1
|
Yoon CW, Yoon YS, Hong SY, Jeon TW, Shin SK. Hazardous characteristics of dust waste from metal manufacturing industries in South Korea. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2021; 39:1471-1479. [PMID: 33719778 DOI: 10.1177/0734242x21996552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The Ministry of Environment, South Korea, is involved in efforts to reduce safety-related accidents that could occur during hazardous waste disposal and minimise the environmental impacts of waste disposal. To reach such goals, new factors have been added that contribute to the hazardous characteristics of hazardous waste. The Ministry is also expanding regulations on inorganic and organic components present in hazardous waste for these factors and continues to correct the classification system to establish standards for waste components. Metallic dust, for example, is mostly generated during the operation of melting furnaces or precipitators and dangerous materials contained in this dust may cause accidents, such as explosions or fires. South Korean accident cases have confirmed that waste containing hazardous materials, such as Mg, Al and Mg-Al alloys, can cause such events. Therefore, this study analysed 28 dust samples collected from the dust accumulated in precipitators in 28 metal manufacturing facilities in South Korea. Nine samples were flammable and four samples were reactive to water. Two samples also exhibited leaching toxicities. The results applied to relevant laws in South Korea showed that the proportion of waste containing hazardous characteristics increased from 7.14% in the previous management category to 39.29% in the extended category, an overall increase of 32.15 percentage points.
Collapse
Affiliation(s)
- Cheol-Woo Yoon
- Resource Recirculation Research Division, National Institute of Environmental Research, South Korea
- Department of Environmental Engineering, In-Ha University, South Korea
| | - Young-Sam Yoon
- Resource Recirculation Research Division, National Institute of Environmental Research, South Korea
| | - Su-Yeon Hong
- Resource Recirculation Research Division, National Institute of Environmental Research, South Korea
| | - Tea-Wan Jeon
- Resource Recirculation Research Division, National Institute of Environmental Research, South Korea
| | - Sun-Kyoung Shin
- Resource Recirculation Research Division, National Institute of Environmental Research, South Korea
| |
Collapse
|
2
|
Álvarez D, Castro‐López E, Fernández‐Pulido Y, Menéndez MI, López R. [Cp
2
Mo(OH)(OH
2
)]
+
‐Catalyzed Hydrolysis of Mono‐ and Difunctional Ethers: Theoretical Understanding of Their Divergent Reactivity. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Álvarez
- Departamento de Química Física y Analítica Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Asturias Spain
| | - Elena Castro‐López
- Departamento de Química Física y Analítica Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Asturias Spain
| | - Yoana Fernández‐Pulido
- Departamento de Ingeniería Eléctrica Universidad de Oviedo Campus de Gijón 33203 Gijón Asturias 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
| |
Collapse
|
3
|
Mandour HSA, Nakagawa Y, Tone M, Inoue H, Otog N, Fujisawa I, Chanthamath S, Iwasa S. Reusable and highly enantioselective water-soluble Ru(II)- Amm-Pheox catalyst for intramolecular cyclopropanation of diazo compounds. Beilstein J Org Chem 2019; 15:357-363. [PMID: 30800184 PMCID: PMC6369996 DOI: 10.3762/bjoc.15.31] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/16/2019] [Indexed: 12/28/2022] Open
Abstract
A reusable and highly enantioselective catalyst for the intramolecular cyclopropanation of various diazo ester and Weinreb amide derivatives was developed. The reactions catalyzed by a water-soluble Ru(II)-Amm-Pheox catalyst proceeded smoothly at room temperature, affording the corresponding bicyclic cyclopropane ring-fused lactones and lactams in high yields (up to 99%) with excellent enantioselectivities (up to 99% ee). After screening of various catalysts, the Ru(II)-Amm-Pheox complex having an ammonium group proved to be crucial for the intramolecular cyclopropanation reaction in a water/ether biphasic medium. The water-soluble catalyst could be reused at least six times with little loss in yield and enantioselectivity.
Collapse
Affiliation(s)
- Hamada S A Mandour
- Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Yoko Nakagawa
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Masaya Tone
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Hayato Inoue
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Nansalmaa Otog
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Ikuhide Fujisawa
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Soda Chanthamath
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| | - Seiji Iwasa
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-Cho, Toyohashi 441-8580, Japan
| |
Collapse
|
4
|
Film-shear reactors and more water-soluble ligands; new tools for doing inorganic and organometallic chemistry in aqueous solution. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
5
|
Boukachabia M, Aribi-Zouioueche L, Riant O. Synthesis and evaluation of hemisalen type ligands based on chiral diamine and their use with ruthenium (II) as water-soluble catalysts for the ATH of aromatic ketones. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
6
|
Messina MS, Stauber JM, Waddington MA, Rheingold AL, Maynard HD, Spokoyny AM. Organometallic Gold(III) Reagents for Cysteine Arylation. J Am Chem Soc 2018; 140:7065-7069. [PMID: 29790740 PMCID: PMC6491213 DOI: 10.1021/jacs.8b04115] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An efficient method for chemoselective cysteine arylation of unprotected peptides and proteins using Au(III) organometallic complexes is reported. The bioconjugation reactions proceed rapidly (<5 min) at ambient temperature in various buffers and within a wide pH range (0.5-14). This approach provides access to a diverse array of S-aryl bioconjugates including fluorescent dye, complex drug molecule, affinity label, poly(ethylene glycol) tags, and a stapled peptide. A library of Au(III) arylation reagents can be prepared as air-stable, crystalline solids in one step from commercial reagents. The selective and efficient arylation procedures presented in this work broaden the synthetic scope of cysteine bioconjugation and serve as promising routes for the modification of complex biomolecules.
Collapse
Affiliation(s)
- Marco S Messina
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095-1569 , United States
| | - Julia M Stauber
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095-1569 , United States
| | - Mary A Waddington
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095-1569 , United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093 , United States
| | - Heather D Maynard
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095-1569 , United States
- California NanoSystems Institute , University of California, Los Angeles , 570 Westwood Plaza , Los Angeles , California 90095-1569 , United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095-1569 , United States
- California NanoSystems Institute , University of California, Los Angeles , 570 Westwood Plaza , Los Angeles , California 90095-1569 , United States
| |
Collapse
|
7
|
Grice KA, Saucedo C, Sovereign MA, Cho AP. The Electrochemical Behavior of Early Metal Metallocene Cp2MCl2 Complexes under CO2. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.09.095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
8
|
|
9
|
Affiliation(s)
- Dong Wang
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| |
Collapse
|
10
|
Suárez D, Díaz N. Molecular Modeling of Bioorganometallic Compounds: Thermodynamic Properties of Molybdocene-Glutathione Complexes and Mechanism of Peptide Hydrolysis. Chemphyschem 2015; 16:1646-56. [DOI: 10.1002/cphc.201500169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 01/05/2023]
|
11
|
Tílvez E, Cárdenas-Jirón GI, Menéndez MI, López R. Understanding the hydrolysis mechanism of ethyl acetate catalyzed by an aqueous molybdocene: a computational chemistry investigation. Inorg Chem 2015; 54:1223-31. [PMID: 25634296 DOI: 10.1021/ic501416u] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A thoroughly mechanistic investigation on the [Cp2Mo(OH)(OH2)](+)-catalyzed hydrolysis of ethyl acetate has been performed using density functional theory methodology together with continuum and discrete-continuum solvation models. The use of explicit water molecules in the PCM-B3LYP/aug-cc-pVTZ (aug-cc-pVTZ-PP for Mo)//PCM-B3LYP/aug-cc-pVDZ (aug-cc-pVDZ-PP for Mo) computations is crucial to show that the intramolecular hydroxo ligand attack is the preferred mechanism in agreement with experimental suggestions. Besides, the most stable intermediate located along this mechanism is analogous to that experimentally reported for the norbornenyl acetate hydrolysis catalyzed by molybdocenes. The three most relevant steps are the formation and cleavage of the tetrahedral intermediate immediately formed after the hydroxo ligand attack and the acetic acid formation, with the second one being the rate-determining step with a Gibbs energy barrier of 36.7 kcal/mol. Among several functionals checked, B3LYP-D3 and M06 give the best agreement with experiment as the rate-determining Gibbs energy barrier obtained only differs 0.2 and 0.7 kcal/mol, respectively, from that derived from the experimental kinetic constant measured at 296.15 K. In both cases, the acetic acid elimination becomes now the rate-determining step of the overall process as it is 0.4 kcal/mol less stable than the tetrahedral intermediate cleavage. Apart from clarifying the identity of the cyclic intermediate and discarding the tetrahedral intermediate formation as the rate-determining step for the mechanism of the acetyl acetate hydrolysis catalyzed by molybdocenes, the small difference in the Gibbs energy barrier found between the acetic acid formation and the tetrahedral intermediate cleavage also uncovers that the rate-determining step could change when studying the reactivity of carboxylic esters other than ethyl acetate substrate specific toward molybdocenes or other transition metal complexes. Therefore, in general, the information reported here could be of interest in designing new catalysts and understanding the reaction mechanism of these and other metal-catalyzed hydrolysis reactions.
Collapse
Affiliation(s)
- Elkin Tílvez
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo , C/Julián Clavería 8, 33006 Oviedo, Principado de Asturias, Spain
| | | | | | | |
Collapse
|
12
|
Demakova MY, Luzyanin KV, Starova GL, Kukushkin VY. Facile alternative route to cis -[PtCl 2 (PTA) 2 ] and [PtCl(PTA) 3 ]Cl (PTA = 1,3,5-triaza-7-phosphaadamantane). INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
13
|
|
14
|
Schejbal J, Honzíček J, Vinklárek J, Erben M, Růžičková Z. Acyl-Functionalized Molybdenum Compounds [(η3-C3H5)(η5-Cp′)Mo(CO)2]: An Experimental Study Including the X-ray Structure of a RareendoConformer. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402700] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
15
|
|
16
|
Suárez D, Díaz N, López R. A combined semiempirical and DFT computational protocol for studying bioorganometallic complexes: Application to molybdocene-cysteine complexes. J Comput Chem 2013; 35:324-34. [DOI: 10.1002/jcc.23503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 11/15/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Dimas Suárez
- Departamento de Química Física y Analítica; Facultad de Química; Universidad de Oviedo; C/ Julián Clavería 8 Oviedo 33006 Spain
| | - Natalia Díaz
- Departamento de Química Física y Analítica; Facultad de Química; Universidad de Oviedo; C/ Julián Clavería 8 Oviedo 33006 Spain
| | - Ramón López
- Departamento de Química Física y Analítica; Facultad de Química; Universidad de Oviedo; C/ Julián Clavería 8 Oviedo 33006 Spain
| |
Collapse
|
17
|
Insights into the hydrolytic chemistry of molybdocene dichloride based on a theoretical mechanistic study. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1409-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
18
|
Tílvez E, Menéndez MI, López R. Unraveling the Reaction Mechanism on Nitrile Hydration Catalyzed by [Pd(OH2)4]2+: Insights from Theory. Inorg Chem 2013; 52:7541-9. [DOI: 10.1021/ic400554g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Elkin Tílvez
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| | - María I. Menéndez
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| | - Ramón López
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| |
Collapse
|
19
|
Honzíček J, Vinklárek J, Erben M, Lodinský J, Dostál L, Padělková Z. Toward the Synthesis of Indenyl Molybdenum Compound [(η3-Ind)(η5-Cp)Mo(CO)2]: Modified Compounds and Structure of a Previously Unrecognized Intermediate. Organometallics 2013. [DOI: 10.1021/om400305z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Honzíček
- Institute of Chemistry and Technology
of Macromolecular Materials, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532
10 Pardubice, Czech Republic
| | - Jaromír Vinklárek
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Milan Erben
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Jakub Lodinský
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Libor Dostál
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Zdeňka Padělková
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| |
Collapse
|
20
|
Kuo LY, Shari’ati YA, Valente EJ. Aqueous Chemistry of the Metallocene [Cp 2MoCl 2]BF 4: Evidence of Autocatalytic Molybdenum(V) Reduction in Water. Organometallics 2013. [DOI: 10.1021/om301262u] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Louis Y. Kuo
- Department of Chemistry, Lewis & Clark College, Portland, Oregon 97219, United States
| | - Yusef A. Shari’ati
- Department of Chemistry, Lewis & Clark College, Portland, Oregon 97219, United States
| | - Edward J. Valente
- Department of Chemistry, University of Portland, Portland, Oregon 97203, United States
| |
Collapse
|
21
|
Bhagan S, Imler GH, Wayland BB. Iridium porphyrins in CD3OD: reduction of Ir(III), CD3-OD bond cleavage, Ir-D acid dissociation and alkene reactions. Inorg Chem 2013; 52:4611-7. [PMID: 23540797 DOI: 10.1021/ic400240b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Methanol solutions of iridium(III) tetra(p-sulfonatophenyl)porphyrin [(TSPP)Ir(III)] form an equilibrium distribution of methanol and methoxide complexes ([(TSPP)Ir(III)(CD3OD)(2-n)(OCD3)n]((3+n)-)). Reaction of [(TSPP)Ir(III) with dihydrogen (D2) in methanol produces an iridium hydride [(TSPP)Ir(III)-D(CD3OD)](4-) in equilibrium with an iridium(I) complex ([(TSPP)Ir(I)(CD3OD)](5-)). The acid dissociation constant of the iridium hydride (Ir-D) in methanol at 298 K is 3.5 × 10(-12). The iridium(I) complex ([(TSPP)Ir(I)(CD3OD)](5-)) catalyzes reaction of [(TSPP)Ir(III)-D(CD3OD)](4-) with CD3-OD to produce an iridium methyl complex [(TSPP)Ir(III)-CD3(CD3OD)](4-) and D2O. Reactions of the iridium hydride with ethene and propene produce iridium alkyl complexes, but the Ir-D complex fails to give observable addition with acetaldehyde and carbon monoxide in methanol. Reaction of the iridium hydride with propene forms both the isopropyl and propyl complexes with free energy changes (ΔG° 298 K) of -1.3 and -0.4 kcal mol(-1) respectively. Equilibrium thermodynamics and reactivity studies are used in discussing relative Ir-D, Ir-OCD3 and Ir-CD2- bond energetics in methanol.
Collapse
Affiliation(s)
- Salome Bhagan
- Temple University, Department of Chemistry, 130 Beury Hall, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | | | | |
Collapse
|
22
|
Lee WC, Sears JM, Enow RA, Eads K, Krogstad DA, Frost BJ. Hemilabile β-Aminophosphine Ligands Derived from 1,3,5-Triaza-7-phosphaadamantane: Application in Aqueous Ruthenium Catalyzed Nitrile Hydration. Inorg Chem 2013; 52:1737-46. [DOI: 10.1021/ic301160x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Wei-Chih Lee
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| | - Jeremiah M. Sears
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| | - Raphel A. Enow
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| | - Kelly Eads
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| | - Donald A. Krogstad
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| | - Brian J. Frost
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United
States
| |
Collapse
|
23
|
Papp G, Horváth H, Laurenczy G, Szatmári I, Kathó Á, Joó F. Classical and non-classical phosphine-Ru(ii)-hydrides in aqueous solutions: many, various, and useful. Dalton Trans 2013; 42:521-9. [DOI: 10.1039/c2dt31793a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Tílvez E, Menéndez MI, López R. A Theoretical Investigation on the Oxidation of Carbon Monoxide by an Aqueous Molybdocene. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Elkin Tílvez
- Departamento de Química Física y Analítica, Universidad de Oviedo, c/ Julián Clavería 8, 33006 Oviedo, Principado de Asturias, Spain, Fax: +34‐985103125, http://www.unioviedo.es/mrq/Ingles/mrq_ramon
| | - María I. Menéndez
- Departamento de Química Física y Analítica, Universidad de Oviedo, c/ Julián Clavería 8, 33006 Oviedo, Principado de Asturias, Spain, Fax: +34‐985103125, http://www.unioviedo.es/mrq/Ingles/mrq_ramon
| | - Ramón López
- Departamento de Química Física y Analítica, Universidad de Oviedo, c/ Julián Clavería 8, 33006 Oviedo, Principado de Asturias, Spain, Fax: +34‐985103125, http://www.unioviedo.es/mrq/Ingles/mrq_ramon
| |
Collapse
|
25
|
Kopilevich S, Gil A, Garcia-Ratés M, Bonet-Ávalos J, Bo C, Müller A, Weinstock IA. Catalysis in a Porous Molecular Capsule: Activation by Regulated Access to Sixty Metal Centers Spanning a Truncated Icosahedron. J Am Chem Soc 2012; 134:13082-8. [DOI: 10.1021/ja304513t] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Sivil Kopilevich
- Department of Chemistry and
the Ilse Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer Sheva, 84105,
Israel
| | - Adrià Gil
- Institute of Chemical Research of Catalonia, ICIQ, Tarragona, 43007, Spain
| | - Miquel Garcia-Ratés
- Department of Chemical
Engineering,
ETSEQ, Universitat Rovira i Virgili, Tarragona,
43007, Spain
| | - Josep Bonet-Ávalos
- Department of Chemical
Engineering,
ETSEQ, Universitat Rovira i Virgili, Tarragona,
43007, Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia, ICIQ, Tarragona, 43007, Spain
| | - Achim Müller
- Faculty of Chemistry, University of Bielefeld, Bielefeld, D-33501, Germany
| | - Ira A. Weinstock
- Department of Chemistry and
the Ilse Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer Sheva, 84105,
Israel
| |
Collapse
|
26
|
Merola JS, Husebo TL, Matthews KE. Aqueous Organometallic Chemistry of mer-Ir(H)2(PMe3)3X Complexes. Organometallics 2012. [DOI: 10.1021/om300140f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph S. Merola
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia
24016, United States
| | - Trang Le Husebo
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia
24016, United States
| | - Kelly E. Matthews
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia
24016, United States
| |
Collapse
|
27
|
Honzíček J, Kratochvíl P, Vinklárek J, Eisner A, Padělková Z. Effect of the Substitution on the Protonation of Allyl Cyclopentadienyl Molybdenum(II) Compounds. Organometallics 2012. [DOI: 10.1021/om2010244] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Honzíček
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Pavel Kratochvíl
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Jaromír Vinklárek
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| | - Aleš Eisner
- Department
of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Zdeňka Padělková
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice,
Czech Republic
| |
Collapse
|
28
|
Tílvez E, Menéndez MI, López R. On the Mechanism of the [Cp2Mo(OH)(OH2)]+-Catalyzed Nitrile Hydration to Amides: A Theoretical Study. Organometallics 2012. [DOI: 10.1021/om200541z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Elkin Tílvez
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| | - María I. Menéndez
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| | - Ramón López
- Departamento de Química
Física y Analítica,
Facultad de Química, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Principado de
Asturias, Spain
| |
Collapse
|
29
|
Conde A, Fandos R, Hernández C, Otero A, Rodríguez A, Ruiz MJ. Ligand-Modification Effects on the Reactivity, Solubility, and Stability of Organometallic Tantalum Complexes in Water. Chemistry 2012; 18:2319-26. [DOI: 10.1002/chem.201103026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Indexed: 11/05/2022]
|
30
|
Chernyshev AN, Bokach NA, Gushchin PV, Haukka M, Kukushkin VY. Reactions of platinum(iv)-bound nitriles with isomeric nitroanilines: addition vs. substitution. Dalton Trans 2012; 41:12857-64. [DOI: 10.1039/c2dt30986f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Sarkar S, Li S, Wayland BB. Hydrogen and methanol exchange processes for (TMP)Rh-OCH3(CH3OH) in binary solutions of methanol and benzene. Inorg Chem 2011; 50:3313-9. [PMID: 21428303 DOI: 10.1021/ic1020466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tetramesityl porphinato rhodium(III) methoxide ((TMP)Rh-OCH(3)) binds with methanol in benzene to form a 1:1 methanol complex ((TMP)Rh-OCH(3)(CH(3)OH)) (1). Dynamic processes are observed to occur for the rhodium(III) methoxide methanol complex (1) that involve both hydrogen and methanol exchange. Hydrogen exchange between coordinated methanol and methoxide through methanol in solution results in an interchange of the environments for the non-equivalent porphyrin faces that contain methoxide and methanol ligands. Interchange of the environments of the coordinated methanol and methoxide sites in 1 produces interchange of the inequivalent mesityl o-CH(3) groups, but methanol ligand exchange occurs on one face of the porphyrin and the mesityl o-CH(3) groups remain inequivalent. Rate constants for dynamic processes are evaluated by full line shape analysis for the (1)H NMR of the mesityl o-CH(3) and high field methyl resonances of coordinated methanol and methoxide groups in 1. The rate constant for interchange of the inequivalent porphyrin faces is associated with hydrogen exchange between 1 and methanol in solution and is observed to increase regularly with the increase in the mole fraction of methanol. The rate constant for methanol ligand exchange between 1 and the solution varies with the solution composition and fluctuates in a manner that parallels the change in the activation energy for methanol diffusion which is a consequence of solution non-ideality from hydrogen bonded clusters.
Collapse
Affiliation(s)
- Sounak Sarkar
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | | | | |
Collapse
|
32
|
2-Diphenylphosphanyl-4-pyridyl(dimethyl)amine as an effective ligand for the ruthenium(II) complex catalyzed homogeneous hydration of nitriles under neutral conditions. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.11.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
33
|
Honzíček J, Romão CC, Calhorda MJ, Mukhopadhyay A, Vinklárek J, Padělková Z. Reaction of Spiro[2.4]hepta-4,6-diene with Molybdenum(II) Indenyl Compounds: Effects of Substitution in the Indenyl Ligand. Organometallics 2011. [DOI: 10.1021/om100840r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Honzíček
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Av. da República, EAN, 2780-157, Oeiras, Portugal
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Carlos C. Romão
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Av. da República, EAN, 2780-157, Oeiras, Portugal
| | - Maria J. Calhorda
- Departamento de Química e Bioquímica, CQB, Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Abhik Mukhopadhyay
- REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| | - Jaromír Vinklárek
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Zdeňka Padělková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| |
Collapse
|
34
|
Creutz C, Chou MH, Hou H, Muckerman JT. Hydride Ion Transfer from Ruthenium(II) Complexes in Water: Kinetics and Mechanism. Inorg Chem 2010; 49:9809-22. [DOI: 10.1021/ic101124q] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carol Creutz
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Mei H. Chou
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Hua Hou
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - James T. Muckerman
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| |
Collapse
|
35
|
Li X, Hong J, Liu R, Weng L, Zhou X. Reactions of Cp3Y with Benzophenone: A Simple and Efficient Method for Transformation of Unsubstituted Cyclopentadienyl to Bridged ansa-Cyclopentadienyl/Alkoxyl Ligand. Organometallics 2010. [DOI: 10.1021/om100755s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoqing Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Jianquan Hong
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Ruiting Liu
- 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
| |
Collapse
|
36
|
Oshiki T, Hyodo I, Ishizuka A. Highly Reactive Bifunctional Chemical Catalysts for the Hydration of Nitriles. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.41] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
37
|
Honzíček J, Mukhopadhyay A, Santos-Silva T, Romão MJ, Romão CC. Ring-Functionalized Molybdenocene Complexes. Organometallics 2009. [DOI: 10.1021/om9001022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Honzíček
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal, Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám.Čs. legií 565, 532 10 Pardubice, Czech Republic, and REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| | - Abhik Mukhopadhyay
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal, Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám.Čs. legií 565, 532 10 Pardubice, Czech Republic, and REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| | - Teresa Santos-Silva
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal, Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám.Čs. legií 565, 532 10 Pardubice, Czech Republic, and REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| | - Maria J. Romão
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal, Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám.Čs. legií 565, 532 10 Pardubice, Czech Republic, and REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| | - Carlos C. Romão
- Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal, Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám.Čs. legií 565, 532 10 Pardubice, Czech Republic, and REQUIMTE/CQFB, Departamento de Química, FCT-UNL, 2829-516 Monte de Caparica, Portugal
| |
Collapse
|
38
|
Ahmed TJ, Baxley GT, Tyler DR. Aqueous Speciation of ansa- and non-ansa- Substituted [Cp2Mo(μ-OH)]2[OTs]2. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.09.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
39
|
Silicon-Carbon bond cleavage reactions of Ansa tungstenocene compounds: the [Me2Si] bridge as a site for metallocene functionalization. Proc Natl Acad Sci U S A 2008; 105:11060-5. [PMID: 18635687 DOI: 10.1073/pnas.0803089105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
[Me(2)Si(Cp(Me(2)))(2)]W(H)Cl is obtained via reaction of WCl(6) with a mixture of [Me(2)Si(Cp(Me(2)))(2)]Li(2) and NaBH(4), from which the dichloride [Me(2)Si(Cp(Me(2)))(2)]WCl(2) is obtained via treatment with CHCl(3). [Me(2)Si(Cp(Me(2)))(2)]WCl(2) provides a means to access other ansa tungstenocene compounds, such as [Me(2)Si(Cp(Me(2)))(2)]WH(2), [Me(2)Si(Cp(Me(2)))(2)]WMe(2), and [Me(2)Si(Cp(Me(2)))(2)]WCO. Of most interest, the reactions of [Me(2)Si(Cp(Me(2)))(2)]W(H)Cl with organolithium reagents do not yield simple ansa tungstenocene derivatives. Specifically, the reactions of [Me(2)Si(Cp(Me(2)))(2)]W(H)Cl with MeLi, Bu(n)Li, or PhLi result in the formation of mixed-ring tungstenocene compounds resulting from C-Si cleavage and functionalization of the ansa bridge, namely (Cp(Me(2)))(eta(5),kappa(1)-C(5)H(2)Me(2)SiMe(2)CH(2))WH, (Cp(Me(2)))[eta(5),kappa(1)-C(5)H(2)Me(2)Si(Me)(Bu(n))CH(2)]WH, and (Cp(Me(2)))[eta(5),kappa(1)-C(5)H(2)Me(2)SiMe(2)(C(6)H(4))]WH, respectively. In contrast to the C-Si cleavage achieved by MeLi, Bu(n)Li, and PhLi, the ansa bridge of [Me(2)Si(Cp(Me(2)))(2)]W(H)Cl is inert to Bu(t)Li and the product obtained is the fulvene ("tuck-in") complex [Me(2)Si(Cp(Me(2)))(eta(6)-C(5)MeH(2)CH(2))]WH derived from dehydrohalogenation.
Collapse
|
40
|
Ahmed TJ, Tyler DR. Effect of Solvent on the Dimerization of the ansa-Molybdocene Catalyst [C2Me4Cp2Mo(OH)(OH2)][OTs]. Organometallics 2008. [DOI: 10.1021/om8000907] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takiya J. Ahmed
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403
| | - David R. Tyler
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403
| |
Collapse
|
41
|
Buck DP, Abeysinghe PM, Cullinane C, Day AI, Collins JG, Harding MM. Inclusion complexes of the antitumour metallocenes Cp2MCl2 (M = Mo, Ti) with cucurbit[n]urils. Dalton Trans 2008:2328-34. [PMID: 18414758 DOI: 10.1039/b718322d] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Damian P Buck
- School of Physical, Environmental and Mathematical Sciences, University College, Australian Defence Force Academy, Canberra, ACT 2600, Australia
| | | | | | | | | | | |
Collapse
|
42
|
Natale D, Mareque-Rivas JC. The combination of transition metal ions and hydrogen-bonding interactions. Chem Commun (Camb) 2007:425-37. [PMID: 18188459 DOI: 10.1039/b709650j] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This feature article presents an overview of the types of hydrogen bonding interactions involving metal complexes and their functional effects. It shows with recent examples why hydrogen bonds have become a crucial functional and structural element in modern inorganic chemistry. The relevance of this combination in tackling current chemistry challenges such as energy production and the development of new materials and more effective catalysts, sensors and medicines is illustrated.
Collapse
Affiliation(s)
- Daniela Natale
- School of Chemistry, The University of Edinburgh, Edinburgh, UK
| | | |
Collapse
|
43
|
Ahmed TJ, Zakharov LN, Tyler DR. Organometallic Catalysis in Aqueous Solution. The Hydrolytic Activity of a Water-Soluble ansa-Molybdocene Catalyst. Organometallics 2007. [DOI: 10.1021/om7004657] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takiya J. Ahmed
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403
| | - Lev N. Zakharov
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403
| | - David R. Tyler
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403
| |
Collapse
|
44
|
Conde A, Fandos R, Otero A, Rodríguez A. Water-Soluble Organometallic Complexes of Tantalum: Can Alkyl and Aqua Ligands Coexist in Its Coordination Sphere? Organometallics 2007. [DOI: 10.1021/om0701165] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana Conde
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avd. Carlos III, s/n, 45071 Toledo, Spain, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 10, 13071 Ciudad Real, Spain, and ETS Ingenieros Industriales, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 3, 13071 Ciudad Real, Spain
| | - Rosa Fandos
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avd. Carlos III, s/n, 45071 Toledo, Spain, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 10, 13071 Ciudad Real, Spain, and ETS Ingenieros Industriales, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 3, 13071 Ciudad Real, Spain
| | - Antonio Otero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avd. Carlos III, s/n, 45071 Toledo, Spain, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 10, 13071 Ciudad Real, Spain, and ETS Ingenieros Industriales, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 3, 13071 Ciudad Real, Spain
| | - Ana Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avd. Carlos III, s/n, 45071 Toledo, Spain, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 10, 13071 Ciudad Real, Spain, and ETS Ingenieros Industriales, Universidad de Castilla-La Mancha, Campus de Ciudad Real, Avd. Camilo José Cela, 3, 13071 Ciudad Real, Spain
| |
Collapse
|
45
|
Wu X, Xiao J. Aqueous-phase asymmetric transfer hydrogenation of ketones ? a greener approach to chiral alcohols. Chem Commun (Camb) 2007:2449-66. [PMID: 17563797 DOI: 10.1039/b618340a] [Citation(s) in RCA: 316] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Asymmetric transfer hydrogenation (ATH) has emerged as a practical, powerful alternative to asymmetric hydrogenation for the production of chiral alcohols, one of the most valuable intermediates in chemical synthesis. In the last a few years, ATH in neat water has proved to be viable, affording chiral alcohols in fast rates, high productivity and high enantioselectivity. The reduction can be carried out with unmodified or tailor-made catalysts by using mild, readily available formate salt as reductant with no organic solvents required, thus providing a simple, economic and green pathway for alcohol production. This Feature Article attempts to present an account of the progress made on aqueous-phase transfer hydrogenation (TH) reactions, with a focus on ATH. The coverage includes a brief background of the chemistry, TH and ATH reactions in water, and the mechanistic aspects of the aqueous-phase reduction.
Collapse
Affiliation(s)
- Xiaofeng Wu
- Liverpool Centre for Materials and Catalysis, Department of Chemistry, University of Liverpool, Liverpool, UK
| | | |
Collapse
|
46
|
Abeysinghe PM, Harding MM. Antitumour bis(cyclopentadienyl) metal complexes: titanocene and molybdocene dichloride and derivatives. Dalton Trans 2007:3474-82. [PMID: 17680034 DOI: 10.1039/b707440a] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This Perspective will focus on recent developments in the field of antitumour metallocenes structurally related to titanocene dichloride. Despite extensive testing of titanocene dichloride which culminated in phase I and II clinical trials, further trials have been abandoned. While DNA has been implicated as the major target related to anticancer activity, identification of the active species and mechanism of action has been poorly understood and hence the design of second generation titanocene derivatives has not been possible. Recent mechanistic studies have provided a plausible mechanism for delivery of Ti to cancer cells via transferrin mediated endocytosis. This mechanism requires the presence of labile Cp-Ti bonds that hydrolyse on a time scale to deliver Ti to transferrin. A large range of titanocene derivatives in which the cyclopentadienyl rings have been substituted by both electron withdrawing and donating groups, including aromatic, alkyl and cyclic amines, have been prepared and tested for activity in the last 5 years. These results have shown that subtle structural effects can have a significant effect on biological activity and that biological activity is highly cell line dependent. However, the biological chemistry and cellular studies required to determine the mechanism of action of these new titanocenes have not been reported. In contrast, the bioorganometallic chemistry and cellular studies of molybdocene dichloride have implicated interaction with cellular thiols as the key reaction related to biological activity. Tailoring of the pseudohalide ligands by tuning the strength of the Mo-S bonds provides the opportunity to enhance cell uptake. Further research is required to establish the origin of antitumour activity.
Collapse
|
47
|
Fu X, Li S, Wayland BB. Reactivity and Equilibrium Thermodynamic Studies of Rhodium Tetrakis(3,5-disulfonatomesityl)porphyrin Species with H2, CO, and Olefins in Water. Inorg Chem 2006; 45:9884-9. [PMID: 17112286 DOI: 10.1021/ic0615022] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aqueous (D2O) solutions of tetrakis(3,5-disulfonatomesityl)porphyrin rhodium(III) aquo/hydroxo complexes ([(TMPS)Rh(III)(D2O)2]-7 (1), [(TMPS)Rh(III)(OD)(D2O)]-8 (2), and [(TMPS)Rh(III)(OD)2]-9 (3)) react with hydrogen (D2) to form an equilibrium distribution with a rhodium hydride ([(TMPS)Rh-D(D2O)]-8 (4)) and a rhodium(I) complex ([(TMPS)Rh(I)(D2O)]-9 (5)). Equilibrium constants (298 K) are measured that define the distribution for all five of these (TMPS)Rh species in this system as a function of the dihydrogen (D2) and hydrogen ion (D+) concentrations. The hydride complex [(TMPS)Rh-D(D2O)]-8 is a weak acid in D2O (Ka(298 K) = 4.3 x 10(-8)). Steric demands of the TMPS porphyrin ligand prohibit formation of a Rh(II)-Rh(II)-bonded complex, related rhodium(I)-rhodium(III) adducts, and intermolecular association of alkyl complexes which are prominent features of the rhodium tetra(p-sulfonatophenyl)porphyrin ((TSPP)Rh) system. The rhodium(II) complex ([(TMPS)Rh(II)(D2O)]-8) reacts with water to form hydride and hydroxide complexes and is not observed in D2O. The (TMPS)Rh-OD and (TMPS)Rh-D bond dissociation free energies (BDFE) are virtually equal and have a value of approximately 60 kcal mol(-1). Reactions of [(TMPS)Rh-D(D2O)]-8 in water with CO and olefins produce rhodium formyl and alkyl complexes which have equilibrium thermodynamic values comparable to the values for the corresponding substrate reactions of [(TSPP)Rh-D(D2O)]-4.
Collapse
Affiliation(s)
- Xuefeng Fu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | | | | |
Collapse
|