1
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Wang Q, Wang Y, Zhao Y, Li Y, Jiang W, Bai W. Aza-metallacycles with a heptavalent Re (d 0) center. Dalton Trans 2024; 53:12872-12875. [PMID: 39051780 DOI: 10.1039/d4dt02082k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
The oxidation state of the metal center is important for a conjugated metallacycle. Although high valent d0-metallacycles of main groups and early transition metals have been reported, such examples of late transition metals are limited. The reactions of ReOCl3(PPh3)2 with 2-ethynyl anilines produced alkenyl amino Re(V) complexes, which can be further oxidized to Re(VII) aza-metallacycles. The conjugated rhenacycle is nonaromatic, however, with close to zero NICS values and localized currents observed by AICD and GIMIC studies.
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Affiliation(s)
- Qianhang Wang
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
| | - Yarong Wang
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, P.R. China.
| | - Yue Zhao
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
| | - Yang Li
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, P.R. China.
| | - Wenfeng Jiang
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
| | - Wei Bai
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
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2
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Levina A, Wardhani K, Stephens LJ, Werrett MV, Caporale C, Dallerba E, Blair VL, Massi M, Lay PA, Andrews PC. Neutral rhenium(I) tricarbonyl complexes with sulfur-donor ligands: anti-proliferative activity and cellular localization. Dalton Trans 2024; 53:7866-7879. [PMID: 38632950 DOI: 10.1039/d4dt00149d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Rhenium(I) tricarbonyl complexes are widely studied for their cell imaging properties and anti-cancer and anti-microbial activities, but the complexes with S-donor ligands remain relatively unexplored. A series of six fac-[Re(NN)(CO)3(SR)] complexes, where (NN) is 2,2'-bipyridyl (bipy) or 1,10-phenanthroline (phen), and RSH is a series of thiocarboxylic acid methyl esters, have been synthesized and characterized. Cellular uptake and anti-proliferative activities of these complexes in human breast cancer cell lines (MDA-MB-231 and MCF-7) were generally lower than those of the previously described fac-[Re(NN)(CO)3(OH2)]+ complexes; however, one of the complexes, fac-[Re(CO)3(phen)(SC(Ph)CH2C(O)OMe)] (3b), was active (IC50 ∼ 10 μM at 72 h treatment) in thiol-depleted MDA-MB-231 cells. Moreover, unlike fac-[Re(CO)3(phen)(OH2)]+, this complex did not lose activity in the presence of extracellular glutathione. Taken together these properties show promise for further development of 3b and its analogues as potential anti-cancer drugs for co-treatment with thiol-depleting agents. Conversely, the stable and non-toxic complex, fac-[Re(bipy)(CO)3(SC(Me)C(O)OMe)] (1a), predominantly localized in the lysosomes of MDA-MB-231 cells, as shown by live cell confocal microscopy (λex = 405 nm, λem = 470-570 nm). It is strongly localized in a subset of lysosomes (25 μM Re, 4 h treatment), as shown by co-localization with a Lysotracker dye. Longer treatment times with 1a (25 μM Re for 48 h) resulted in partial migration of the probe into the mitochondria, as shown by co-localization with a Mitotracker dye. These properties make complex 1a an attractive target for further development as an organelle probe for multimodal imaging, including phosphorescence, carbonyl tag for vibrational spectroscopy, and Re tag for X-ray fluorescence microscopy.
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Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.
| | - Kartika Wardhani
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.
| | - Liam J Stephens
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Melissa V Werrett
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Chiara Caporale
- Department of Chemistry, Curtin University, Bentley, WA 6102, Australia
| | - Elena Dallerba
- Department of Chemistry, Curtin University, Bentley, WA 6102, Australia
| | - Victoria L Blair
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | | | - Peter A Lay
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.
| | - Philip C Andrews
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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3
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Yu W, Zhou Y, Zhao Y, Bai W. Syntheses and characterizations of rhenaindole complexes. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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4
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Capper MS, Enriquez Garcia A, Lai B, Wang BO, Gelfand BS, Shemanko CS, Jalilehvand F. The effect of sodium thiosulfate on cytotoxicity of a diimine Re(I) tricarbonyl complex. Dalton Trans 2021; 50:5968-5977. [PMID: 33949526 DOI: 10.1039/d1dt00517k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, diimine Re(i) tricarbonyl complexes have attracted great interest due to their promising cytotoxic effects. Here, we compare the cytotoxicity and cellular uptake of two Re(i) compounds fac-[(Re(CO)3(bpy)(H2O)](CF3SO3) (1) and Na(fac-[(Re(CO)3(bpy)(S2O3)])·H2O (bpy = 2,2'-bipyridine) (2). The Re-thiosulfate complex in 2 was characterized in two solvated crystal structures {Na(fac-[Re(CO)3(bpy)(S2O3)])·1.75H2O·C2H5OH}4 (2 + 0.75H2O + C2H5OH)4 and (fac-[Re(CO)3(bpy)(H2O)]) (fac-[Re(CO)3(bpy)(S2O3)])·4H2O (3). The cytotoxicity of 1 and 2 was tested in the MDA-MB-231 breast cancer cell line and compared with that of cisplatin. The cellular localization of the Re(i) complexes was investigated using synchrotron-based X-ray fluorescence microscopy (XFM). The results show that replacement of the aqua ligand with thiosulfate renders the complex less toxic most likely by distrupting its cellular entry. Therefore, thiosulfate could potentially have a similar chemoprotective effect against diimine fac-Re(CO)3 complexes as it has against cisplatin.
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Affiliation(s)
- Miles S Capper
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | | | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, USA
| | - Baiwen O Wang
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Carrie S Shemanko
- Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Farideh Jalilehvand
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
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5
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Álvarez D, López-Castro E, Guerrero A, Riera L, Pérez J, Díaz J, Menéndez MI, López R. Influence of the Nucleophilic Ligand on the Reactivity of Carbonyl Rhenium(I) Complexes towards Methyl Propiolate: A Computational Chemistry Perspective. Molecules 2020; 25:molecules25184134. [PMID: 32927650 PMCID: PMC7571231 DOI: 10.3390/molecules25184134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/04/2020] [Accepted: 09/07/2020] [Indexed: 11/28/2022] Open
Abstract
A comparative theoretical study on the reactivity of the complexes [ReY(CO)3(bipy)] (Y = NH2, NHMe, NHpTol, OH, OMe, OPh, PH2, PHMe, PMe2, PHPh, PPh2, PMePh, SH, SMe, SPh; bipy = 2,2′-bipyridine) towards methyl propiolate was carried out to analyze the influence of both the heteroatom (N, O, P, S) and the alkyl and/or aryl substituents of the Y ligand on the nature of the product obtained. The methyl substituent tends to accelerate the reactions. However, an aromatic ring bonded to N and O makes the reaction more difficult, whereas its linkage to P and S favour it. On the whole, ligands with O and S heteroatoms seem to disfavour these processes more than ligands with N and P heteroatoms, respectively. Phosphido and thiolato ligands tend to yield a coupling product with the bipy ligand, which is not the general case for hydroxo, alcoxo or amido ligands. When the Y ligand has an O/N and an H atom the most likely product is the one containing a coupling with the carbonyl ligand, which is not always obtained when Y contains P/S. Only for OMe and OPh, the product resulting from formal insertion into the Re-Y bond is the preferred.
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Affiliation(s)
- Daniel Álvarez
- Departamento de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Asturias, Spain; (D.Á.); (E.L.-C.); (A.G.); (M.I.M.)
| | - Elena López-Castro
- Departamento de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Asturias, Spain; (D.Á.); (E.L.-C.); (A.G.); (M.I.M.)
| | - Arturo Guerrero
- Departamento de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Asturias, Spain; (D.Á.); (E.L.-C.); (A.G.); (M.I.M.)
| | - Lucía Riera
- Centro de Investigación en Nanomateriales y Nanotecnología (CINN), CSIC-Universidad de Oviedo-Principado de Asturias, Avenida de la Vega 4-6, 33940 El Entrego, Spain; (L.R.); (J.P.)
| | - Julio Pérez
- Centro de Investigación en Nanomateriales y Nanotecnología (CINN), CSIC-Universidad de Oviedo-Principado de Asturias, Avenida de la Vega 4-6, 33940 El Entrego, Spain; (L.R.); (J.P.)
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Spain
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Universidad de Extremadura, Avenida de la Universidad s/n, 10071 Cáceres, Extremadura, Spain;
| | - M. Isabel Menéndez
- Departamento de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Asturias, Spain; (D.Á.); (E.L.-C.); (A.G.); (M.I.M.)
| | - Ramón López
- Departamento de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Asturias, Spain; (D.Á.); (E.L.-C.); (A.G.); (M.I.M.)
- Correspondence: ; Tel.: +34-985-102-967
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6
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Álvarez D, Díaz J, Menéndez MI, López R. Addition of Re‐Bonded Nucleophilic Ligands to Activated Alkynes: A Theoretical Rationalization. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Daniel Álvarez
- Departamento de Química Física y Analítica Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Asturias Spain
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica Universidad de Extremadura Avenida de la Universidad s/n 110071 Cáceres Extremadura Spain
| | - M. Isabel Menéndez
- Departamento de Química Física y Analítica Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Asturias Spain
| | - Ramón López
- Departamento de Química Física y Analítica Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Asturias Spain
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7
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Cañadas P, Ziegler S, Fombona S, Hevia E, Miguel D, Pérez J, Riera L. Molybdenum and rhenium carbonyl complexes containing thiolato ligands. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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8
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Álvarez D, Mera-Adasme R, Riera L, Cárdenas-Jirón GI, Pérez J, Díaz J, Menéndez MI, López R. Insights on the Reactivity of Terminal Phosphanido Metal Complexes toward Activated Alkynes from Theoretical Computations. Inorg Chem 2017; 56:6652-6661. [PMID: 28520424 DOI: 10.1021/acs.inorgchem.7b00767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we present a theoretical study on the reaction of [Re(PPh2) (CO)3(phen)] (phen = 1,10-phenanthroline) and [Re(PPh2) (CO)3(bipy)] (bipy = 2,2'-bipyridine) toward methyl propiolate. In agreement with experimental results for the phen ligand, the coupling of the substituted acetylenic carbon with the nonsubstituted ortho carbon of the phen ligand is the preferred route from both kinetic and thermodynamic viewpoints with a Gibbs energy barrier of 18.8 kcal/mol and an exoergicity of 11.1 kcal/mol. There are other two routes, the insertion of the acetylenic fragment into the P-Re bond and the coupling between the substituted acetylenic carbon and a carbonyl ligand in cis disposition, which are kinetically less favorable than the preferred route (by 2.8 and 1.9 kcal/mol, respectively). Compared with phen, the bipy ligand shows less electrophilic character and also less π electron delocalization due to the absence of the fused ring between the two pyridine rings. As a consequence, the route involving the coupling with a carbonyl ligand starts to be kinetically competitive, whereas the product of the attack to bipy is still the most stable and would be the one mainly obtained after spending enough time to reach thermal equilibrium.
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Affiliation(s)
| | - Raúl Mera-Adasme
- Laboratorio de Química Teórica, Facultad de Química y Biología, Universidad de Santiago de Chile , Casilla 40, Correo 33, Santiago, Chile
| | - Lucía Riera
- Centro de Investigación en Nanomateriales y Nanotecnología, CSIC-Universidad de Oviedo-Principado de Asturias , Avenida de la Vega 4-6, 33940 El Entrego, Spain
| | - Gloria I Cárdenas-Jirón
- Laboratorio de Química Teórica, Facultad de Química y Biología, Universidad de Santiago de Chile , Casilla 40, Correo 33, Santiago, Chile
| | - Julio Pérez
- Centro de Investigación en Nanomateriales y Nanotecnología, CSIC-Universidad de Oviedo-Principado de Asturias , Avenida de la Vega 4-6, 33940 El Entrego, Spain
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Universidad de Extremadura , Avenida de la Universidad s/n, 10071 Cáceres, Spain
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9
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Serrano ÁL, Casado MA, Ciriano MA, de Bruin B, López JA, Tejel C. Nucleophilicity and P-C Bond Formation Reactions of a Terminal Phosphanido Iridium Complex. Inorg Chem 2016; 55:828-39. [PMID: 26695592 DOI: 10.1021/acs.inorgchem.5b02301] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The diiridium complex [{Ir(ABPN2)(CO)}2(μ-CO)] (1; [ABPN2](-) = [(allyl)B(Pz)2(CH2PPh2)](-)) reacts with diphenylphosphane affording [Ir(ABPN2)(CO)(H) (PPh2)] (2), the product of the oxidative addition of the P-H bond to the metal. DFT studies revealed a large contribution of the terminal phosphanido lone pair to the HOMO of 2, indicating nucleophilic character of this ligand, which is evidenced by reactions of 2 with typical electrophiles such as H(+), Me(+), and O2. Products from the reaction of 2 with methyl chloroacetate were found to be either [Ir(ABPN2)(CO)(H)(PPh2CH2CO2Me)][PF6] ([6]PF6) or [Ir(ABPN2)(CO)(Cl)(H)] (7) and the free phosphane (PPh2CH2CO2Me), both involving P-C bond formation, depending on the reaction conditions. New complexes having iridacyclophosphapentenone and iridacyclophosphapentanone moieties result from reactions of 2 with dimethyl acetylenedicarboxylate and dimethyl maleate, respectively, as a consequence of a further incorporation of the carbonyl ligand. In this line, the terminal alkyne methyl propiolate gave a mixture of a similar iridacyclophosphapentanone complex and [Ir(ABPN2){CH═C(CO2Me)-CO}{PPh2-CH═CH(CO2Me)}] (10), which bears the functionalized phosphane PPh2-CH═CH(CO2Me) and an iridacyclobutenone fragment. Related model reactions aimed to confirm mechanistic proposals are also studied.
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Affiliation(s)
- Ángel L Serrano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Miguel A Casado
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Bas de Bruin
- Homogeneous and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza , Pedro Cerbuna 12, 50009-Zaragoza, Spain
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10
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Arévalo R, Espinal-Viguri M, Huertos M, Pérez J, Riera L. Dearomatization of Transition Metal-Coordinated N-Heterocyclic Ligands and Related Chemistry. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2016. [DOI: 10.1016/bs.adomc.2016.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Huertos MA, Pérez J, Riera L. Double Activation of an N-Alkylimidazole. Chemistry 2012; 18:9530-3. [DOI: 10.1002/chem.201201603] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Indexed: 11/11/2022]
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12
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Swanson RA, Haywood RS, Gibbons JB, Cordova KE, Patrick BO, Moore C, Rheingold AL, Daley CJ. Diamidato-bis(diphenylphosphino) platinum(II) complexes: Synthesis, characterization, and reactivity in the presence of acid. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.12.056] [Citation(s) in RCA: 10] [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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13
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Zhang J, Zhou X. Selective insertions of unsaturated organic molecules into the Ln–N or N–H bonds of biscyclopentadienyl lanthanide complexes. Dalton Trans 2011; 40:9637-48. [DOI: 10.1039/c1dt10563a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Chen Y, Peng Y, Chen P, Zhao J, Liu L, Li Y, Chen S, Qu J. Insertion reactions of CS2, COS, and PhNCS at thiolate-bridged diiron centers. Dalton Trans 2010; 39:3020-5. [DOI: 10.1039/b920144k] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Sun Y, Zhang Z, Wang X, Li X, Weng L, Zhou X. Lanthanide-Induced Diinsertion of Isocyanates into the N−H Bond: Synthesis, Structure, and Reactivity of Organolanthanides Containing Diureido Ligands. Organometallics 2009. [DOI: 10.1021/om900631j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Sun
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xu Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xiaoqing Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Linhong Weng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
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16
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Swanson RA, Patrick BO, Ferguson MJ, Daley CJ. Tetracoordinate diamidato-bis(phosphanyl) metal systems: Synthesis, characterization, and electrochemical analysis of palladium(II) complexes. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.12.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Pi C, Zhang Z, Pang Z, Zhang J, Luo J, Chen Z, Weng L, Zhou X. Multiple N−H Bond Activation: Synthesis and Reactivity of Functionalized Primary Amido Ytterbium Complexes. Organometallics 2007. [DOI: 10.1021/om061094+] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Kirillov AM, Haukka M, Guedes da Silva MFC, Pombeiro AJL. Synthesis, Characterization and Redox Behaviour of Mono‐ and Dicarbonyl Phosphane Rhenium(I) Complexes Bearing N‐, N,N‐ and N,O‐Type Ligands. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexander M. Kirillov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049–001 Lisbon, Portugal, Fax: +351‐21‐846‐4455
| | - Matti Haukka
- Department of Chemistry, University of Joensuu, P.O. Box 111, 80101, Joensuu, Finland
| | - M. Fátima C. Guedes da Silva
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049–001 Lisbon, Portugal, Fax: +351‐21‐846‐4455
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049–001 Lisbon, Portugal, Fax: +351‐21‐846‐4455
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19
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Cuesta L, Huertos MA, Morales D, Pérez J, Riera L, Riera V, Miguel D, Menéndez-Velazquez A, García-Granda S. Synthesis, Structure, and Reactivity of Mononuclear Re(I) Oximato Complexes. Inorg Chem 2007; 46:2836-45. [PMID: 17298056 DOI: 10.1021/ic062168c] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Complexes [Re(ONCMe2)(CO)3(bipy)] (1) and [Re(ONCMe2)(CO)3(phen)] (2), synthesized by reaction of the respective triflato precursors [Re(OTf)(CO)3(N-N)] (N-N = bipy, phen) with KONCMe2, feature O-bonded monodentate oximato ligands. Compound [Re(CO)3(phen)(HONCMe2)]BAr'4 (3), with a monodentate N-bonded oxime ligand, was prepared by reaction of [Re(OTf)(CO)3(phen)], HONCMe2, and NaBAr'4. Deprotonation of 3 afforded 2. The oximato complexes reacted with p-tolylisocyanate, p-tolylisothiocyanate, maleic anhydride, and tetracyanoethylene, affording the products of the insertion of the electrophile into the Re-O bond, compounds 4-7. One representative of each type of compound was fully characterized, including single-crystal X-ray diffraction. The reactions of 1 and 2 with dimethylacetylenedicarboxylate were found to involve first an insertion as the ones mentioned above but followed by incorporation of water, loss of acetone, and formation of the charge-separated neutral amido complexes 9 and 10. The structure of 9 and 10 was determined by X-ray diffraction, and key features of their electronic distribution were studied using a topological analysis of the electron density as obtained from the Fourier map.
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Affiliation(s)
- Luciano Cuesta
- Departamento de Química OrgAnica e InorgAnica -IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33006 Oviedo, Spain
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Organometallic Chemistry of Polypyridine Ligands II. ADVANCES IN HETEROCYCLIC CHEMISTRY 2007. [DOI: 10.1016/s0065-2725(06)94002-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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21
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Gabrielsson A, Busby M, Matousek P, Towrie M, Hevia E, Cuesta L, Perez J, Zális S, Vlcek A. Electronic Structure and Excited States of Rhenium(I) Amido and Phosphido Carbonyl−Bipyridine Complexes Studied by Picosecond Time-Resolved IR Spectroscopy and DFT Calculations. Inorg Chem 2006; 45:9789-97. [PMID: 17112276 DOI: 10.1021/ic0614768] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
UV-vis absorption and picosecond time-resolved IR (TRIR) spectra of amido and phosphido complexes fac-[Re(ER2)(CO)3(bpy)] (ER2 = NHPh, NTol2, PPh2, bpy = 2,2'-bipyridine, Tol = 4-methylphenyl) were investigated in conjunction with DFT and TD-DFT calculations in order to understand their ground-state electronic structure, low-lying electronic transitions and excited-state character and dynamics. The HOMO is localized at the amido/phosphido ligand. Amide and phosphide ligands are sigma-bonded to Re, the pi interaction being negligible. Absorption spectra show a weak band at low energies (1.7-2.1 eV) that arises from essentially pure ER(2) --> bpy ligand-to-ligand charge transfer (LLCT). The lowest excited state is the corresponding triplet, (3)LLCT. Low triplet energies and large distortions diminish the excited-state lifetimes to 85 and 270 ps for NHPh and NTol(2), respectively, and to ca. 30 ps for PPh2. nu(CO) vibrations undergo only very small (<or=10 cm(-1)) shifts upon excitation, attesting to its LLCT character, which hardly affects the electron-density distribution on the Re(CO)3 moiety. Relaxation of the (3)LLCT state occurs with complex dynamics ranging from units to tens of picoseconds. The "pure" LLCT excitation, which does not mix with the Re --> bpy MLCT character, is a unique feature of the amido/phoshido complexes, whose lowest excited state can be viewed as containing a highly unusual aminyl/phosphinyl radical-cationic ligand. For comparison, the amino and phosphino complexes fac-[Re(NHPh(2))(CO)3(bpy)]+ and fac-[Re(PPh3)(CO)3(bpy)]+ are shown to have the usual Re --> bpy (3)MLCT lowest excited states, characterized by upshifted nu(CO) bands.
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Affiliation(s)
- Anders Gabrielsson
- School of Biological and Chemical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS, United Kingdom
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Liu R, Zhang C, Zhu Z, Luo J, Zhou X, Weng L. Reactivity of Lanthanocene Amide Complexes toward Ketenes: Unprecedented Organolanthanide-Induced Conjugate Electrophilic Addition of Ketenes to Arenes. Chemistry 2006; 12:6940-52. [PMID: 16755619 DOI: 10.1002/chem.200600161] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper presents some unusual types of reactions of lanthanocene amide complexes with ketenes, and demonstrates that these reactions are dependent on the nature of amide ligands and ketenes as well as the stoichiometric ratio under the conditions involved. The reaction of [{Cp(2)LnNiPr(2)}(2)] with four equivalents of Ph(2)CCO in toluene affords the unexpected enolization dearomatization products [Cp(2)Ln(OC{2,5-C(6)H(5)(==CPhCONiPr(2)-4)}==CPh(2))] (Ln = Yb (1 a), Er (1 b)) in good yields, representing an unprecedented conjugate electrophilic addition to a non-coordinated benzenoid nucleus. Treatment of [{Cp(2)LnNiPr(2)}(2)] with four equivalents of PhEtCCO under the same conditions gives the unexpected enolization dearomatization/rearomatization products [{Cp(2)Ln(OC{C(6)H(4)(p-CHEtCONiPr(2))}==CEtPh)}(2)] (Ln = Yb (2 a), Er (2 b), Dy (2 c)). However, reaction of [{Cp(2)YbNiPr(2)}(2)] with PhEtCCO in THF forms only the mono-insertion product [Cp(2)Yb{OC(NiPr(2))==CEtPh}](THF) (3). Hydrolysis of 2 afforded aryl ketone PhEtCHCOC(6)H(4)(p-CHEtCONiPr(2)) (4) and the overall formation of aryl ketone 4 provides an alternative route to the acylation of aromatic compounds. Moreover, reaction of [{Cp(2)LnNHPh}(2)] with excess of PhEtCCO or Ph(2)CCO in toluene affords only the products from a formal insertion of the C==C bond of the ketene into the N--H bond, [(Cp(2)Ln{OC(CHEtPh)NPh})(2)] (Ln = Yb (5 a), Y (5 b)) or [(Cp(2)Er{OC(CHPh(2))NPh})(2)] (6), respectively, indicating that an isomerization involving a 1,3-hydrogen shift occurs more easily than the conjugate electrophilic addition reaction, along with the initial amide attack on the ketene carbonyl carbon. [{Cp(2)ErNHEt}(2)] reacts with an excess of PhEtCCO to give [(Cp(2)Er{PhEtCHCON(Et)COCEtPh})(2)] (7), revealing another unique pattern of double-insertion of ketenes into the metal-ligand bond without bond formation between two ketene molecules. All complexes were characterized by elemental analysis and by their spectroscopic properties. The structures of complexes 1 b, 2 a, 2 b, 5 a, 5 b, 6, and 7 were also determined through X-ray single-crystal diffraction analysis.
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Affiliation(s)
- Ruiting Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P.R. China
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Cuesta L, Hevia E, Morales D, Pérez J, Riera L, Miguel D. Reactivity of Molybdenum and Rhenium Hydroxo Complexes toward Organic Electrophiles: Reactions that Afford Carboxylato Products. Organometallics 2006. [DOI: 10.1021/om051081g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luciano Cuesta
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
| | - Eva Hevia
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
| | - Dolores Morales
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
| | - Julio Pérez
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
| | - Lucía Riera
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
| | - Daniel Miguel
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, Oviedo 33006, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid 47071, Spain
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Arroyo M, López-Sanvicente Á, Miguel D, Villafañe F. Pyrazolylamidino- and Bis(pyrazole)manganese(I) Complexes. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500419] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: annual survey covering the year 2003. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.10.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang J, Gunnoe TB, Petersen JL. Reactions of (PCP)Ru(CO)(NHPh)(PMe3) (PCP = 2,6-(CH2PtBu2)2C6H3) with Substrates That Possess Polar Bonds. Inorg Chem 2005; 44:2895-907. [PMID: 15819577 DOI: 10.1021/ic0483592] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Ru(II) amido complex (PCP)Ru(CO)(PMe(3))(NHPh) (1) (PCP = 2,6-(CH(2)P(t)Bu(2))(2)C(6)H(3)) reacts with compounds that possess polar C=N, C triple bond N, or C=O bonds (e.g., nitriles, carbodiimides, or isocyanates) to produce four-membered heterometallacycles that result from nucleophilic addition of the amido nitrogen to an unsaturated carbon of the organic substrate. Based on studies of the reaction of complex 1 with acetonitrile, the transformations are suggested to proceed by dissociation of trimethylphosphine, followed by coordination of the organic substrate and then intramolecular N-C bond formation. In the presence of ROH (R = H or Me), the fluorinated amidinate complex (PCP)Ru(CO)(N(Ph)C(C(6)F(5))NH) (6) reacts with excess pentafluorobenzonitrile to produce (PCP)Ru(CO)(F)(N(H)C(C(6)F(5))NHPh) (7). The reaction with MeOH also produces o-MeOC(6)F(4)CN (>90%) and p-MeOC(6)F(4)CN (<10%). Details of the solid-state structures of (PCP)Ru(CO)(F)(N(H)C(C(6)F(5))NHPh) (7), (PCP)Ru(CO)[PhNC{NH(hx)}N(hx)] (8), (PCP)Ru(CO){N(Ph)C(NHPh)O} (9), and (PCP)Ru(CO){OC(Ph)N(Ph)} (10) are reported.
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Affiliation(s)
- Jubo Zhang
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA
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Cuesta L, Hevia E, Morales D, Pérez J, Riera V, Seitz M, Miguel D. Activation of Ancillary Ligands in the Reactions of DMAD with Phosphido and Alkylideneamido Rhenium Complexes. Organometallics 2005. [DOI: 10.1021/om049019r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luciano Cuesta
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Eva Hevia
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Dolores Morales
- Departamento de Química Orgánica e Inorgánica/IUQOEM, 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, 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, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain, and Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Markus Seitz
- Departamento de Química Orgánica e Inorgánica/IUQOEM, 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, 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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Machura B, Kruszynski R, Jaworska M, Lodowski P. Crystal, molecular and electronic structure of the [ReCl3(bipy)(PPh3)] complex. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Cuesta L, Hevia E, Morales D, Pérez J, Riera V, Rodríguez E, Miguel D. Activation of a 1,10-phenanthroline ligand on a rhenium tricarbonyl complex. Chem Commun (Camb) 2005:116-7. [PMID: 15614391 DOI: 10.1039/b412447b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of complex [Re(PPh(2))(CO)(3)(phen)] with either methyl acrylate or methyl propiolate afford products in which the phen ligand has been activated.
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Affiliation(s)
- Luciano Cuesta
- Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química-CSIC, Universidad de Oviedo, 33006, Oviedo, Spain
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Conner D, Jayaprakash KN, Cundari TR, Gunnoe TB. Synthesis and Reactivity of a Coordinatively Unsaturated Ruthenium(II) Parent Amido Complex: Studies of X−H Activation (X = H or C). Organometallics 2004. [DOI: 10.1021/om049836r] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Conner
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, and Department of Chemistry, University of North Texas, Box 305070, Denton, Texas 76203-5070
| | - K. N. Jayaprakash
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, and Department of Chemistry, University of North Texas, Box 305070, Denton, Texas 76203-5070
| | - Thomas R. Cundari
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, and Department of Chemistry, University of North Texas, Box 305070, Denton, Texas 76203-5070
| | - T. Brent Gunnoe
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, and Department of Chemistry, University of North Texas, Box 305070, Denton, Texas 76203-5070
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Owen GR, Vilar R, White AJP, Williams DJ. Studies on the Reactivity of Isocyanates and Isothiocyanates with Palladium−Imidoyl Complexes. Organometallics 2003. [DOI: 10.1021/om030493r] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gareth R. Owen
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Ramón Vilar
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - David J. Williams
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
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Conner D, Jayaprakash KN, Wells MB, Manzer S, Gunnoe TB, Boyle PD. Octahedral Ru(II) amido complexes TpRu(L)(L')(NHR) (Tp = hydridotris(pyrazolyl)borate; L = L' = P(OMe)3 or PMe3 or L = CO and L' = PPh3; R = H, Ph, or tBu): synthesis, characterization, and reactions with weakly acidic C-H bonds. Inorg Chem 2003; 42:4759-72. [PMID: 12870969 DOI: 10.1021/ic034410a] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The octahedral Ru(II) amine complexes [TpRu(L)(L')(NH(2)R)][OTf] (L = L' = PMe(3), P(OMe)(3) or L = CO and L' = PPh(3); R = H or (t)Bu) have been synthesized and characterized. Deprotonation of the amine complexes [TpRu(L)(L')(NH(3))][OTf] or [TpRu(PMe(3))(2)(NH(2)(t)Bu)][OTf] yields the Ru(II) amido complexes TpRu(L)(L')(NH(2)) and TpRu(PMe(3))(2)(NH(t)Bu). Reactions of the parent amido complexes or TpRu(PMe(3))(2)(NH(t)Bu) with phenylacetylene at room temperature result in immediate deprotonation to form ruthenium-amine/phenylacetylide ion pairs, and heating a benzene solution of the [TpRu(PMe(3))(2)(NH(2)(t)Bu)][PhC(2)] ion pair results in the formation of the Ru(II) phenylacetylide complex TpRu(PMe(3))(2)(C[triple bond]CPh) in >90% yield. The observation that [TpRu(PMe(3))(2)(NH(2)(t)Bu)][PhC(2)] converts to the Ru(II) acetylide with good yield while heating the ion pairs [TpRu(L)(L')(NH(3))][PhC(2)] yields multiple products is attributed to reluctant dissociation of ammonia compared with the (t)butylamine ligand (i.e., different rates for acetylide/amine exchange). These results are consistent with ligand exchange reactions of Ru(II) amine complexes [TpRu(PMe(3))(2)(NH(2)R)][OTf] (R = H or (t)Bu) with acetonitrile. The previously reported phenyl amido complexes TpRuL(2)(NHPh) [L = PMe(3) or P(OMe)(3)] react with 10 equiv of phenylacetylene at elevated temperature to produce Ru(II) acetylide complexes TpRuL(2)(C[triple bond]CPh) in quantitative yields. Kinetic studies indicate that the reaction of TpRu(PMe(3))(2)(NHPh) with phenylacetylene occurs via a pathway that involves TpRu(PMe(3))(2)(OTf) or [TpRu(PMe(3))(2)(NH(2)Ph)][OTf] as catalyst. Reactions of 1,4-cyclohexadiene with the Ru(II) amido complexes TpRu(L)(L')(NH(2)) (L = L' = PMe(3) or L = CO and L' = PPh(3)) or TpRu(PMe(3))(2)(NH(t)Bu) at elevated temperatures result in the formation of benzene and Ru hydride complexes. TpRu(PMe(3))(2)(H), [Tp(PMe(3))(2)Ru[double bond]C[double bond]C(H)Ph][OTf], [Tp(PMe(3))(2)Ru=C(CH(2)Ph)[N(H)Ph]][OTf], and [TpRu(PMe(3))(3)][OTf] have been independently prepared and characterized. Results from solid-state X-ray diffraction studies of the complexes [TpRu(CO)(PPh(3))(NH(3))][OTf], [TpRu(PMe(3))(2)(NH(3))][OTf], and TpRu(CO)(PPh(3))(C[triple bond]CPh) are reported.
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Affiliation(s)
- David Conner
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA
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