Kinetik der isomerisierenden Hydroformylierung von trans‐4‐Octen

Abstract

No abstracts.

Highly selective hydroformylation of internal and terminal olefins to terminal aldehydes using a rhodium-BIPHEPHOS-catalyst system

“…The isomerization is a reaction with a quite high velocity. This is very well shown by Behr et al [11]. So, 1-hexene 3 isomerizes to 2-hexene 3a and 3-hexene 3b until a equilibration state is reached.…”

Rhodium-Biphephos-Catalyzed Tandem Isomerization–Hydroformylation of Oleonitrile

“…Rhodium-catalyzed tandem isomerization-hydroformylation of middle-chain alkenes (<10 C) has been widely studied over the last two decades, generally with bulky ligands [7,8]. Regioselectivities in the range l/b = 95:5-98:2 were obtained with 2-alkenes (e.g., 2-hexene, 2-octene) [9][10][11][12][13][14], while with 4-octene regioselectivities up to l/b = 89:11 were observed [15,16]. On the other hand, the hydroformylation of long-chain alkenes (>10 C), with a C=C bond in a deep internal position (>5 C away), remains poorly documented.…”

Continuous Gas‐Phase Hydroformylation of a Highly Diluted Technical C4 Feed using Supported Ionic Liquid Phase Catalysts

“…From the slope of the Arrhenius plot in Figure 4, the apparent activation energy was calculated to be 76.7 kJ mol À1 . [12] Interestingly, the selectivity towards n-pentanal was enhanced with increasing temperature from 88.8 (100 8C) to 93.1 % (140 8C). [12] Interestingly, the selectivity towards n-pentanal was enhanced with increasing temperature from 88.8 (100 8C) to 93.1 % (140 8C).…”

“…This value is indicative of kinetic control of the hydroformylation reaction and is in good agreement with previously published data for similar SILP catalysts [3,4] and homogeneously catalyzed hydroformylation reactions. [12] Interestingly, the selectivity towards n-pentanal was enhanced with increasing temperature from 88.8 (100 8C) to 93.1 % (140 8C). At the same time, the amount of 2butenes in the reaction mixture decreased slightly from 98.2 to 97.5 %.…”