states of singlet, triplet, and quintet spin multiplicities. It is found that the higher-energy quintet state (5Σ+) provides the lowest activation energies and is the same state responsible for the C-H activation for FeO2+ complexes. The reason is attributed to its weaker metal-oxygen bond (longer bond length), which is "prepared" to be activated at the same time with the O-H and C-H bonds. The effect of an ammonia ligand in the chemical activity is also discussed.
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Affiliation(s)
- Nuno M S Almeida
- Department of Chemistry and Biochemistry , Auburn University , Auburn , Alabama 36849-5312 , United States
| | - Isuru R Ariyarathna
- Department of Chemistry and Biochemistry , Auburn University , Auburn , Alabama 36849-5312 , United States
| | - Evangelos Miliordos
- Department of Chemistry and Biochemistry , Auburn University , Auburn , Alabama 36849-5312 , United States
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6
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Nakashige ML, Loristo JIP, Wong LS, Gurr JR, O'Donnell TJ, Yoshida WY, Rheingold AL, Hughes RP, Cain MF. E-Selective Synthesis and Coordination Chemistry of Pyridine-Phosphaalkenes: Five Ligands Produce Four Distinct Types of Ru(II) Complexes. Organometallics 2019; 38:3338-3348. [PMID: 33299263 DOI: 10.1021/acs.organomet.9b00425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pyridine-phosphaalkene (PN) ligands 2a-e were prepared in an E-selective fashion using phospha-Wittig methodology. Treatment of these five ligands, varying only in their 6-substituent with RuCl2(PPh3)3, produced four distinct types of coordination complexes: pyridine-phosphaalkene-derived 3b,d, cyclized 4e, and six-coordinate 5a and 6c. Prolonged heating of 3b,d in THF resulted in C-H activation of the Mes* group and cyclization to give 4b,d featuring a bidentate pyridine-phospholane ligand bound to the metal center. Complex 5a, also possessing a newly formed phospholane ring, contained a different spatial arrangement of donors to Ru(II) with an agostic Ru-H-C interaction serving as the sixth donor to the transition metal center. Ligands 2b,d,e and Ru(II) complexes 3b, 4b,e and 5a were all characterized by X-ray crystallography. Six-coordinate 6c featured a structure similar to 4b,d,e, but with the CF3 substituent acting as a weakly bound sixth ligand to the Ru(II) center, as observed by 31P{1H} and19F NMR spectroscopy. The calculated structure of 6c established that the closest Ru- - -F contact was at 2.978 Å.
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Affiliation(s)
- Mika L Nakashige
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Jarin I P Loristo
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Lesley S Wong
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Joshua R Gurr
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Timothy J O'Donnell
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Wesley Y Yoshida
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Russell P Hughes
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Matthew F Cain
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
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7
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Tang S, von Wolff N, Diskin-Posner Y, Leitus G, Ben-David Y, Milstein D. Pyridine-Based PCP-Ruthenium Complexes: Unusual Structures and Metal–Ligand Cooperation. J Am Chem Soc 2019; 141:7554-7561. [DOI: 10.1021/jacs.9b02669] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Himmelbauer D, Mastalir M, Stöger B, Veiros LF, Pignitter M, Somoza V, Kirchner K. Iron PCP Pincer Complexes in Three Oxidation States: Reversible Ligand Protonation To Afford an Fe(0) Complex with an Agostic C–H Arene Bond. Inorg Chem 2018; 57:7925-7931. [DOI: 10.1021/acs.inorgchem.8b01018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel Himmelbauer
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Matthias Mastalir
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Berthold Stöger
- X-Ray Center, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Luis F. Veiros
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais No. 1, 1049-001 Lisboa, Portugal
| | - Marc Pignitter
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Veronika Somoza
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
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9
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Himmelbauer D, Stöger B, Veiros LF, Kirchner K. Reversible Ligand Protonation of a Mn(I) PCP Pincer Complex To Afford a Complex with an η2-Caryl–H Agostic Bond. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00193] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Luis F. Veiros
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais No. 1, 1049-001 Lisboa, Portugal
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10
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Tomsu G, Mastalir M, Pittenauer E, Stöger B, Allmaier G, Kirchner K. Ligand-Enforced Switch of the Coordination Mode in Low-Valent Group 6 Carbonyl Complexes Containing Pyrimidine-Based Bisphosphines. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00192] [Citation(s) in RCA: 5] [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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11
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San Nacianceno V, Ibarlucea L, Mendicute-Fierro C, Rodríguez-Diéguez A, Seco JM, Mota AJ, Garralda MA. Secondary Oxide Phosphines to Promote Tandem Acyl-Alkyl Coupling/Hydrogen Transfer to Afford (Hydroxyalkyl)rhodium Complexes. Theoretical and Experimental Studies. Inorg Chem 2018; 57:5307-5319. [PMID: 29659263 DOI: 10.1021/acs.inorgchem.8b00320] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Acyl(σ-norbornenyl)rhodium(III) dimer [Rh(μ-Cl)(C9H6NCO)(C7H9)L]2 (1) (C7H9 = σ-norbornenyl; L = 4-picoline, isoquinoline) reacts with diphenylphosphine oxide (SPO) to undergo a one-pot reaction involving (i) cleavage of the chloride bridges and coordination of the phosphine, (ii) C-C bond coupling between acyl and norbornenyl in a 18e species, and (iii) ligand-assisted outer-sphere O(P)-to-O(C) hydrogen transfer, to afford mononuclear 16e species [RhCl{(C9H6NC(O)C7H9)(Ph2PO)H}(L)] (2) containing a quinolinyl-(norbornenylhydroxyalkyl) fragment hydrogen-bonded to a κ1- P-phosphinite ligand. Pentacoordinated 2, which adopt a distorted trigonal bipyramidal structure, are kinetic reaction products that transform into the thermodynamic favored isomers 3. Structures 3 contain an unusual weak η1-C anagostic interaction involving the rhodium atom and one carbon atom of the olefinic C-H bond of the norbornenyl substituent in the chelating quinolinyl-hydroxyalkyl moiety. Their structure can be described as pseudoctahedral, through a 5 + 1 coordination, with the anagostic interaction in a trans disposition with respect to the phosphorus atom of the phosphinite ligand. Complexes were characterized in solution by NMR spectroscopy and electrospray ionization mass spectrometry. Complex [RhCl{(C9H6NC(O)C7H9)(Ph2PO)H}(4-picoline)] (3a) was also identified by X-ray diffraction. Density functional theory calculations confirm the proposed structures by a plausible set of mechanisms that accounts for the 1 (monomer) → 2 → 3 transformation. Lowest-energy pathways involve reductive elimination of quinolinylnorbornenylketone, still coordinated in the rhodium(I) species thus formed, followed by O-to-O hydrogen transfer from κ1- P-SPO to the sp3 hybridized carbonyl group (formal alkoxide) avoiding the otherwise expected classical release of ketone. Theoretical 13C NMR studies also confirm the experimental spectral data for the considered structures.
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Affiliation(s)
- Virginia San Nacianceno
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Lourdes Ibarlucea
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Claudio Mendicute-Fierro
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | | | - José M Seco
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Antonio J Mota
- Facultad de Ciencias , Universidad de Granada , Avda. Fuentenueva s/n , 18002 Granada , Spain
| | - María A Garralda
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
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12
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Wenz KM, Liu P, Houk KN. Intramolecular C–H Activation Reactions of Ru(NHC) Complexes Combined with H2 Transfer to Alkenes: A Theoretical Elucidation of Mechanisms and Effects of Ligands on Reactivities. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katharina Marie Wenz
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Peng Liu
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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13
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14
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Activation and selective oxy-functionalization of alkanes with metal complexes: Shilov reaction and some new aspects. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.08.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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15
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de Aguiar SRMM, Stöger B, Pittenauer E, Allmaier G, Veiros LF, Kirchner K. Arene C–H Bond Coordination versus C–H Bond Cleavage in Low-Valent Group 6 Carbonyl Pincer Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00563] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Luis F. Veiros
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais No. 1, 1049-001 Lisboa, Portugal
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16
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Murugesan S, Stöger B, Pittenauer E, Allmaier G, Veiros LF, Kirchner K. A Cobalt(I) Pincer Complex with an η(2) -C(aryl)-H Agostic Bond: Facile C-H Bond Cleavage through Deprotonation, Radical Abstraction, and Oxidative Addition. Angew Chem Int Ed Engl 2016; 55:3045-8. [PMID: 26823229 DOI: 10.1002/anie.201510145] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/22/2015] [Indexed: 11/09/2022]
Abstract
The synthesis and reactivity of a Co(I) pincer complex [Co(ϰ(3) P,CH,P-P(CH)P(NMe) -iPr)(CO)2](+) featuring an η(2)-C(aryl)-H agostic bond is described. This complex was obtained by protonation of the Co(I) complex [Co(PCP(NMe) -iPr)(CO)2]. The Co(III) hydride complex [Co(PCP(NMe) -iPr)(CNtBu)2(H)](+) was obtained upon protonation of [Co(PCP(NMe) -iPr)(CNtBu)2]. Three ways to cleave the agostic C-H bond are presented. First, owing to the acidity of the agostic proton, treatment with pyridine results in facile deprotonation (C-H bond cleavage) and reformation of [Co(PCP(NMe) -iPr)(CO)2]. Second, C-H bond cleavage is achieved upon exposure of [Co(ϰ(3)P,CH,P-P(CH)P(NMe) -iPr)(CO)2](+) to oxygen or TEMPO to yield the paramagnetic Co(II) PCP complex [Co(PCP(NMe) -iPr)(CO)2](+). Finally, replacement of one CO ligand in [Co(ϰ(3) P,CH,P-P(CH)P(NMe) -iPr)(CO)2](+) by CNtBu promotes the rapid oxidative addition of the agostic η(2) -C(aryl)-H bond to give two isomeric hydride complexes of the type [Co(PCP(NMe) -iPr)(CNtBu)(CO)(H)](+).
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Affiliation(s)
- Sathiyamoorthy Murugesan
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria
| | - Berthold Stöger
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria
| | - Ernst Pittenauer
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria
| | - Günter Allmaier
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria
| | - Luis F Veiros
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais No. 1, 1049-001, Lisboa, Portugal
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria.
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17
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Murugesan S, Stöger B, Pittenauer E, Allmaier G, Veiros LF, Kirchner K. A Cobalt(I) Pincer Complex with an η2-Caryl−H Agostic Bond: Facile C−H Bond Cleavage through Deprotonation, Radical Abstraction, and Oxidative Addition. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510145] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sathiyamoorthy Murugesan
- Institute of Applied Synthetic Chemistry; Vienna University of Technology; Getreidemarkt 9 1060 Wien Austria
| | - Berthold Stöger
- Institute of Chemical Technologies and Analytics; Vienna University of Technology; Getreidemarkt 9 1060 Wien Austria
| | - Ernst Pittenauer
- Institute of Chemical Technologies and Analytics; Vienna University of Technology; Getreidemarkt 9 1060 Wien Austria
| | - Günter Allmaier
- Institute of Chemical Technologies and Analytics; Vienna University of Technology; Getreidemarkt 9 1060 Wien Austria
| | - Luis F. Veiros
- Centro de Química Estrutural, Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais No. 1 1049-001 Lisboa Portugal
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry; Vienna University of Technology; Getreidemarkt 9 1060 Wien Austria
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18
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Arras J, Speth H, Mayer HA, Wesemann L. Different Coordination Modes of the Ph2PCsp3PPh2 Pincer Ligand in Rhodium Complexes as a Consequence of Csp3–H Metal Interaction. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00437] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Janet Arras
- Institut für Anorganische
Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Hansjörg Speth
- Institut für Anorganische
Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Hermann A. Mayer
- Institut für Anorganische
Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Lars Wesemann
- Institut für Anorganische
Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
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19
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Glöge T, Jess K, Bannenberg T, Jones PG, Langenscheidt-Dabringhausen N, Salzer A, Tamm M. 16-Electron pentadienyl- and cyclopentadienyl-ruthenium half-sandwich complexes with bis(imidazol-2-imine) ligands and their use in catalytic transfer hydrogenation. Dalton Trans 2015; 44:11717-24. [DOI: 10.1039/c5dt01080b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand exchange from “protonated open ruthenocene” afforded 16-electron ruthenium half-sandwich complexes as efficient transfer hydrogenation catalysts.
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Affiliation(s)
- Thomas Glöge
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Kristof Jess
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Peter G. Jones
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | | | - Albrecht Salzer
- Institut für Anorganische Chemie
- Rheinisch-Westfälische Technische Hochschule Aachen
- 52056 Aachen
- Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
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Adams JJ, Gruver BC, Donohoue R, Arulsamy N, Roddick DM. Acceptor pincer Ru(II) chemistry. Dalton Trans 2012; 41:12601-11. [PMID: 22960862 DOI: 10.1039/c2dt31234d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of new acceptor pincer Ru(II) complexes are reported. The carbonyl complex ((CF(3))PCP)Ru(CO)Cl(2)(-)Et(3)NH(+) is obtained from the reaction of (CF(3))PCPH with [(cod)Ru(μ-Cl)(2)](n). Chloride displacement with (CF(3))PCPH, CO, PPh(3), or C(2)H(4) gave complexes of the type ((CF(3))PCP)Ru(CO)(L)Cl, or in the case of (CF(3))PCPH, the bridged dimeric complex [((CF(3))PCP)Ru(CO)Cl](2)(μ-(CF(3))PCPH). Chloride abstraction from ((CF(3))PCP)Ru(CO)(L)Cl, L = CO or PPh(3) by (Et(3)Si)(2)(μ-H)(+)B(C(6)F(5))(4)(-) followed by Et(3)N addition produced ((CF(3))PCP)Ru(CO)(L)(H) products. Reaction of cis-((CF(3))PCP)Ru(CO)(2)Cl with (Et(3)Si)(2)(μ-H)(+)B(C(6)F(5))(4)(-) in the presence of excess CO afforded ((CF(3))PCP)Ru(CO)(3)(+). The reaction of (CF(3))PCPH with (PPh(3))(3)Ru(H)(O(2)CR) (R = Me or Ph) produced the corresponding carboxylate complexes ((CF(3))PCP)Ru(PPh(3))(O(2)CR).
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Affiliation(s)
- Jeramie J Adams
- Department of Chemistry, University of Wyoming, Box 3838, Laramie, Wyoming 82071, USA
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Spicer CW, Lovitt CF, Girolami GS. Nonagostic M···H–C Interactions. Synthesis, Characterization, and DFT Study of the Titanium Amide Ti2Cl6[N(t-Bu)2]2. Organometallics 2012. [DOI: 10.1021/om300483v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Charles W. Spicer
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
| | - Charity Flener Lovitt
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
| | - Gregory S. Girolami
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
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Gruver BC, Adams JJ, Warner SJ, Arulsamy N, Roddick DM. Acceptor Pincer Chemistry of Ruthenium: Catalytic Alkane Dehydrogenation by (CF3PCP)Ru(cod)(H). Organometallics 2011. [DOI: 10.1021/om200354y] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian C. Gruver
- Department of Chemistry, The University of Wyoming, Department 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, United States
| | - Jeramie J. Adams
- Department of Chemistry, The University of Wyoming, Department 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, United States
| | - Seth J. Warner
- Department of Chemistry, The University of Wyoming, Department 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, United States
| | - Navamoney Arulsamy
- Department of Chemistry, The University of Wyoming, Department 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, United States
| | - Dean M. Roddick
- Department of Chemistry, The University of Wyoming, Department 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, United States
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Koridze AA, Polezhaev AV, Safronov SV, Sheloumov AM, Dolgushin FM, Ezernitskaya MG, Lokshin BV, Petrovskii PV, Peregudov AS. Cationic Ruthenium Hydrido−Carbonyls Derived from Metallocene-Based Pincers: Unusual Rearrangements and H2 Evolution with Formation of Cationic Ruthenium Metallocenylidenes. Organometallics 2010. [DOI: 10.1021/om100667p] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Avthandil A. Koridze
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
- Institute of Organometallic Chemistry, I. Javakhishvili Tbilisi State University, 3 Chavchavadze Avenue, 0128 Tbilisi, Georgia
| | - Alexander V. Polezhaev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Sergey V. Safronov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Alexey M. Sheloumov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Fedor M. Dolgushin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Mariam G. Ezernitskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Boris V. Lokshin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Pavel V. Petrovskii
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
| | - Alexander S. Peregudov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russian Federation
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27
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Albrecht M. Cyclometalation using d-block transition metals: fundamental aspects and recent trends. Chem Rev 2010; 110:576-623. [PMID: 20017477 DOI: 10.1021/cr900279a] [Citation(s) in RCA: 636] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Martin Albrecht
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
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28
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Montag M, Efremenko I, Cohen R, Shimon L, Leitus G, Diskin-Posner Y, Ben-David Y, Salem H, Martin J, Milstein D. Effect of CO on the Oxidative Addition of Arene CH Bonds by Cationic Rhodium Complexes. Chemistry 2010; 16:328-53. [DOI: 10.1002/chem.200901526] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Silver(I) complexes with a bulky acridine-based carboxylic ligand: Syntheses, crystal structures, and luminescent properties. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.05.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Häller LJL, Page MJ, Macgregor SA, Mahon MF, Whittlesey MK. Activation of an Alkyl C−H Bond Geminal to an Agostic Interaction: An Unusual Mode of Base-Induced C−H Activation. J Am Chem Soc 2009; 131:4604-5. [DOI: 10.1021/ja900953d] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- L. Jonas L. Häller
- School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, U.K., and Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | - Michael J. Page
- School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, U.K., and Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | - Stuart A. Macgregor
- School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, U.K., and Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | - Mary F. Mahon
- School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, U.K., and Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | - Michael K. Whittlesey
- School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, U.K., and Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
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32
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Adams JJ, Arulsamy N, Roddick DM. Acceptor Pincer Coordination Chemistry of Platinum: Reactivity Properties of (CF3PCP)Pt(L)+ (L = NC5F5, C2H4). Organometallics 2009. [DOI: 10.1021/om8008876] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeramie J. Adams
- Department of Chemistry, Box 3838, University of Wyoming, Laramie, Wyoming 82071
| | - Navamoney Arulsamy
- Department of Chemistry, Box 3838, University of Wyoming, Laramie, Wyoming 82071
| | - Dean M. Roddick
- Department of Chemistry, Box 3838, University of Wyoming, Laramie, Wyoming 82071
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Schaub T, Radius U, Diskin-Posner Y, Leitus G, Shimon LJW, Milstein D. Pyridine-Based Sulfoxide Pincer Complexes of Rhodium and Iridium. Organometallics 2008. [DOI: 10.1021/om701276s] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Schaub
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
| | - Udo Radius
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
| | - Yael Diskin-Posner
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
| | - Gregory Leitus
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
| | - Linda J. W. Shimon
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
| | - David Milstein
- Department of Organic Chemistry and Unit of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel, and Institute for Inorganic Chemistry, University of Karlsruhe, 76131 Karlsruhe, Germany
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Qayyum S, Haberland K, Forsyth CM, Junk PC, Deacon GB, Kempe R. Small Steric Variations in Ligands with Large Synthetic and Structural Consequences. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701098] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Prechtl MHG, Ben-David Y, Giunta D, Busch S, Taniguchi Y, Wisniewski W, Görls H, Mynott RJ, Theyssen N, Milstein D, Leitner W. Synthesis and Characterisation of Nonclassical Ruthenium Hydride Complexes Containing Chelating Bidentate and Tridentate Phosphine Ligands. Chemistry 2007; 13:1539-46. [PMID: 17117397 DOI: 10.1002/chem.200600897] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The synthesis and characterisation of nonclassical ruthenium hydride complexes containing bidentate PP and tridentate PCP and PNP pincer-type ligands are described. The mononuclear and dinuclear ruthenium complexes presented have been synthesised in moderate to high yields by the direct hydrogenation route (one-pot synthesis) or in a two-step procedure. In both cases [Ru(cod)(metallyl)(2)] served as a readily available precursor. The influences of the coordination geometry and the ligand framework on the structure, binding, and chemical properties of the M--H(2) fragments were studied by X-ray crystal structure analysis, spectroscopic methods, and reactivity towards N(2), D(2), and deuterated solvents.
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Affiliation(s)
- Martin H G Prechtl
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany
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Hoffmann M, Marciniec B. Quantum chemical study of the mechanism of ethylene elimination in silylative coupling of olefins. J Mol Model 2007; 13:477-83. [PMID: 17216286 DOI: 10.1007/s00894-006-0166-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2006] [Accepted: 11/20/2006] [Indexed: 10/23/2022]
Abstract
Silylative coupling of olefins differs from olefin metathesis. Although in both these reactions ruthenium catalysts play a crucial role and ethylene product is detected, ruthenium-carbene intermediate is formed only in the course of the metathesis reaction. In this study quantum chemical calculations based on the density functional theory (DFT) have been carried out in order to examine the mechanism of the silylative coupling of olefins leading to ethylene elimination. In the first step of the catalytic cycle, a hydrogen atom from the ruthenium catalytic center is transferred preferentially to the carbon atom bound to Si in a vinylsilane. This H transfer is coupled with the formation of Ru-C bond. Next, the rotation around the newly formed C-C single bond occurs so that silicon atom is placed in the vicinity of the ruthenium center. The following step involves the migration of a silyl moiety, and leads to Ru-Si bond formation, coupled with ethylene elimination. The next reaction, that is the insertion of ethylene (alkene) into Ru-Si bond, has an activation barrier almost as high as the reaction of ethylene elimination. However, the posibility of removing gaseous ethylene from the reactive mixture together with the entropic fators suggests that the insertion of alkene that is larger than C(2)H(4) is the rate limiting step in the silylative coupling of olefins. It also suggests that the substituents attached to the silicon atom or the carbon atoms of an alkene by electronic and steric effects may significantly affect silyl migration and thus the effectiveness of the catalytic reaction.
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Affiliation(s)
- Marcin Hoffmann
- Department of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780, Poznan, Poland.
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37
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Andrews L, Cho HG. Matrix Preparation and Spectroscopic and Theoretical Investigations of Simple Methylidene and Methylidyne Complexes of Group 4−6 Transition Metals. Organometallics 2006. [DOI: 10.1021/om060318l] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
| | - Han-Gook Cho
- Department of Chemistry, University of Incheon, 177 Dohwa-dong, Nam-ku, Incheon 402-749, South Korea
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38
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C−H versus Ir−X (X = H, Cl) Reactivity in a Tropylium PCP Pincer Iridium Complex1. Organometallics 2005. [DOI: 10.1021/om049289+] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Castro M, Cruz J, López-Sandoval H, Barba-Behrens N. On the CH⋯Cu agostic interaction: chiral copper(ii) compounds with ephedrine and pseudoephedrine derivatives. Chem Commun (Camb) 2005:3779-81. [PMID: 16041414 DOI: 10.1039/b505554g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ephedrine derivative, (H2ceph), yields [Cu(Hceph)2], showing a CH...Cu(II) agostic interaction; while in the analogous compound [Cu(Hcpse)2], with pseudoephedrine (H2cpse), that interaction is absent, despite the fact that these two diasteromers differ only in the orientation of the methyl and phenyl groups: erythro in H2ceph and threo in H2cpse. The X-ray crystal structure of [Cu(Hceph)2], indicates a Cu...HC length of 2.454 A and the theoretical study reveals the formation of a Cu...HC bond since the associated electronic density shows both a bond critical point and a bond ring critical point.
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Affiliation(s)
- Miguel Castro
- Departamento de Física y Química Teórica, DEPg. Facultad de Química, Universidad Nacional Autónoma de México, México D.F., C.P. 04510, México.
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Li X, Vogel T, Incarvito CD, Crabtree RH. Electronic and Steric Effects in the Insertion of Alkynes into an Iridium(III) Hydride. Organometallics 2004. [DOI: 10.1021/om049271z] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xingwei Li
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520
| | - Tiffany Vogel
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520
| | | | - Robert H. Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520
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