Abdullah F. Eid
... sharing octahedra and having a common oxygen atom which is also shared with the central tetrahedron XO4 . Among a wide variety of HPAs, the Keggin’s are the most stable and more easily available; these are the most important for catalysis. In this thesis HPAs are understood as the Keggin acids, unle ...
... sharing octahedra and having a common oxygen atom which is also shared with the central tetrahedron XO4 . Among a wide variety of HPAs, the Keggin’s are the most stable and more easily available; these are the most important for catalysis. In this thesis HPAs are understood as the Keggin acids, unle ...
Development of Catalytic Ester Condensations and Hydrolysis of
... the use of column chromatography to separate the catalysts from the reaction mixture and to purify the esters. Chapter 2 discusses the development of the ester condensation processes for greater practicality and higher reactivity than with the use of N,N-diarylammonium salt catalysts since less reac ...
... the use of column chromatography to separate the catalysts from the reaction mixture and to purify the esters. Chapter 2 discusses the development of the ester condensation processes for greater practicality and higher reactivity than with the use of N,N-diarylammonium salt catalysts since less reac ...
Alcohols and Phenols
... • NaBH4 is not sensitive to moisture and it does not reduce other common functional groups • Lithium aluminum hydride (LiAlH4) is more powerful, less specific, and very reactive with water • Both add the equivalent of “H-” ...
... • NaBH4 is not sensitive to moisture and it does not reduce other common functional groups • Lithium aluminum hydride (LiAlH4) is more powerful, less specific, and very reactive with water • Both add the equivalent of “H-” ...
RES15_c2_wp
... Research the discovery of phenol (carbolic acid) by Lister (see Activity S1 below). Activity M3 below could be done as a spreadsheet. ...
... Research the discovery of phenol (carbolic acid) by Lister (see Activity S1 below). Activity M3 below could be done as a spreadsheet. ...
The Reaction Mechanism of Silicon
... research efforts since its initial discovery.1 This type of reaction, which cleaves, or activates, a Si-H bond, is critical in hydrosilation.2,3 In addition, it provides a direct comparison to another important bond-cleavage reaction, C-H bond activation by similar transition metal complexes.4 As su ...
... research efforts since its initial discovery.1 This type of reaction, which cleaves, or activates, a Si-H bond, is critical in hydrosilation.2,3 In addition, it provides a direct comparison to another important bond-cleavage reaction, C-H bond activation by similar transition metal complexes.4 As su ...
Final Exam Review Sheet Chemistry 110a/1998
... 5. Be able to explain the allylic bromination of organic molecules with N-bromosuccinimide (NBS), using an arrow-pushing mechanism to explain how the reaction works and avoids the reaction of Br2 and the alkene. 6. Be able to rationalize the added stability of conjugated double bonds, using a resona ...
... 5. Be able to explain the allylic bromination of organic molecules with N-bromosuccinimide (NBS), using an arrow-pushing mechanism to explain how the reaction works and avoids the reaction of Br2 and the alkene. 6. Be able to rationalize the added stability of conjugated double bonds, using a resona ...
Lithium in Organic Chemistry
... • Lithium will become more and more important because of its application in energy. • Organic legand will play an important role in lithium production. • Organolithium reagent is a potential nucleophilic reagent for cross coupling reactions. ...
... • Lithium will become more and more important because of its application in energy. • Organic legand will play an important role in lithium production. • Organolithium reagent is a potential nucleophilic reagent for cross coupling reactions. ...
Test bank questions
... Which of the following is a true statement about chemical equilibria in general? A. At equilibrium the total concentration of products equals the total concentration of reactants, that is, [products] = [reactants]. B. Equilibrium is the result of the cessation of all chemical change. C. There is onl ...
... Which of the following is a true statement about chemical equilibria in general? A. At equilibrium the total concentration of products equals the total concentration of reactants, that is, [products] = [reactants]. B. Equilibrium is the result of the cessation of all chemical change. C. There is onl ...
The Process of Chemical Reactions
... and with an orientation that allows the new bond or bonds to form as the old bond or bonds break. Any factor that affects these conditions will also affect the rate of the reaction. Let’s look again at the chemical reaction between oxygen atoms and ozone molecules. ...
... and with an orientation that allows the new bond or bonds to form as the old bond or bonds break. Any factor that affects these conditions will also affect the rate of the reaction. Let’s look again at the chemical reaction between oxygen atoms and ozone molecules. ...
arene Ligands - American Chemical Society
... In hydrocarbon solvents the compounds M2(NMe2)6 (M ) Mo, W) react with p-tert-butylcalix[4]arene, H4L, to give the complexes (H2NMe2)2[M2(µ,η2,η2-L)2], 1 (M ) Mo, W). In the molecular structure of 1‚4THF, the calix[4]arene ligands span the MotMo bond of distance 2.193(1) Å in a µ,η2,η2 manner such t ...
... In hydrocarbon solvents the compounds M2(NMe2)6 (M ) Mo, W) react with p-tert-butylcalix[4]arene, H4L, to give the complexes (H2NMe2)2[M2(µ,η2,η2-L)2], 1 (M ) Mo, W). In the molecular structure of 1‚4THF, the calix[4]arene ligands span the MotMo bond of distance 2.193(1) Å in a µ,η2,η2 manner such t ...
Lecture 1: Key Concepts in Stereoselective Synthesis
... -Da reported a similar indirect way of doing catalytic enantioselective Grignard addition. -Catalytic asymmetric addition was achieved by deactivating Grignard reagents through chelation with bis[2(N,N-dimethylamino)ethyl]ether (BDMAEE). -In this carbonyl addition reaction, MgBr2 and MgBr(OiPr) are ...
... -Da reported a similar indirect way of doing catalytic enantioselective Grignard addition. -Catalytic asymmetric addition was achieved by deactivating Grignard reagents through chelation with bis[2(N,N-dimethylamino)ethyl]ether (BDMAEE). -In this carbonyl addition reaction, MgBr2 and MgBr(OiPr) are ...
Alkenes - Gadjah Mada University
... CH3CH=CHCH3 + H2 CH3CH2CH2CH3 Hydrogenation requires high temperatures and pressures as well as the presence of a catalyst (e.g. ...
... CH3CH=CHCH3 + H2 CH3CH2CH2CH3 Hydrogenation requires high temperatures and pressures as well as the presence of a catalyst (e.g. ...
Chapter 9 Coordination Chemistry I: Structure and Isomers
... blue, Aureolin, and copper vitriol. The key breakthrough occurred when Alfred Werner proposed, inter alia, that Co(III) bears six ligands in an octahedral geometry. The theory allows one to understand the difference between coordinated and ionic chloride in the cobalt ammine chlorides and to explain ...
... blue, Aureolin, and copper vitriol. The key breakthrough occurred when Alfred Werner proposed, inter alia, that Co(III) bears six ligands in an octahedral geometry. The theory allows one to understand the difference between coordinated and ionic chloride in the cobalt ammine chlorides and to explain ...
Scheme A Topic Checklist Atomic Structure 1.1
... The harmful effects that pollutants (e.g. NOx, CO and unburned hydrocarbons) could have on the environment and how chemistry is used to reduce their release Discuss critically the issues which surround the role of H2O, CH4 and CO2 as ...
... The harmful effects that pollutants (e.g. NOx, CO and unburned hydrocarbons) could have on the environment and how chemistry is used to reduce their release Discuss critically the issues which surround the role of H2O, CH4 and CO2 as ...
Revised (12 Sept 2009) Topic: Chemical Equilibrium
... and NCS−(aq) ions (making the denominator bigger). Thus, although both forward and reverse reactions occur simultaneously, the reverse reaction will predominate to decrease the Fe(NCS)2+(aq) concentration until equilibrium is established. When the reverse reaction occurs to a greater extent than the ...
... and NCS−(aq) ions (making the denominator bigger). Thus, although both forward and reverse reactions occur simultaneously, the reverse reaction will predominate to decrease the Fe(NCS)2+(aq) concentration until equilibrium is established. When the reverse reaction occurs to a greater extent than the ...
Ring-closing metathesis
Ring-closing metathesis, or RCM, is a widely used variation of olefin metathesis in organic chemistry for the synthesis of various unsaturated rings via the intramolecular metathesis of two terminal alkenes, which forms the cycloalkene as the E- or Z- isomers and volatile ethylene.The most commonly synthesized ring sizes are between 5-7 atoms; however, reported syntheses include 45- up to 90- membered macroheterocycles. These reactions are metal-catalyzed and proceed through a metallacyclobutane intermediate. It was first published by Dider Villemin in 1980 describing the synthesis of an Exaltolide precursor, and later become popularized by Robert H. Grubbs and Richard R. Schrock, who shared the Nobel Prize in Chemistry, along with Yves Chauvin, in 2005 for their combined work in olefin metathesis. RCM is a favorite among organic chemists due to its synthetic utility in the formation of rings, which were previously difficult to access efficiently, and broad substrate scope. Since the only major by-product is ethylene, these reactions may also be considered atom economic, an increasingly important concern in the development of green chemistry.There are several reviews published on ring-closing metathesis.