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Ngubane NP, Akiri SO, Omondi B, Ojwach SO. Syntheses of N^O-donor palladium(II) complexes and applications as recyclable catalysts in biphasic methoxycarbonylation of alkenes. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Song H, Lei S, Jin F, Liu H. Methoxycarbonylation of diisobutylene into methyl isononanoate catalyzed by cobalt complexes supported with porous organic polymers. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Akiri SO, Ojwach SO. Sterically hindered (pyridyl)benzamidine palladium(II) complexes: Syntheses, structural studies, and applications as catalysts in the methoxycarbonylation of olefins. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Saphan O. Akiri
- School of Chemistry and Physics University of KwaZulu‐Natal Pietermaritzburg South Africa
| | - Stephen O. Ojwach
- School of Chemistry and Physics University of KwaZulu‐Natal Pietermaritzburg South Africa
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Structural elucidation of chiral (imino)pyridine/phosphine palladium(II) complexes and their applications as catalysts in methoxycarbonylation of styrene. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Akiri SO, Ojwach SO. Structural studies and applications of water soluble (phenoxy)imine palladium(II) complexes as catalysts in biphasic methoxycarbonylation of 1-hexene. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Palladium(II) complexes of (pyridyl)imine ligands as catalysts for the methoxycarbonylation of olefins. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119270] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Zulu S, Alam M, Ojwach SO, Akerman MP. Structural and theoretical studies of the methoxycarbonylation of higher olefins catalysed by (Pyrazolyl‐ethyl)pyridine palladium (II) complexes. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Siyabonga Zulu
- School of Chemistry and PhysicsPietermaritzburg Campus, University of KwaZulu‐Natal Private Bag X01 Scottsville 3209 South Africa
| | - Mohd.G. Alam
- School of Chemistry and PhysicsPietermaritzburg Campus, University of KwaZulu‐Natal Private Bag X01 Scottsville 3209 South Africa
| | - Stephen O. Ojwach
- School of Chemistry and PhysicsPietermaritzburg Campus, University of KwaZulu‐Natal Private Bag X01 Scottsville 3209 South Africa
| | - Matthew P. Akerman
- School of Chemistry and PhysicsPietermaritzburg Campus, University of KwaZulu‐Natal Private Bag X01 Scottsville 3209 South Africa
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Synthesis of MCM-41 Immobilized (Phenoxy)Imine Palladium(II) Complexes as Recyclable Catalysts in the Methoxycarbonylation of 1-Hexene. Catalysts 2019. [DOI: 10.3390/catal9020143] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The immobilization of 2-phenyl-2-((3(tryethoxysicyl)propyl)imino)ethanol (HL1) and 4-methyl-2-(((3(triethoxysilyl)propyl)imino)methyl)phenol (HL2) on MCM-41 afforded the respective ligands HL1-MCM-41 (HL3) and HL2-MCM-41 (HL4). The treatment of complexes Pd(L1)2 and Pd(L2)2 with MCM-41 afforded the immobilized complexes (Pd(L1)2)-MCM-41 (1) and (Pd(L2)2)-MCM-41 (2) respectively. Separately, the reactions of HL3 and HL4 with Pd(NCMe)2Cl2 produced the immobilized complexes Pd(HL3)Cl2 (3) and Pd(HL4)Cl2 (4) respectively. The immobilized compounds were characterized by FT-IR, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), energy-dispersive X-ray (EDX), Thermogravimetric Analysis (TGA) and X-ray Powder Diffraction (XRD). All the complexes (1–4) formed active catalysts in the methoxycarbonylation of 1-hexene to give linear and branched esters. The catalysts were recycled four times without the loss of catalytic activity. Hot filtration experiments established the absence of leaching, and the heterogeneous nature of the active species was derived from mercury drop experiments.
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