Rhodium catalyzed hydroformylation of water insoluble olefins in the presence of chemically modified β-cyclodextrins: evidence for ligand-cyclodextrin interactions and effect of various parameters on the activity and the aldehydes selectivity

High‐Pressure 31P{1H} NMR Studies of RhH(CO)(TPPTS)3 in the Presence of Methylated Cyclodextrins: New Light on Rhodium‐Catalyzed Hydroformylation Reaction Assisted by Cyclodextrins

“…The latter signal is characteristic of the formation of an inclusion complex between TPPTS and RAME-b-CD. [8,9] In this case, the decoordinated TPPTS ligand represented 51% of the phosphorus. This clearly indicates that the free TPPTS which is formed in the equilibria between 1, 2, 3 and 4 has a natural tendency to associate to RAME-b-CD.…”

“…[7] Unfortunately, the normal to branched aldehydes ratio was always lower than that observed without a mass-transfer promoter (1.8 vs. 2.7 without cyclodextrin). [8] This unexpected decrease in the normal to branched aldehydes ratio is the major drawback of the cyclodextrin-based hydroformylation process as the linear aldehyde is the more desired product. The origin of this decrease is not yet elucidated.…”

Hydroformylation reactions of the trans-Mo(CO)4(p-C5NH4SO3NA)2 complex in biphasic medium

“…A real naphtha cut used was from the El Palito refinery, Venezuela. The trans-Mo(CO) 4 (p-PySO 3 Na) 2 (1) complex used in the catalytic runs is prepared as reported in [1].…”

“…Recently, we reported olefin and naphtha hydroformylation using mononuclear rhodium complexes with water soluble phosphines [9][10], and with molybdenum complexes [11]. Here we report olefin and refinery naphtha hydroformylation with trans-Mo(CO) 4 (p-PySO 3 Na) 2 (1) in a toluene/water biphasic medium.…”

“…E-mail: suarez@ula.ve phosphine ligands has increased [1][2]. For example, water soluble rhodium complexes have been used in the hydroformylation of propene [3][4][5][6], oleic alcohol, 1-octene and dicyclopentadiene hydroformylation [7] and a review article describes aqueous biphasic hydroformylation with rhodium complexes [8]. Recently, we reported olefin and naphtha hydroformylation using mononuclear rhodium complexes with water soluble phosphines [9][10], and with molybdenum complexes [11].…”