NMR Observation of Indanyl Carbenium Ion Intermediates in the Reactions of Hydrocarbons on Acidic Zeolites

1994 ◽  
Vol 116 (22) ◽  
pp. 10188-10195 ◽  
Author(s):  
Teng Xu ◽  
James F. Haw
Keyword(s):  
Carbenium Ion ◽  
Acidic Zeolites

Aromatization of C2-C6 Aliphatic Hydrocarbons on Copper-Containing ZSM-5 Zeolites

1992 ◽  
Vol 57 (12) ◽  
pp. 2553-2560
Author(s):  
Zdravka Popova ◽  
Katia Aristirova ◽  
Christo Dimitrov
Keyword(s):  
Copper Content ◽  
Acid Strength ◽  
The State ◽  
Aliphatic Hydrocarbons ◽  
Bronsted Acid ◽  
Ion Formation ◽  
Brönsted Acid ◽  
Wide Range ◽  
Carbenium Ion ◽  
Acid Centers

The aromatization of a wide range of model aliphatic and cycloaliphatic hydrocarbons (ethene, ethane, propene, n-hexane, 1-hexene, methylcyclopentane, cyclohexane, cyclohexene) on copper-containing NaZSM-5 and HZSM-5 zeolites has been investigated. It was established that the degree of aromatization is related to carbenium ion formation and depends on the acid strength and copper content of zeolite. Experiments with copper-containing samples reduced prior to use indicated the possibility to enhance the selectivity to aromatization. The change of the state of Cu2+ ions during catalytic experiments confirmed the assumption about participation of Cu0 simultaneously with the Bronsted acid centers in the dehydrogenation/hydrogenation steps.

scholarly journals Influence of Confinement on Barriers for Alkoxide Formation in Acidic Zeolites

ChemCatChem ◽  
2021 ◽  
Author(s):  
Michal Fečík ◽  
Philipp N. Plessow ◽  
Felix Studt
Keyword(s):  
Acidic Zeolites

Carbenium ion trapping using sulfonamides: an acid-catalysed synthesis of pyrrolidines by intramolecular hydroamination

Tetrahedron ◽  
2010 ◽  
Vol 66 (23) ◽  
pp. 4150-4166 ◽  
Author(s):  
Charlotte M. Griffiths-Jones (née Haskins) ◽  
David W. Knight
Keyword(s):  
Ion Trapping ◽  
Carbenium Ion

A DFT Study of Isomerization and Transalkylation Reactions of Aromatic Species Catalyzed by Acidic Zeolites

2001 ◽  
Vol 202 (1) ◽  
pp. 141-155 ◽  
Author(s):  
Xavier Rozanska ◽  
Xavier Saintigny ◽  
Rutger A van Santen ◽  
François Hutschka
Keyword(s):  
Dft Study ◽  
Aromatic Species ◽  
Acidic Zeolites

Acceleration of Cope rearrangement by a remote carbenium ion center: theoretical elucidation of the electronic origin

1990 ◽  
Vol 55 (11) ◽  
pp. 3455-3457 ◽  
Author(s):  
S. Lalitha ◽  
Jayaraman Chandrasekhar ◽  
Goverdhan Mehta
Keyword(s):  
Cope Rearrangement ◽  
Carbenium Ion
Sign in / Sign up

Export Citation Format

Share Document