Adsorption of 2-propanol and propene on H-ZSM-5: evidence for stable carbenium ion formation

1985 ◽  
Vol 89 (7) ◽  
pp. 1305-1308 ◽  
Author(s):  
M. C. Grady ◽  
Raymond J. Gorte
Keyword(s):  
Ion Formation ◽  
Carbenium Ion

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.

Carbenium ion formation by fragmentation of electrochemically generated oxonium ions

2018 ◽  
Vol 16 (28) ◽  
pp. 5094-5096 ◽  
Author(s):  
Anna Lielpetere ◽  
Aigars Jirgensons
Keyword(s):  
Oxidation Potential ◽  
Carbenium Ions ◽  
Ion Formation ◽  
Oxonium Ions ◽  
Carbenium Ion

Fragmentation of electrochemically generated oxonium ions can be exploited to form carbenium ions at a low oxidation potential in the presence of a nucleophile such as allylsilane.

Ferrous ion formation by ferrioxamine prepared from aged desferrioxamine: A potential prooxidant property

1994 ◽  
Vol 16 (6) ◽  
pp. 733-739 ◽  
Author(s):  
John M.C. Gutteridge ◽  
Gregory J. Quinlan ◽  
Jason Swain ◽  
James Cox
Keyword(s):  
Ferrous Ion ◽  
Ion Formation

An efficient method for 3, 4‐dihydroisoquinolinium ion formation, leading to a facile introduction of nucleophiles

2020 ◽  
Author(s):  
Makoto Shimizu ◽  
Takato Kawamura ◽  
Shinya Fukumoto ◽  
Isao Mizota ◽  
Yusong Zhu
Keyword(s):  
Efficient Method ◽  
Ion Formation

Temporary negative ion formation in interactions of low-energy inert gas ions (He+, Ne+) with Cs-adsorbed Cu(111) surfaces

1995 ◽  
Vol 341 (1-2) ◽  
pp. 19-28 ◽  
Author(s):  
Q.B. Lu ◽  
D.J. O'Connor ◽  
B.V. King ◽  
Y.G. Shen ◽  
R.J. MacDonald
Keyword(s):  
Low Energy ◽  
Inert Gas ◽  
Negative Ion ◽  
Ion Formation
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