Titanium-Promoted Dinitrogen Cleavage, Partial Hydrogenation, and Silylation

2009 ◽  
Vol 121 (40) ◽  
pp. 7551-7555 ◽  
Author(s):  
Grigory B. Nikiforov ◽  
Indu Vidyaratne ◽  
Sandro Gambarotta ◽  
Ilia Korobkov
Keyword(s):  
Partial Hydrogenation ◽  
Dinitrogen Cleavage

Dinitrogen Cleavage and Hydrogenation by a Trinuclear Titanium Polyhydride Complex

Science ◽  
2013 ◽  
Vol 340 (6140) ◽  
pp. 1549-1552 ◽  
Author(s):  
Takanori Shima ◽  
Shaowei Hu ◽  
Gen Luo ◽  
Xiaohui Kang ◽  
Yi Luo ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ambient Temperature ◽  
Triple Bond ◽  
Partial Hydrogenation ◽  
Computational Studies ◽  
X Ray ◽  
Temperature And Pressure ◽  
Dinitrogen Cleavage ◽  
Intramolecular Hydrogen

Both the Haber-Bosch and biological ammonia syntheses are thought to rely on the cooperation of multiple metals in breaking the strong N≡N triple bond and forming an N–H bond. This has spurred investigations of the reactivity of molecular multimetallic hydrides with dinitrogen. We report here the reaction of a trinuclear titanium polyhydride complex with dinitrogen, which induces dinitrogen cleavage and partial hydrogenation at ambient temperature and pressure. By 1H and 15N nuclear magnetic resonance, x-ray crystallographic, and computational studies of some key reaction steps and products, we have determined that the dinitrogen (N2) reduction proceeds sequentially through scission of a N2 molecule bonded to three Ti atoms in a μ-η1:η2:η2-end-on-side-on fashion to give a μ2-N/μ3-N dinitrido species, followed by intramolecular hydrogen migration from Ti to the μ2-N nitrido unit.

Titanium-Promoted Dinitrogen Cleavage, Partial Hydrogenation, and Silylation

2009 ◽  
Vol 48 (40) ◽  
pp. 7415-7419 ◽  
Author(s):  
Grigory B. Nikiforov ◽  
Indu Vidyaratne ◽  
Sandro Gambarotta ◽  
Ilia Korobkov
Keyword(s):  
Partial Hydrogenation ◽  
Dinitrogen Cleavage

scholarly journals Low-temperature and atmospheric pressure plasma for palm biodiesel hydrogenation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Grittima Kongprawes ◽  
Doonyapong Wongsawaeng ◽  
Kanokwan Ngaosuwan ◽  
Worapon Kiatkittipong ◽  
Suttichai Assabumrungrat
Keyword(s):  
Fatty Acid ◽  
Cloud Point ◽  
Atmospheric Pressure ◽  
Oxidation Stability ◽  
Acid Methyl Ester ◽  
Energy Utilization ◽  
Superior Performance ◽  
Partial Hydrogenation ◽  
Dbd Plasma ◽  
Plasma Hydrogenation

AbstractPartially hydrogenated fatty acid methyl ester (H-FAME) is conventionally produced through partial hydrogenation under high pressure and elevated temperature in the presence of a catalyst. Herein, a novel green, catalyst-free, non-thermal and atmospheric pressure dielectric barrier discharge (DBD) plasma was employed instead of a conventional method to hydrogenate palm FAME. H-FAME became more saturated with the conversion of C18:2 and C18:3 of 47.4 and 100%, respectively, at 100 W input power, 1 mm gas-filled gap size and 80% H2 in the mixed gas at room temperature for 5 h, causing a reduction of the iodine value from 50.2 to 43.5. Oxidation stability increased from 12.8 to 20 h while a cloud point changed from 13.5 to 16 °C. Interestingly, DBD plasma hydrogenation resulted in no trans-fatty acid formation which provided a positive effect on the cloud point. This green DBD plasma system showed a superior performance to a conventional catalytic reaction. It is an alternative method that is safe from explosion due to the mild operating condition, as well as being highly environmentally friendly by reducing waste and energy utilization from the regeneration process required for a catalytic process. This novel green plasma hydrogenation technique could also be applied to other liquid-based processes.

Partial hydrogenation of a C18:3-rich FAME mixture over Pd/C

2020 ◽  
Vol 157 ◽  
pp. 33-42
Author(s):  
Eugenio Quaranta ◽  
Daniele Cornacchia
Keyword(s):  
Partial Hydrogenation

Ru–Cd/Bentonite for the Partial Hydrogenation of Benzene: A Catalyst without Additives

ChemCatChem ◽  
2012 ◽  
Vol 4 (11) ◽  
pp. 1836-1843 ◽  
Author(s):  
Weitao Wang ◽  
Huizhen Liu ◽  
Guodong Ding ◽  
Peng Zhang ◽  
Tianbin Wu ◽  
...  
Keyword(s):  
Partial Hydrogenation ◽  
Partial Hydrogenation Of Benzene

The Partial Hydrogenation of Difurfuralacetone and Related Compounds

1950 ◽  
Vol 72 (12) ◽  
pp. 5506-5507 ◽  
Author(s):  
Kliem Alexander ◽  
L. S. Hafner ◽  
George H. Smith ◽  
L. E. Schniepp
Keyword(s):  
Partial Hydrogenation ◽  
Related Compounds

The Partial Hydrogenation of Triolein

1950 ◽  
Vol 72 (10) ◽  
pp. 4356-4359 ◽  
Author(s):  
James H. Benedict ◽  
B. F. Daubert
Keyword(s):  
Partial Hydrogenation
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