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CHM238-01 EXAM 2 October 14, 2002 103
... 5. (12 pts) Preparation of alcohols by Grignard reagents reacted with C=O compounds is very important. (a) If the Grignard reagent were phenyl Grignard, PhMgBr, what C=O compound would be the best one to use in order to make the following alcohols. If it doesn’t work, write NR. (b) If the Grignard ...
... 5. (12 pts) Preparation of alcohols by Grignard reagents reacted with C=O compounds is very important. (a) If the Grignard reagent were phenyl Grignard, PhMgBr, what C=O compound would be the best one to use in order to make the following alcohols. If it doesn’t work, write NR. (b) If the Grignard ...
Development of Multi-Component Reactions using Catalytically Generated Allyl Metal Reagents
... transformations. Since the catalytically generated intermediates (such as organometallic compounds) need not to be isolated, but react with other components present in the reaction mixture, cumbersome purification of highly reactive species can be avoided. This thesis is focused on development of se ...
... transformations. Since the catalytically generated intermediates (such as organometallic compounds) need not to be isolated, but react with other components present in the reaction mixture, cumbersome purification of highly reactive species can be avoided. This thesis is focused on development of se ...
chm238f02.exam2
... Which reagents would you use to make the starting alcohol in a above from 3-Methyl-1-butene, without rearrangement? ...
... Which reagents would you use to make the starting alcohol in a above from 3-Methyl-1-butene, without rearrangement? ...
Ch. 9 Review
... MASS-MASS PROBLEM) THE MEASURED AMOUNT OF A PRODUCT OBTAINED FROM A REACTION RATIO OF ACTUAL YIELD TO THE THEORETICAL YIELD, MULTIPLIED BY ...
... MASS-MASS PROBLEM) THE MEASURED AMOUNT OF A PRODUCT OBTAINED FROM A REACTION RATIO OF ACTUAL YIELD TO THE THEORETICAL YIELD, MULTIPLIED BY ...
Aldehydes can react with alcohols to form hemiacetals
... Cyclic acetals like this are more resistant to hydrolysis than acyclic ones and easier to make—they form quite readily even from ketones. Again, we have entropic factors to thank for their stability. For the formation of a cyclic acetal, two molecules go in (ketone plus diol) and two molecules come ...
... Cyclic acetals like this are more resistant to hydrolysis than acyclic ones and easier to make—they form quite readily even from ketones. Again, we have entropic factors to thank for their stability. For the formation of a cyclic acetal, two molecules go in (ketone plus diol) and two molecules come ...
Nucleophilic Substitution and b
... Task: convert to a staggered structure wherein H and Br are anti and predict product. We will convert to a Newman and see what we get… Ph ...
... Task: convert to a staggered structure wherein H and Br are anti and predict product. We will convert to a Newman and see what we get… Ph ...
One-Pot Catalytic Conversion of Cellulose and of Woody
... remaining solid weighed 100 ( 5 mg. GCFID results of these samples are further reported in the Supporting Information. SI Table S-1 also summarizes control reactions where a pine sawdust sample (100 mg) was subjected to analogous conditions for 0.5, 2, and 24 h without catalyst. The behavior was ma ...
... remaining solid weighed 100 ( 5 mg. GCFID results of these samples are further reported in the Supporting Information. SI Table S-1 also summarizes control reactions where a pine sawdust sample (100 mg) was subjected to analogous conditions for 0.5, 2, and 24 h without catalyst. The behavior was ma ...
Manganese-Catalyzed Epoxidations of Alkenes in
... Prominent among simple, soluble metal oxide epoxidation catalysts are systems derived from tungstic acid (H2WO4), phosphate, and ammonium or phosphonium counterions to act as phase transfer agents.52-61 Typically, these are formed in situ, but catalytically active complexes such as (R4N)3{PO4(W(O)(O ...
... Prominent among simple, soluble metal oxide epoxidation catalysts are systems derived from tungstic acid (H2WO4), phosphate, and ammonium or phosphonium counterions to act as phase transfer agents.52-61 Typically, these are formed in situ, but catalytically active complexes such as (R4N)3{PO4(W(O)(O ...
Lectures 4-6
... Collins Oxidation (CrO3 • 2pyridine) TL 1969, 336 - CrO3 (anhydrous) + pyridine (anhydrous) ...
... Collins Oxidation (CrO3 • 2pyridine) TL 1969, 336 - CrO3 (anhydrous) + pyridine (anhydrous) ...
Class Notes Test 1
... Super Strong Bases and Nucleophiles • The counterion metal is a spectator • Stability-reactivity principle: very unstable à very reactive • This great reactivity is very useful (as nucleophile) • This great reactivity (as base) has implication for proper technical use (see following) 7. Solvent and ...
... Super Strong Bases and Nucleophiles • The counterion metal is a spectator • Stability-reactivity principle: very unstable à very reactive • This great reactivity is very useful (as nucleophile) • This great reactivity (as base) has implication for proper technical use (see following) 7. Solvent and ...
Supported Homogeneous Catalysts
... the polymer support is the most important feature of the work with titanocene (23). A necessary feature of a homogeneous catalyst is the existence of a free coordination site on the metal atom to which alkene molecules can attach themselves. Often attempts to produce a free site results in polymeris ...
... the polymer support is the most important feature of the work with titanocene (23). A necessary feature of a homogeneous catalyst is the existence of a free coordination site on the metal atom to which alkene molecules can attach themselves. Often attempts to produce a free site results in polymeris ...
Visible light photooxidation of nitrate: the dawn of
... All reactions were carried out by two sequential additions of 5 mol% of 1 in order to counteract the loss of catalytic activity caused by degradation of the catalyst. The reactions proceed with good selectivity (see Table 2, entries 1, 2, 4), but the conversion was incomplete and unreacted starting ...
... All reactions were carried out by two sequential additions of 5 mol% of 1 in order to counteract the loss of catalytic activity caused by degradation of the catalyst. The reactions proceed with good selectivity (see Table 2, entries 1, 2, 4), but the conversion was incomplete and unreacted starting ...
lecture 2 - alcohols-ethers
... organic chemistry. "SN" stands for nucleophilic substitution and the "1" represents the fact that the rate-determining step is unimolecular. ...
... organic chemistry. "SN" stands for nucleophilic substitution and the "1" represents the fact that the rate-determining step is unimolecular. ...
Oxidation of Diols and Ethers by NaBr03
... confirm the optimum reaction conditions, dioctyl ether (33) was chosen as a model substrate and allowed to react with NaBr03/NaHS03 under various reaction conditions (Eq. 2 and Table 3). The oxidation of 33 with 2 molar amounts of NaBr03/NaHS03 reagent in CH3CN/H20 produced octyl octanoate (34) and ...
... confirm the optimum reaction conditions, dioctyl ether (33) was chosen as a model substrate and allowed to react with NaBr03/NaHS03 under various reaction conditions (Eq. 2 and Table 3). The oxidation of 33 with 2 molar amounts of NaBr03/NaHS03 reagent in CH3CN/H20 produced octyl octanoate (34) and ...
Correlation between Hydrophobicity of Short
... to 3.00 (octanol). From these data, we have derived two QSAR equations describing the role of hydrophobicity in the release of LDH from rat liver epithelial cells following a 1-hr alcohol exposure. The QSAR equation for LDH50 values, log (1/LDH50) = 0.896 log P + 0.117 (n = 11, SD = 0.131), was near ...
... to 3.00 (octanol). From these data, we have derived two QSAR equations describing the role of hydrophobicity in the release of LDH from rat liver epithelial cells following a 1-hr alcohol exposure. The QSAR equation for LDH50 values, log (1/LDH50) = 0.896 log P + 0.117 (n = 11, SD = 0.131), was near ...
Oxygen containing organic compound
... • do not have a polar group. • have an O atom, but there is no H attached. • cannot form hydrogen bonds between ether molecules. ...
... • do not have a polar group. • have an O atom, but there is no H attached. • cannot form hydrogen bonds between ether molecules. ...
Organic Chemistry Fifth Edition
... Ethers are less dense than water and form the top layer when mixed with water. • Note: Diethyl ether (“ether”) is a good general purpose solvent for extracting non-polar and polar organic compounds from H2O. • Its low boiling pt (35 oC) is ideal for recovering organic solute by evaporation of ether. ...
... Ethers are less dense than water and form the top layer when mixed with water. • Note: Diethyl ether (“ether”) is a good general purpose solvent for extracting non-polar and polar organic compounds from H2O. • Its low boiling pt (35 oC) is ideal for recovering organic solute by evaporation of ether. ...
Imbalanced tunneling ready states in alcohol dehydrogenase
... reported b-21 EIE (1.28)28 for the conversion from 2-propanol to acetone and that from acetone to protonated acetone (1.19).29 The calculated EIE of 1.52 (= 1.28 1.19) for the conversion from CH–OH to C+–OH is consistent with an sp3 - sp2 process. The a-D 21 EIE at the 4-H/D position of the centra ...
... reported b-21 EIE (1.28)28 for the conversion from 2-propanol to acetone and that from acetone to protonated acetone (1.19).29 The calculated EIE of 1.52 (= 1.28 1.19) for the conversion from CH–OH to C+–OH is consistent with an sp3 - sp2 process. The a-D 21 EIE at the 4-H/D position of the centra ...
Ch 15 - Phillips Scientific Methods
... • Chymotrypsin has 251 stereocenters. • The maximum number of stereoisomers possible is ...
... • Chymotrypsin has 251 stereocenters. • The maximum number of stereoisomers possible is ...
Oxidation - Sciencemadness
... • The acidic conditions keep the chromium in the Cr2O72state. • Potassium dichromate is not as powerful an oxidizing agent as is potassium permanganate • Sodium dichromate can be substituted for potassium dichromate -- it makes no difference. • There is a color change during the reaction. The orang ...
... • The acidic conditions keep the chromium in the Cr2O72state. • Potassium dichromate is not as powerful an oxidizing agent as is potassium permanganate • Sodium dichromate can be substituted for potassium dichromate -- it makes no difference. • There is a color change during the reaction. The orang ...
Metal-catalysed approaches to amide bond formation
... excellent and in depth review of which was pub lished by Kukushkin and Pombeiro in 2005.23 More recently, catalysts which allow the hydration of organonitriles under ambient conditions24 or in reaction times as short as 2 hours using microwave radiation25 have been published (Scheme 10). 5.2 Couplin ...
... excellent and in depth review of which was pub lished by Kukushkin and Pombeiro in 2005.23 More recently, catalysts which allow the hydration of organonitriles under ambient conditions24 or in reaction times as short as 2 hours using microwave radiation25 have been published (Scheme 10). 5.2 Couplin ...
PowerPoint 簡報
... Compounds containing aromatic rings are often used in dyes, such as these for sale in a market in Nepal ...
... Compounds containing aromatic rings are often used in dyes, such as these for sale in a market in Nepal ...
Kinetic resolution
![](https://commons.wikimedia.org/wiki/Special:FilePath/General_scheme_for_kinetic_resolution.png?width=300)
In organic chemistry, kinetic resolution is a means of differentiating two enantiomers in a racemic mixture. In kinetic resolution, two enantiomers react with different reaction rates in a chemical reaction with a chiral catalyst or reagent, resulting in an enantioenriched sample of the less reactive enantiomer. As opposed to chiral resolution, kinetic resolution does not rely on different physical properties of diastereomeric products, but rather on the different chemical properties of the racemic starting materials. This enantiomeric excess (ee) of the unreacted starting material continually rises as more product is formed, reaching 100% just before full completion of the reaction. Kinetic resolution relies upon differences in reactivity between enantiomers or enantiomeric complexes. Kinetic resolution is a concept in organic chemistry and can be used for the preparation of chiral molecules in organic synthesis. Kinetic resolution reactions utilizing purely synthetic reagents and catalysts are much less common than the use of enzymatic kinetic resolution in application towards organic synthesis, although a number of useful synthetic techniques have been developed in the past 30 years.