1
|
Tole TT, Jordaan JHL, Vosloo HCM. Synthesis and application of 1-cycloalkyl-1-(2’-pyridinyl)-methanolato ligand containing ruthenium catalysts for high temperature 1-octene metathesis. REACTION KINETICS MECHANISMS AND CATALYSIS 2023. [DOI: 10.1007/s11144-023-02351-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
2
|
Singh NK, Soobramoney L, Shozi ML, Friedrich HB, Zamisa SJ. Crystal structure of bis{(2-pyridinyl)-1-phenyl-1-isopropylmethanolato-κ 2
N,O}nickel, C 30H 32N 2NiO 2. Z KRIST-NEW CRYST ST 2021. [DOI: 10.1515/ncrs-2021-0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C30H32N2NiO2, monoclinic,
P
2
1
/
c
$P{2}_{1}/c$
(no. 14), a = 12.1250(4) Å, b = 13.6413(4) Å, c = 8.1152(3) Å, β = 108.348(2)°, V = 1274.02(7) Å3, Z = 2, R
gt
(F) = 0.0285, wR
ref
(F
2) = 0.0711, T = 100 K.
Collapse
Affiliation(s)
- Nijal K. Singh
- School of Chemistry and Physics, University of KwaZulu-Natal , Private Bag X54001, Westville Campus, Westville , 4000 Durban , South Africa
| | - Lynette Soobramoney
- School of Chemistry and Physics, University of KwaZulu-Natal , Private Bag X54001, Westville Campus, Westville , 4000 Durban , South Africa
| | - Mzamo L. Shozi
- School of Chemistry and Physics, University of KwaZulu-Natal , Private Bag X54001, Westville Campus, Westville , 4000 Durban , South Africa
| | - Holger B. Friedrich
- School of Chemistry and Physics, University of KwaZulu-Natal , Private Bag X54001, Westville Campus, Westville , 4000 Durban , South Africa
| | - Sizwe J. Zamisa
- School of Chemistry and Physics, University of KwaZulu-Natal , Private Bag X54001, Westville Campus, Westville , 4000 Durban , South Africa
| |
Collapse
|
3
|
Specialized Olefin Metathesis Catalysts Featuring Unsymmetrical N-Heterocyclic Carbene Ligands Bearing N-(Fluoren-9-yl) Arm. Catalysts 2020. [DOI: 10.3390/catal10060599] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Beneficial structural motifs from two known state-of-the-art olefin metathesis catalysts types, bearing unsymmetrical N-heterocyclic carbenes (uNHCs), were combined into a new hybridized design thereby translating the complementary beneficial reactivity demonstrated by their ‘parent’ complexes to the new N-fluorene derived olefin metathesis catalysts. Two chelating 2-iso-propoxy-benzylidene (Hoveyda-type) and two 3-phenyl-1H-inden-1-ylidene (indenylidene-type) complexes were successfully prepared by in situ generation of either the N′-mesityl (Mes) or N′-diisopropylphenyl (Dipp) derived uNHCs taking advantage of the thermal decomposition of the corresponding 2-(penta-fluorophenyl)-imidazolidines (NHC adducts). The new fluorene-derived catalysts mediate challenging olefin metathesis processes, such as α-olefin self-metathesis, with high selectivity and conversion.
Collapse
|
4
|
Tole TT, Jordaan JHL, Vosloo HCM. Catalysis of linear alkene metathesis by Grubbs-type ruthenium alkylidene complexes containing hemilabile α,α-diphenyl-(monosubstituted-pyridin-2-yl)methanolato ligands. Beilstein J Org Chem 2019; 15:194-209. [PMID: 30745994 PMCID: PMC6350883 DOI: 10.3762/bjoc.15.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 12/21/2018] [Indexed: 12/03/2022] Open
Abstract
Four new Grubbs-type precatalysts [RuCl(H2IMes)(O^N)(=CHPh)], where [O^N = α,α-diphenyl-(3-methylpyridin-2-yl)methanolato, α,α-diphenyl-(4-methylpyridin-2-yl)methanolato, α,α-diphenyl-(5-methylpyridin-2-yl)methanolato and α,α-diphenyl-(3-methoxypyridin-2-yl)methanolato] were synthesized and tested for their activity, stability and selectivity in the 1-octene metathesis reaction. Overall the precatalysts showed good activity and high stability for the metathesis of 1-octene at temperatures above 80 °C and up to 110 °C. Selectivities towards the primary metathesis products, i.e., 7-tetradecene and ethene, above 85% were obtained with all the precatalysts at 80 and 90 °C. High selectivities were also observed at 100 °C for the 4-Me- and 3-OMe-substituted precatalysts. With an increase in temperature an increase in isomerisation products and secondary metathesis products were observed with the latter reaching values >20% for the 3-OMe- and 3-Me-substituted precatalysts at 110 and 100 °C, respectively. All the precatalysts exhibits first-order kinetics at 80 °C with the 3-substituted precatalysts the slowest. The behaviour of the 3-substituted precatalysts can be attributed to electronic and steric effects associated with the adjacent bulky phenyl groups.
Collapse
Affiliation(s)
- Tegene T Tole
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa.,Department of Chemistry, College of Natural and Computational Sciences, Hawassa University, Hawassa, Ethiopia
| | - Johan H L Jordaan
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa
| | - Hermanus C M Vosloo
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa
| |
Collapse
|
5
|
Breckwoldt NCC, Goosen NJ, Vosloo HCM, Van der Gryp P. Kinetic evaluation of the hydroformylation of the post-metathesis product 7-tetradecene using a bulky phosphite-modified rhodium catalyst. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00239h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mechanism-based rate model was applied for the hydroformylation of the post-metathesis product 7-tetradecene using a bulky phosphite-modified rhodium catalyst.
Collapse
Affiliation(s)
| | - Neill J. Goosen
- Department of Process Engineering
- University of Stellenbosch
- Matieland 7602
- South Africa
| | - Hermanus C. M. Vosloo
- Research Focus Area for Chemical Resource Beneficiation
- Catalysis and Synthesis Research Group
- North-West University
- Potchefstroom
- South Africa
| | - Percy Van der Gryp
- School of Chemical and Minerals Engineering
- Research Focus Area for Chemical Resource Beneficiation
- North-West University
- Potchefstroom 2522
- South Africa
| |
Collapse
|
6
|
Gawin A, Pump E, Slugovc C, Kajetanowicz A, Grela K. Ruthenium Amide Complexes – Synthesis and Catalytic Activity in Olefin Metathesis and in Ring‐Opening Polymerisation. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anna Gawin
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
| | - Eva Pump
- Institute of Chemistry and Technology Graz University of Technolgy Stremayrgasse 9 801‐0 Graz Austria
| | - Christian Slugovc
- Institute of Chemistry and Technology Graz University of Technolgy Stremayrgasse 9 801‐0 Graz Austria
| | - Anna Kajetanowicz
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
| | - Karol Grela
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
| |
Collapse
|
7
|
Tole T, Jordaan J, Vosloo H. Synthesis and Application of the Transition Metal Complexes of α-Pyridinyl Alcohols, α-Bipyridinyl Alcohols, α,α'-Pyridinyl Diols and α,α'-Bipyridinyl Diols in Homogeneous Catalysis. Molecules 2018; 23:molecules23040896. [PMID: 29649178 PMCID: PMC6017785 DOI: 10.3390/molecules23040896] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/06/2018] [Accepted: 04/06/2018] [Indexed: 11/16/2022] Open
Abstract
The paper presents a comprehensive survey on the synthetic procedures of transition metal complexes of α-pyridinyl alcoholato, α-bipyridinyl alcoholato, α,α'-pyridinyl dialcoholato and α,α'-bipyridinyl dialcoholato ligands and their coordination chemistry. Greater emphasis is, however, given to the catalytic activity of the complexes in homogeneous and asymmetric chemical reactions. The multidentate character of the pyridinyl alcohols and/or bipyridinyl diols is of great importance in the complexation with a large number and type of transition metals. The transition metal complexes of pyridinyl alcoholato or bipyridinyl dialcoholato ligands in most cases, and a few pyridinyl alcohols alone, were used as catalysts in homogeneous and chemical asymmetric reactions. In most of the homogeneously catalysed enantioselective chemical reactions, limited numbers and types of pyridinyl alcohols and or bipyridinyl diols were used in the preparation of chiral catalysts that led to a few investigations on the catalytic importance of the pyridinyl alcohols.
Collapse
Affiliation(s)
- Tegene Tole
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa.
- Department of Chemistry, College of Natural and Computational Sciences, Hawassa University, Hawassa, Ethiopia.
| | - Johannes Jordaan
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa.
| | - Hermanus Vosloo
- Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa.
| |
Collapse
|
8
|
Special Issue on Ruthenium Complexes. Molecules 2017; 22:molecules22020255. [PMID: 28208737 PMCID: PMC6155890 DOI: 10.3390/molecules22020255] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 01/25/2017] [Accepted: 02/04/2017] [Indexed: 11/17/2022] Open
Abstract
The organic chemistry of ruthenium has been one of the most vigorously growing research areas over the past decades. Considerable effort has been extended towards the design and application of a broad series of ruthenium complexes, which culminated with the development by Ryoji Noyori (2001 Nobel Prize for Chemistry) of chiral ruthenium catalysts for stereoselective hydrogenation reactions [1], and the discovery by Robert H. Grubbs (2005 Nobel Prize for Chemistry) of well-defined ruthenium- benzylidene catalysts for olefin metathesis [2] [...].
Collapse
|
9
|
Synthesis and Application of Novel Ruthenium Catalysts for High Temperature Alkene Metathesis. Catalysts 2017. [DOI: 10.3390/catal7010022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
|
10
|
du Toit JI, van der Gryp P, Loock MM, Tole TT, Marx S, Jordaan JH, Vosloo HC. Industrial viability of homogeneous olefin metathesis: Beneficiation of linear alpha olefins with the diphenyl-substituted pyridinyl alcoholato ruthenium carbene precatalyst. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
12
|
Wappel J, Fischer RC, Cavallo L, Slugovc C, Poater A. Simple activation by acid of latent Ru-NHC-based metathesis initiators bearing 8-quinolinolate co-ligands. Beilstein J Org Chem 2016; 12:154-65. [PMID: 26877818 PMCID: PMC4734425 DOI: 10.3762/bjoc.12.17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 01/14/2016] [Indexed: 11/23/2022] Open
Abstract
A straightforward synthesis utilizing the ring-opening metathesis polymerization (ROMP) reaction is described for acid-triggered N,O-chelating ruthenium-based pre-catalysts bearing one or two 8-quinolinolate ligands. The innovative pre-catalysts were tested regarding their behavior in ROMP and especially for their use in the synthesis of poly(dicyclopentadiene) (pDCPD). Bearing either the common phosphine leaving ligand in the first and second Grubbs olefin metathesis catalysts, or the Ru-O bond cleavage for the next Hoveyda-type catalysts, this work is a step forward towards the control of polymer functionalization and living or switchable polymerizations.
Collapse
Affiliation(s)
- Julia Wappel
- Institute for Chemistry and Technology of Materials, Graz University of Technology, NAWI Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Roland C Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Luigi Cavallo
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Christian Slugovc
- Institute for Chemistry and Technology of Materials, Graz University of Technology, NAWI Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Albert Poater
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia; Institut de Química Computacional i Catàlisi, Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| |
Collapse
|