Benzene - Serrata
... Society organized an elaborate appreciation in Kekulé's honour, celebrating the twenty-fifth anniversary of his first benzene paper. Here Kekulé spoke of the creation of the theory. He said that he had discovered the ring shape of the benzene molecule after having a reverie or day-dream of a snake s ...
... Society organized an elaborate appreciation in Kekulé's honour, celebrating the twenty-fifth anniversary of his first benzene paper. Here Kekulé spoke of the creation of the theory. He said that he had discovered the ring shape of the benzene molecule after having a reverie or day-dream of a snake s ...
Notes 6 - Macdonald Research Group
... articles that I have given you. These include Lewis acids from H+ to many of the main group elements from the s- and p-blocks. NHCs acting as Lewis acids are essentially unknown, while transient carbenes and some of Bertrand’s carbenes do exhibit such reactivity. ...
... articles that I have given you. These include Lewis acids from H+ to many of the main group elements from the s- and p-blocks. NHCs acting as Lewis acids are essentially unknown, while transient carbenes and some of Bertrand’s carbenes do exhibit such reactivity. ...
Substituent groups in aryl- and arylalkylphosphanes: effects on
... as ligands. The most straightforward way to affect the chemical behavior of a metal ion is through change in its ligands. It is well recognized that changes within the first coordination sphere of a metal ion can have a relatively dramatic impact on the properties of the entire complex, whereas modi ...
... as ligands. The most straightforward way to affect the chemical behavior of a metal ion is through change in its ligands. It is well recognized that changes within the first coordination sphere of a metal ion can have a relatively dramatic impact on the properties of the entire complex, whereas modi ...
Reactions of Transition Metal Complexes with Fullerenes (C60, C70
... chemists for manipulation.3,4 A portion of that synthetic manipulation has involved examination of the reactivity of the fullerenes toward transition metal compounds, which is the subject of this review. The majority of studies of fullerene chemistry have involved C60, which is the most abundant spe ...
... chemists for manipulation.3,4 A portion of that synthetic manipulation has involved examination of the reactivity of the fullerenes toward transition metal compounds, which is the subject of this review. The majority of studies of fullerene chemistry have involved C60, which is the most abundant spe ...
Removal of hydrogen fluoride from gas streams
... Figure 2.2:Thermogravimetric curve for CaF2 (BDH) after exposure to 10% HF/N2 at room temperature............................................ 43 Figure 2.3:Thermogravimetric curve for CaF2 (Saarchem) after exposure to 10% HF/N2 at room temperature ........................ 43 Figure 2.4:Thermogravime ...
... Figure 2.2:Thermogravimetric curve for CaF2 (BDH) after exposure to 10% HF/N2 at room temperature............................................ 43 Figure 2.3:Thermogravimetric curve for CaF2 (Saarchem) after exposure to 10% HF/N2 at room temperature ........................ 43 Figure 2.4:Thermogravime ...
ON THE ROAD TO CARBENE AND CARBYNE COMPLEXES
... positively polarised, and the Cr (CO)5 part is negatively polarised. The dipole moments of the complexes are therefore also relatively high, about 5 Debye. In what follows, I would not like to go into the details of the spectroscopic studies as such. It may, however, be pointed out briefly that 13C- ...
... positively polarised, and the Cr (CO)5 part is negatively polarised. The dipole moments of the complexes are therefore also relatively high, about 5 Debye. In what follows, I would not like to go into the details of the spectroscopic studies as such. It may, however, be pointed out briefly that 13C- ...
Chem. Mater., 18 (7), 1745-1752
... has recently encompassed silicates and sulfates, lithium metal fluorophosphates have emerged as promising candidates. These have analogues in the mineral world as hydroxyl-containing compounds where F- partially or completely replaces an OH- group, such as calcium hydroxyfluoroapatite. However, to b ...
... has recently encompassed silicates and sulfates, lithium metal fluorophosphates have emerged as promising candidates. These have analogues in the mineral world as hydroxyl-containing compounds where F- partially or completely replaces an OH- group, such as calcium hydroxyfluoroapatite. However, to b ...
on Carbon Nanotube: An X-ray Absorption Near
... features are noted from the TEY. First, π* transition around 285 eV in the nanocomposites is shifted by ∼0.3 eV to lower photon energy from that of MWNTs. The presence of π* transition in MWNT/RuO2 shows that the graphitic framework of the MWNT remains intact upon the coating of RuO2. Thus good elec ...
... features are noted from the TEY. First, π* transition around 285 eV in the nanocomposites is shifted by ∼0.3 eV to lower photon energy from that of MWNTs. The presence of π* transition in MWNT/RuO2 shows that the graphitic framework of the MWNT remains intact upon the coating of RuO2. Thus good elec ...
Energetics
... Standard enthalpy changes CH4(g) + 2O2(g) CO2(g) + 2H2O(g) H = -802 kJ mol-1 at 373 K CH4(g) + 2O2(g) CO2(g) + 2H2O(l) H = -890 kJ mol-1 at 298 K ...
... Standard enthalpy changes CH4(g) + 2O2(g) CO2(g) + 2H2O(g) H = -802 kJ mol-1 at 373 K CH4(g) + 2O2(g) CO2(g) + 2H2O(l) H = -890 kJ mol-1 at 298 K ...
APPLIED PHYSICS REVIEWS Ion and electron irradiation
... industrially very important ion implantation onto semiconductors.4 This application motivated further studies of defect production under irradiation because each implanted atom creates many lattice defects in the sample.5 Another important example of a positive effect of irradiation coming from biop ...
... industrially very important ion implantation onto semiconductors.4 This application motivated further studies of defect production under irradiation because each implanted atom creates many lattice defects in the sample.5 Another important example of a positive effect of irradiation coming from biop ...
Structurally simple
... central ‘hole’ of a large cyclic molecule, giving structures which often form channels when stacked in the solid state. Alternatively, CO2 may adsorb inside a ‘cage’-like molecule (e.g., carcerands or hemicarcerands). Adsorption into the space generated between molecules in the solid-state is also q ...
... central ‘hole’ of a large cyclic molecule, giving structures which often form channels when stacked in the solid state. Alternatively, CO2 may adsorb inside a ‘cage’-like molecule (e.g., carcerands or hemicarcerands). Adsorption into the space generated between molecules in the solid-state is also q ...
Noncovalent interactions of molecules with single walled carbon
... Iijima has been credited for elucidating the structure of NTs. Iijima and co-workers9 and, independently, Bethune and coworkers at IBM10 controllably grew single-walled carbon nanotubes. The closed end of a nanotube was seen to resemble half of a fullerene, and ‘‘buckytubes’’ were quickly picked up ...
... Iijima has been credited for elucidating the structure of NTs. Iijima and co-workers9 and, independently, Bethune and coworkers at IBM10 controllably grew single-walled carbon nanotubes. The closed end of a nanotube was seen to resemble half of a fullerene, and ‘‘buckytubes’’ were quickly picked up ...
Chapter 1: General Introduction
... donation into the empty carbene p–orbital. It has been shown how there may be double bonding between the metal and the oxygen atom. The former attacking nucleophile is usually a carbon substituent (sp, sp2, sp3–C) and less stabilization, through π–interaction, is expected to come from a carbon subst ...
... donation into the empty carbene p–orbital. It has been shown how there may be double bonding between the metal and the oxygen atom. The former attacking nucleophile is usually a carbon substituent (sp, sp2, sp3–C) and less stabilization, through π–interaction, is expected to come from a carbon subst ...
Cyanide Geochemistry - University of Manitoba
... NaAu(CN)2+ Zn = NaZn(CN)2 + Au • Au precipitates as a solid. • Early zinc precipitation systems simply used a wooden box filled with zinc chips. They were very inefficient and much of the dissolved gold remained in solution. • The Merrill-Crowe process works better than the early zinc boxes because ...
... NaAu(CN)2+ Zn = NaZn(CN)2 + Au • Au precipitates as a solid. • Early zinc precipitation systems simply used a wooden box filled with zinc chips. They were very inefficient and much of the dissolved gold remained in solution. • The Merrill-Crowe process works better than the early zinc boxes because ...
THE RISE OF GRAPHENE A.K. Geim and K.S. Novoselov
... A.K. Geim and K.S. Novoselov Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, Oxford Road M13 9PL, United Kingdom Graphene is a rapidly rising star on the horizon of materials science and condensed matter physics. This strictly two-dimensional material exhibits excepti ...
... A.K. Geim and K.S. Novoselov Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, Oxford Road M13 9PL, United Kingdom Graphene is a rapidly rising star on the horizon of materials science and condensed matter physics. This strictly two-dimensional material exhibits excepti ...
Fulltext PDF
... under this category can be used as feedstock chemicals. In another category of reactions, the oxidation state of CO2 is reduced by at least two units. These are energy-consuming processes and energy is provided in the form of electrons, photons or hydrogen. The products formed under this category ar ...
... under this category can be used as feedstock chemicals. In another category of reactions, the oxidation state of CO2 is reduced by at least two units. These are energy-consuming processes and energy is provided in the form of electrons, photons or hydrogen. The products formed under this category ar ...
ligand design - UZH - Department of Chemistry
... containing pi acceptor ligands These are electrophilic at the alpha carbon count as neutral two containing pi‐acceptor ligands. These are electrophilic at the alpha‐carbon, count as neutral two‐ electron donor ligands, their ligation being similar to CO. We can draw a resonance structure as follows ...
... containing pi acceptor ligands These are electrophilic at the alpha carbon count as neutral two containing pi‐acceptor ligands. These are electrophilic at the alpha‐carbon, count as neutral two‐ electron donor ligands, their ligation being similar to CO. We can draw a resonance structure as follows ...
Designation:
... resulting mineral. (Graphite and diamonds are both made of elemental carbon, but are two totally different end products!) Finally, some substances can occur in multiple crystal forms called polymorphs (graphite and diamonds are polymorphs of carbon). Thus, while the chemistry needs to be exact it al ...
... resulting mineral. (Graphite and diamonds are both made of elemental carbon, but are two totally different end products!) Finally, some substances can occur in multiple crystal forms called polymorphs (graphite and diamonds are polymorphs of carbon). Thus, while the chemistry needs to be exact it al ...
Carbon dioxide capture and utilization in petrochemical industry
... It was recently demonstrated that a zeolitic imidazolate framework with high thermal (up to 390 °C) and chemical stability under refluxing organic and aqueous media shows exceptional selectivity for CO2 capture from CO2/CO mixtures with an extraordinary capacity for storing CO2. Adsorption Adsorptio ...
... It was recently demonstrated that a zeolitic imidazolate framework with high thermal (up to 390 °C) and chemical stability under refluxing organic and aqueous media shows exceptional selectivity for CO2 capture from CO2/CO mixtures with an extraordinary capacity for storing CO2. Adsorption Adsorptio ...
... potentiodynamic polarization (PDP). Results show that PT is a good inhibitor and its inhibition efficiency reaches 95 % at 10−3 M. The percentage inhibition efficiency (η) was found to increase with increase of the inhibitor concentration due to the adsorption of the inhibitor molecules on the metal ...
Complexes of The Group 6 Elements
... All reactions and manipulations involving the metal carbonyl complexes were carried out either in a vacuum or under a dry and deoxygenated nitrogen atmosphere by using Schlenk techniques. Hexacarbonylchromium(0), hexacarbonylmolybdenum(0), hexacarbonyltungsten(0), bis(diphenylphosphino)methane, 1,2- ...
... All reactions and manipulations involving the metal carbonyl complexes were carried out either in a vacuum or under a dry and deoxygenated nitrogen atmosphere by using Schlenk techniques. Hexacarbonylchromium(0), hexacarbonylmolybdenum(0), hexacarbonyltungsten(0), bis(diphenylphosphino)methane, 1,2- ...
Sodasorb Manual - Shearwater Research
... Sodasorb absorbent is a pellet mixture of soda lime which removes carbon dioxide (CO2) in anesthesia, metabolator, and other acid gas absorbent system. The discovery of soda lime’s absorptive properties can be traced back more than 215 years. In 1777, a Swedish chemist named Scheele kept bees alive ...
... Sodasorb absorbent is a pellet mixture of soda lime which removes carbon dioxide (CO2) in anesthesia, metabolator, and other acid gas absorbent system. The discovery of soda lime’s absorptive properties can be traced back more than 215 years. In 1777, a Swedish chemist named Scheele kept bees alive ...
Mathematical Model of Prediction of Nitrogen Pickup in Nitriding
... Copyright © 2014 Saeed Ghali. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Low carbon ferromanganese was nitrided through gas-soli ...
... Copyright © 2014 Saeed Ghali. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Low carbon ferromanganese was nitrided through gas-soli ...
1. General introduction 1.1 Organometallic chemistry and homogeneous catalysis
... claimed to be the most appropriate because of its combination of bulkiness and low coordinating ability.40,76 For this anion, multinuclear NMR studies showed the weakest contacts with the cationic part of the catalysts.76 Preformed catalysts containing one40 or two molecules of chelating ligand77 ha ...
... claimed to be the most appropriate because of its combination of bulkiness and low coordinating ability.40,76 For this anion, multinuclear NMR studies showed the weakest contacts with the cationic part of the catalysts.76 Preformed catalysts containing one40 or two molecules of chelating ligand77 ha ...
Mineral Carbonation of CO2
... McGrail et al. (2006) estimated that the Columbia River basalts alone have the capacity to sequester in excess of 100 Gt of CO2. Many lava flows are porous and permeable and have enormous storage capacity. Basalts also dominate the seafloor, providing vast in situ carbon-mineralization sites through ...
... McGrail et al. (2006) estimated that the Columbia River basalts alone have the capacity to sequester in excess of 100 Gt of CO2. Many lava flows are porous and permeable and have enormous storage capacity. Basalts also dominate the seafloor, providing vast in situ carbon-mineralization sites through ...
Allotropes of carbon
Carbon is capable of forming many allotropes due to its valency. Well-known forms of carbon include diamond and graphite. In recent decades many more allotropes and forms of carbon have been discovered and researched including ball shapes such as buckminsterfullerene and sheets such as graphene. Larger scale structures of carbon include nanotubes, nanobuds and nanoribbons. Other unusual forms of carbon exist at very high temperature or extreme pressures.