Fluorine Substitution Effect on the Reaction Pathways of CH3CH2(a) and CF3CH2(a) on Ag(111)

2004 ◽  
Vol 108 (23) ◽  
pp. 7911-7916 ◽  
Author(s):  
W. X. Huang ◽  
J. M. White
Keyword(s):  
Substitution Effect ◽  
Reaction Pathways ◽  
Fluorine Substitution

Melt rheological properties of ETFE: an attempt to illuminate the fluorine-substitution effect

2012 ◽  
Vol 69 (3) ◽  
pp. 375-388 ◽  
Author(s):  
Xiao-Yong Chen ◽  
Wang Zhang Yuan ◽  
Fei Ai ◽  
Hong Li ◽  
Lei Li ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Substitution Effect ◽  
Fluorine Substitution

Unusual Fluorine Substitution Effect on S···Cl Bonding between Sulfides and Atomic Chlorine

2018 ◽  
Vol 122 (36) ◽  
pp. 7142-7150 ◽  
Author(s):  
Dipankar Sutradhar ◽  
Sumitra Bhattarai ◽  
Therese Zeegers-Huyskens ◽  
Asit K. Chandra
Keyword(s):  
Substitution Effect ◽  
Fluorine Substitution ◽  
Atomic Chlorine

Fluorine substitution effect in bis(imino)pyridine cobalt complex in propylene oligomerization

2017 ◽  
Vol 296 ◽  
pp. 272-276
Author(s):  
Anna Paula Rodrigues Ehlert ◽  
Eduardo Miraglia Carvalho ◽  
Daniel Thiele ◽  
Cristiano Favero ◽  
Isabel Vicente ◽  
...  
Keyword(s):  
Cobalt Complex ◽  
Substitution Effect ◽  
Fluorine Substitution

Reactions of an Aluminium(I) Reagent with 1,2-, 1,3- and 1,5-Dienes: Dearomatisation, Reversibility, and a Pericyclic Mechanism

2019 ◽  
Author(s):  
Clare Bakewell ◽  
Martí Garçon ◽  
Richard Y Kong ◽  
Louisa O'Hare ◽  
Andrew J. P. White ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Dft Calculations ◽  
Transition State ◽  
Reaction Pathways ◽  
Aromatic Rings ◽  
Aromatic Character ◽  
Pericyclic Reaction

The reactions of an aluminium(I) reagent with a series of 1,2-, 1,3- and 1,5-dienes are reported. In the case of 1,3-dienes the reaction occurs by a pericyclic reaction mechanism, specifically a cheletropic cycloaddition, to form aluminocyclopentene containing products. This mechanism has been interrogated by stereochemical experiments and DFT calculations. The stereochemical experiments show that the (4+1) cycloaddition follows a suprafacial topology, while calculations support a concerted albeit asynchronous pathway in which the transition state demonstrates aromatic character. Remarkably, the substrate scope of the (4+1) cycloaddition includes dienes that are either in part, or entirely, contained within aromatic rings. In these cases, reactions occur with dearomatisation of the substrate and can be reversible. In the case of 1,2- or 1,5-dienes complementary reactivity is observed; the orthogonal nature of the C=C π-bonds (1,2-diene) and the homoconjugated system (1,5-diene) both disfavour a (4+1) cycloaddition. Rather, reaction pathways are determined by an initial (2+1) cycloaddition to form an aluminocyclopropane intermediate which can in turn undergo insertion of a further C=C π-bond leading to complex organometallic products that incorporate fused hydrocarbon rings.

Gold Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Reaction Pathways to Access 1,3-Aminoalcohols, 3-Hydroxyketones or 3-Aminoketones

2018 ◽  
Author(s):  
Victor Laserna ◽  
Tom Sheppard
Keyword(s):  
Gold Catalysis ◽  
Reaction Pathways ◽  
High Yield ◽  
Reaction Conditions ◽  
Propargylic Alcohols ◽  
Catalytic Quantity ◽  
Selective Formation ◽  
General Method

A versatile approach to the valorization of propargylic alcohols is reported, enabling controlled access to three different products from the same starting materials. Firstly, a general method for the hydroamination of propargylic alcohols with anilines is described using gold catalysis to give 3-hydroxy imines with complete regioselectivity. These 3-hydroxyimines can be reduced to give 1,3-aminoalcohols with high syn seletivity. Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway.<br>

Fundamental reaction pathways during coprocessing: Quarterly status and milestone report

1988 ◽  
Author(s):  
L. M. Stock ◽  
J. G. Gatsis ◽  
Kadim Ceylan ◽  
Kofi Ofosu-Asante
Keyword(s):  
Reaction Pathways
Sign in / Sign up

Export Citation Format

Share Document