MClx (M = Hg, Au, Ru; x = 2, 3) catalyzed hydrochlorination of acetylene — A density functional theory study

2013 ◽  
Vol 91 (2) ◽  
pp. 120-125 ◽  
Author(s):  
Mingyuan Zhu ◽  
Lihua Kang ◽  
Yan Su ◽  
Shanzheng Zhang ◽  
Bin Dai
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Chlorine Atom ◽  
Density Functional ◽  
Activation Barrier ◽  
Stable Complex ◽  
Atom Transfer ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Complex Species

Density functional theory (DFT) calculations were used to study the mechanism for the hydrochlorination of acetylene catalyzed by MClx (M = Hg, Au, Ru; x = 2, 3). For the three catalysts, the reaction occurs via a one-shift chlorine atom transfer, which avoids the formation of highly stable complex species. The adsorbed HCl acts as a chlorine donor, while the C2H2 favors the chlorine abstraction. The calculated real activation barrier decreases in the order: HgCl2 > AuCl3 > RuCl3, which suggests that the RuCl3 would be a good candidate catalyst for the hydrochlorination of acetylene.

Nitrogen induced phosphorene formation on the boron phosphide (111) surface: a density functional theory study

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108621-108626 ◽  
Author(s):  
J. Guerrero-Sánchez ◽  
M. Lopez-Fuentes ◽  
F. Sánchez-Ochoa ◽  
Noboru Takeuchi ◽  
Gregorio H. Cocoletzi
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Boron Phosphide

Nitrogen induced phosphorene formation on top of the BP (111) surface is investigated using periodic density functional theory (DFT) calculations.

Catalytic polymerization of naphthalene by HF/BF3 super acid: an ab initio density functional theory study

2018 ◽  
Vol 20 (36) ◽  
pp. 23311-23319 ◽  
Author(s):  
Po-Yu Yang ◽  
Hsing-Yin Chen ◽  
Shin-Pon Ju ◽  
Chia-Lin Chang ◽  
Gao-Shee Leu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Ab Initio ◽  
Density Functional ◽  
Catalytic Polymerization ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Detailed Reaction Mechanism ◽  
Super Acid

The detailed reaction mechanism of naphthalene catalytic polymerization by HF/BF3 has been investigated by DFT calculations and the directionality of the naphthalene-derived mesophase molecule has been explained.

Oxygen reduction reaction mechanism on P, N co-doped graphene: a density functional theory study

2019 ◽  
Vol 43 (48) ◽  
pp. 19308-19317 ◽  
Author(s):  
Zhao Liang ◽  
Chao Liu ◽  
Mingwei Chen ◽  
Xiaopeng Qi ◽  
Pramod Kumar U. ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Density Functional ◽  
Reduction Reaction ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Doped Graphene ◽  
Co Doped

DFT calculations confirmed that the P–N coupled site changed the ORR pathway and improved the catalytic activity compared with single doping.

scholarly journals Density functional theory (DFT) calculations of conformational energies and interconversion pathways in 1,2,7-thiadiazepane

2011 ◽  
Vol 76 (3) ◽  
pp. 395-406 ◽  
Author(s):  
Mina Haghdadi ◽  
Nahid Farokhi
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Activation Barrier ◽  
Stable Conformer ◽  
Functional Theory ◽  
Conformational Interconversion ◽  
Interconversion Barrier ◽  
The One ◽  
Twist Boat

The molecular structure and conformational analysis of 1,2,7-thiadiazapane conformers were investigated by density functional theory (DFT) calculations at the B3LYP/cc-pVDZ level of theory. Four twist-chair (TC), six twist-boat (TB), two boat (B), two chair (C) and four twist (T) conformers were identified as minima and transition states for 1,2,7-thiadiazepane. The TC1 conformer is the most stable conformer and the twist-chair conformers are predicted to be lower in energy than their corresponding boat and chair conformations. DFT predicts a small barrier to pseudo-rotation and a remarkable activation barrier for the conformational interconversion of the twist-chair conformers to their corresponding boat conformers. The simplest conformational process and the one with the lowest barrier is the degenerate interconversion of the twist-chair 3 (TC3) conformation with itself via the CS symmetric chair (C2) transition state. The calculated strain energy barrier for this process is 2.41 kJ mol-1. The highest conformational interconversion barrier is between TC2 and twistboat 3 (TB3) forms, which was found to be 75.62 kJ mol-1.

Effect of point defects on acetylene hydrogenation reaction over Ni(111) surface: a density functional theory study

2021 ◽  
Author(s):  
Pan Yin ◽  
Yao Jie ◽  
Xiao-Jie Zhao ◽  
Yu-Liang Feng ◽  
Tao Sun ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Point Defects ◽  
Density Functional ◽  
Hydrogenation Reaction ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Acetylene Hydrogenation

Density functional theory (DFT) calculations are carried out to investigate the effect of point defects on acetylene hydrogenation reaction over Ni(111) surface with three different defect concentrations (DC = 0.0500, 0.0625, and 0.0833), compared with the perfect Ni(111) surface.

Carbon–hydrogen vs. carbon–halogen oxidative addition of chlorobenzene to a cationic iridium(I) system — A density functional theory study

2009 ◽  
Vol 87 (10) ◽  
pp. 1460-1469 ◽  
Author(s):  
Hong Wu ◽  
Michael B. Hall
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Activation Barrier ◽  
Experimental Results ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
System A ◽  
Oxidative Additions ◽  
Calculated Activation ◽  
Calculated Activation Barrier

Density functional theory (DFT) is used to explore the competitive C−H and C−Cl oxidative additions (OA) of chlorobenzene to the cationic Ir(I) complex: [(PNP*)IrI]+ [PNP* = 2,6-bis((dimethylphosphino)methyl)pyridine]. Consistent with experimental results, the calculated activation barrier for C−H OA (ΔG‡ = 10.7 kcal mol–1) is lower than that for C−Cl OA (ΔG‡ = 19.7 kcal mol–1). However, the C−Cl OA product is calculated to be thermodynamically preferred as its ΔGo is 14.3 kcal mol–1 below that for the most stable C−H OA product.

A density functional theory study of complex species and reactions of Am(III)/Eu(III) with nitrate anions

2013 ◽  
Vol 40 (5) ◽  
pp. 379-386 ◽  
Author(s):  
Juan Xi ◽  
Jian-Hui Lan ◽  
Gui-Wu Lu ◽  
Yu-Liang Zhao ◽  
Zhi-Fang Chai ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Complex Species ◽  
Nitrate Anions

scholarly journals Palladium-catalysed methoxycarbonylation of ethene with bidentate diphosphine ligands: a density functional theory study

2020 ◽  
Vol 22 (42) ◽  
pp. 24330-24336
Author(s):  
Shahbaz Ahmad ◽  
L. Ellis Crawford ◽  
Michael Bühl
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Diphosphine Ligands ◽  
Density Functional Theory Study ◽  
Methyl Propionate ◽  
Functional Theory

The mechanism and origin of selectivity of Pd-catalysed formation of methyl propionate is elucidated through DFT calculations.

The effect of substitutional doping on Cu vacancy formation in Cu2O(111): A density functional theory study

2021 ◽  
Author(s):  
Ellaine Rose A. Beronio ◽  
Ivy R. Colambo ◽  
Allan Abraham Bustria Padama
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Vacancy Formation ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Substitutional Doping

Using density functional theory (DFT) calculations, we examine the effect of substitutional doping on the formation of Cu vacancies in Cu2O(111). Upon replacing coordinatively-unsaturated O with other elements (N, F,...

scholarly journals Density-Functional Theory Study of Hydrogen Induced Platelets in Silicon

2011 ◽  
Vol 1370 ◽  
Author(s):  
Liviu Bîlteanu ◽  
Jean-Paul Crocombette
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Stable Configuration ◽  
Density Functional Theory Study ◽  
Hydrogen Atoms ◽  
Functional Theory ◽  
Hydrogen Molecules ◽  
The One ◽  
Infinite Planar

ABSTRACTIn this contribution we present the results of Density-Functional Theory (DFT) calculations of platelets as modelled by infinite planar arrangements of hydrogen atoms and vacancies in (100) planes of silicon. From the observation of the relaxed platelet structures and the comparison of their energy with the one of hydrogen molecules dissolved in silicon we were able to evidence several features. A planar arrangement of hydrogen atoms inserted in the middle of Si-Si bonds proves unstable and Si bonds must be broken for the platelet to be stable. In the (100) plane the most stable configuration is the one with two Si-H bonds (a so-called SiH2 structure). It is possible to generate SiH3 structures which are more stable than hydrogen dissolved in Si bulk but less than SiH2 structures but SiH1 or SiH4 sometimes observed in experiments prove unstable.

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