Isomerization and Hydroformylation of Long-Chain Olefins Promoted by N^O Bidentate Rh(I) Catalysts Precursors Bearing Salicylaldimine and Naphthaldimine Supporting Ligands
Pamela N. Sekoto, James Darkwa, Banothile C. E. Makhubela, Thandeka A. Tshabalala
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Abstract
A series of Schiff-base rhodium(I) complexes (C1–C8) chelating N^O salicylaldimine and naphthaldimine ligands have been synthesized and characterized. These complexes were evaluated for their ability to catalyse the isomerization and hydroformylation of terminal (1-octene and 1-decene) and internal olefins (1, 2-, 3-, and 4-octene) to linear and branched aldehydes. The pre-catalysts resulted in excellent substrate conversion (> 99%) with 100% chemoselectivity towards aldehydes, under mild conditions. Good regioselectivities towards branched aldehydes were observed from terminal and internal olefins, clearly demonstrating the catalysts' ability in thermodynamically favoured isomerization followed by hydroformylation (n/iso ratio ranging between 0.52 and 0.67).
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All new compounds should be satisfactorily identified and proof of their structure given according to generally accepted standards. Structural reports, such as papers exclusively dealing with synthesis and characterization, analytical techniques, or X-ray diffraction studies of metal-organic or organometallic compounds will not be considered. The editors reserve the right to refuse without peer review any manuscript that does not comply with the aims and scope of the journal. Applied Organometallic Chemistry publishes Full Papers, Reviews, Mini Reviews and Communications of scientific research in all areas of organometallic and metal-organic chemistry involving main group metals, transition metals, lanthanides and actinides. All contributions should contain an explicit application of novel compounds, for instance in materials science, nano science, catalysis, chemical vapour deposition, metal-mediated organic synthesis, polymers, bio-organometallics, metallo-therapy, metallo-diagnostics and medicine. Reviews of books covering aspects of the fields of focus are also published.
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