Give reasons for the following.(one mark each)
... 13. SN2 reaction always proceeds with inversion of configuration. 14. The order of reactivity of alkyl halides for SN2 is 1o> 2o>3o 15. The order of reactivity of alkyl halides for SN1 is 3o> 2o>1o 16. Even trace amounts of water has to be removed from Grignards reagent . 17. Haloarenes/ aryl halide ...
... 13. SN2 reaction always proceeds with inversion of configuration. 14. The order of reactivity of alkyl halides for SN2 is 1o> 2o>3o 15. The order of reactivity of alkyl halides for SN1 is 3o> 2o>1o 16. Even trace amounts of water has to be removed from Grignards reagent . 17. Haloarenes/ aryl halide ...
Asymmetric Catalytic Aldol
... Zirconium Catalysis • Bulky Zr catalysts afford preferentially anti aldols independent of the sily enolate geometry. • Small amounts of protic additives (alcohols) are critical for catalyst ...
... Zirconium Catalysis • Bulky Zr catalysts afford preferentially anti aldols independent of the sily enolate geometry. • Small amounts of protic additives (alcohols) are critical for catalyst ...
TRANSLATION - Grade 12 Biology
... The next tRNA carrying the required a.a. enters the A site. At the catalytic site (b/w A and P) a peptide bond forms between the two amino acids. The ribosome moves over one codon. The second a.acid moves to the P site, a tRNA brings the next a.acid to the A site and it is added to the chain. The fi ...
... The next tRNA carrying the required a.a. enters the A site. At the catalytic site (b/w A and P) a peptide bond forms between the two amino acids. The ribosome moves over one codon. The second a.acid moves to the P site, a tRNA brings the next a.acid to the A site and it is added to the chain. The fi ...
One of the chemicals used to make soaps is sodium hydroxide
... The common salts listed in the table can all be made by reacting an acid with a base. ...
... The common salts listed in the table can all be made by reacting an acid with a base. ...
Anhydrous copper (II) sulfate: an efficient catalyst for the liquid
... Received September 11, 1979 ...
... Received September 11, 1979 ...
amine
... nonbonded electron pair on the nitrogen atom, interconversion cannot occur, and the N atom is just like a carbon atom with four different groups around it. ...
... nonbonded electron pair on the nitrogen atom, interconversion cannot occur, and the N atom is just like a carbon atom with four different groups around it. ...
Insertion of SO2 into the Metal−Carbon Bonds of Rhodium and
... been obtained. Acetonitrile has been observed to be capable of displacing the labile triflate ligand in other organometallic systems.5 Reaction of 5 with an excess of CH3CN in CH2Cl2 leads to an immediate color change of the solution from yellow to colorless. Removal of the excess of acetonitrile un ...
... been obtained. Acetonitrile has been observed to be capable of displacing the labile triflate ligand in other organometallic systems.5 Reaction of 5 with an excess of CH3CN in CH2Cl2 leads to an immediate color change of the solution from yellow to colorless. Removal of the excess of acetonitrile un ...
chm238f02.pracexam2.ans
... Chlorine is o,p directing because of resonance. Note the bonus structure above. 4 resonance structures vs 3 for meta subst. Chlorine is EWG through sigma bonds because of its high electronegativity. Chloro-substituted benzene has less electron density to donate towards the NO2+ group. ...
... Chlorine is o,p directing because of resonance. Note the bonus structure above. 4 resonance structures vs 3 for meta subst. Chlorine is EWG through sigma bonds because of its high electronegativity. Chloro-substituted benzene has less electron density to donate towards the NO2+ group. ...
Advanced Organic Chemistry II Chemistry 412/512 Spring 2012
... Basicity Functions of Common Bases In analogy of the acidity function H0, which is appropriate for dealing with acid catalysis, a function H– was developed to deal with base catalysis ...
... Basicity Functions of Common Bases In analogy of the acidity function H0, which is appropriate for dealing with acid catalysis, a function H– was developed to deal with base catalysis ...
Stoich chem reactions practice Answer Section
... 2. In writing an equation that produces hydrogen gas, the correct representation of hydrogen gas is a. H. c. H2. b. 2H. d. OH. 3. To balance a chemical equation, it may be necessary to adjust the a. coefficients. c. formulas of the products. b. subscripts. d. number of products. 4. Which word equati ...
... 2. In writing an equation that produces hydrogen gas, the correct representation of hydrogen gas is a. H. c. H2. b. 2H. d. OH. 3. To balance a chemical equation, it may be necessary to adjust the a. coefficients. c. formulas of the products. b. subscripts. d. number of products. 4. Which word equati ...
Document
... Basicity: thermodynamic affinity toward H+ Nucleophilicity: affinity toward positively polarized C atom or hetero atom (P, S, etc.) ...
... Basicity: thermodynamic affinity toward H+ Nucleophilicity: affinity toward positively polarized C atom or hetero atom (P, S, etc.) ...
File
... But if secondary or tertiary alkyl halides are taken in place of primary alkyl halides, then elimination would compete over substitution. As a result, alkenes would be produced. This is because alkoxides are nucleophiles as well as strong bases. Hence, they react with alkyl halides, which results in ...
... But if secondary or tertiary alkyl halides are taken in place of primary alkyl halides, then elimination would compete over substitution. As a result, alkenes would be produced. This is because alkoxides are nucleophiles as well as strong bases. Hence, they react with alkyl halides, which results in ...
IUPAC Names for Carboxylic Acids
... • are found in fruits, milk, and sugar cane. • are naturally occurring carboxylic acids with a hydroxyl group on the carbon atom that is adjacent to the carboxyl group. ...
... • are found in fruits, milk, and sugar cane. • are naturally occurring carboxylic acids with a hydroxyl group on the carbon atom that is adjacent to the carboxyl group. ...
Unit 6 web
... Isomers are compounds that have the same molecular formula but are ‘different’ in some aspect of their structure, eg. a. positional: structural chemical b. geometrical: ...
... Isomers are compounds that have the same molecular formula but are ‘different’ in some aspect of their structure, eg. a. positional: structural chemical b. geometrical: ...
Introduction to Organic Synthesis 2011
... use of several common reactions, introduce the concept of synthetic organic chemistry and how organic chemists design and carry out multi step synthesis. The following topics will be covered in this course: •Introduction to synthesis, chemoselectivity, regioselectivity and functional groups •Radical ...
... use of several common reactions, introduce the concept of synthetic organic chemistry and how organic chemists design and carry out multi step synthesis. The following topics will be covered in this course: •Introduction to synthesis, chemoselectivity, regioselectivity and functional groups •Radical ...
SULFONATION OF BY SO3
... The sulfonation process relates to the sulfur trioxide sulfonation of long chain and branched chain aliphatic alcohols such as fatty alcohols, and to the sulfonation of the aromatic nucleus of alkyl aromatic compounds. The reaction of sulfur trioxide is with an alkyl benzene whereby the sulfonated a ...
... The sulfonation process relates to the sulfur trioxide sulfonation of long chain and branched chain aliphatic alcohols such as fatty alcohols, and to the sulfonation of the aromatic nucleus of alkyl aromatic compounds. The reaction of sulfur trioxide is with an alkyl benzene whereby the sulfonated a ...
Answers - Benjamin
... d The key feature of the i.r. spectrum is the change at ca 3000 cm–1 indicating the loss of a phenolic hydroxyl and/or carboxylic acid group. The n.m.r. spectra show the loss of a carboxylic acid –OH group, and the gain of a methyl group. The CH3 group is in an environment different to that in aspir ...
... d The key feature of the i.r. spectrum is the change at ca 3000 cm–1 indicating the loss of a phenolic hydroxyl and/or carboxylic acid group. The n.m.r. spectra show the loss of a carboxylic acid –OH group, and the gain of a methyl group. The CH3 group is in an environment different to that in aspir ...
Παρουσίαση του PowerPoint
... colorings and flavorings, perfumes, detergents and disinfectants. Research chemists synthesize natural products whose structure is uncertain, compounds for mechanistic investigations, possible intermediate in chemical and biological processes, thousands of potential drugs used in medical practice, a ...
... colorings and flavorings, perfumes, detergents and disinfectants. Research chemists synthesize natural products whose structure is uncertain, compounds for mechanistic investigations, possible intermediate in chemical and biological processes, thousands of potential drugs used in medical practice, a ...
Παρουσίαση του PowerPoint
... Before and during these syntheses, groups of chemists sitting around blackboards or piles of paper plan the work they are about to undertake. Possible routes are drawn out, criticized, modified again when the behavior of the compounds in the flask turns out to be different from what was expected, un ...
... Before and during these syntheses, groups of chemists sitting around blackboards or piles of paper plan the work they are about to undertake. Possible routes are drawn out, criticized, modified again when the behavior of the compounds in the flask turns out to be different from what was expected, un ...
Oxidation Reactions
... The oxidation of an alcohol can produce either an aldehyde or a ketone. Ethanol can be oxidized in the laboratory through a heating process combined with the addition of an oxidizing agent such as the dichromate ion, which catalyzes the reaction in an acidic solution. The reaction produces the aldeh ...
... The oxidation of an alcohol can produce either an aldehyde or a ketone. Ethanol can be oxidized in the laboratory through a heating process combined with the addition of an oxidizing agent such as the dichromate ion, which catalyzes the reaction in an acidic solution. The reaction produces the aldeh ...
Aldehydes, Ketones and Carboxylic acids
... Reactions of aldehydes and ketones: Aldehydes and ketones undergo nucleophilic substitution reaction. In nucleophilic substitution, a species that has extra electron or lone pair of electron attacks the carbonyl carbon of the ketone or the aldehyde leading to an alkoxide intermediate as shown in the ...
... Reactions of aldehydes and ketones: Aldehydes and ketones undergo nucleophilic substitution reaction. In nucleophilic substitution, a species that has extra electron or lone pair of electron attacks the carbonyl carbon of the ketone or the aldehyde leading to an alkoxide intermediate as shown in the ...
Petasis reaction
The Petasis reaction (alternatively called the Petasis borono–Mannich (PBM) reaction) is the chemical reaction of an amine, aldehyde, and vinyl- or aryl-boronic acid to form substituted amines.Reported in 1993 by Nicos Petasis as a practical method towards the synthesis of a geometrically pure antifungal agent, naftifine, the Petasis reaction can be described as a variation of the Mannich reaction. Rather than generating an enolate to form the substituted amine product, in the Petasis reaction, the vinyl group of the organoboronic acid serves as the nucleophile. In comparison to other methods of generating allyl amines, the Petasis reaction tolerates a multifunctional scaffold, with a variety of amines and organoboronic acids as potential starting materials. Additionally, the reaction does not require anhydrous or inert conditions. As a mild, selective synthesis, the Petasis reaction is useful in generating α-amino acids, and is utilized in combinatorial chemistry and drug discovery.