TY - JOUR
T1 - Gas-phase Meerwein-Ponndorf-Verley reaction
T2 - Correlation of the 3665 cm-1 IR band with the cis-alcohol selectivity
AU - Akata, Burcu
AU - Warzywoda, Juliusz
AU - Sacco, Albert
N1 - Funding Information:
The authors thank NASA for financial support.
PY - 2004/3/10
Y1 - 2004/3/10
N2 - The two Lewis acid sites assumed to catalyze the Meerwein-Ponndorf-Verley (MPV) reaction are identified by IR bands at 3782 and 3660-3680 cm -1. Different combinations of heat-treatment protocols were used and the results indicated that the final temperature, ramp rate, and gas environment make a difference in the relative intensities of the 3782 and 3665 cm-1 bands. Combining different heat-treatment procedures, samples were produced where the 3782 and 3665 cm-1 band intensities moved in opposite directions (i.e., one increasing and the other decreasing). The MPV reduction of 4-tert-butylcyclohexanone with 2-propanol in the gas phase was studied at 100°C in a nitrogen atmosphere. The increasing trend of the relative intensity of the 3665 cm-1 band showed a correlation in favor of the formation of cis-4-tert-butylcyclohexanol (cis-4-TBCHL). This suggests that the species associated with the 3665 cm-1 band are likely responsible for cis-4-TBCHL selectivity.
AB - The two Lewis acid sites assumed to catalyze the Meerwein-Ponndorf-Verley (MPV) reaction are identified by IR bands at 3782 and 3660-3680 cm -1. Different combinations of heat-treatment protocols were used and the results indicated that the final temperature, ramp rate, and gas environment make a difference in the relative intensities of the 3782 and 3665 cm-1 bands. Combining different heat-treatment procedures, samples were produced where the 3782 and 3665 cm-1 band intensities moved in opposite directions (i.e., one increasing and the other decreasing). The MPV reduction of 4-tert-butylcyclohexanone with 2-propanol in the gas phase was studied at 100°C in a nitrogen atmosphere. The increasing trend of the relative intensity of the 3665 cm-1 band showed a correlation in favor of the formation of cis-4-tert-butylcyclohexanol (cis-4-TBCHL). This suggests that the species associated with the 3665 cm-1 band are likely responsible for cis-4-TBCHL selectivity.
KW - IR spectroscopy
KW - Lewis acidity
KW - Meerwein-Ponndorf-Verley reaction
KW - Zeolite Beta
UR - http://www.scopus.com/inward/record.url?scp=1542268257&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2003.11.008
DO - 10.1016/j.jcat.2003.11.008
M3 - Article
AN - SCOPUS:1542268257
SN - 0021-9517
VL - 222
SP - 397
EP - 403
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 2
ER -