ch15
... Optical Activity A chiral compound is optically active; i.e., it rotates the plane of polarized light. A compound that rotates the plane of light clockwise is called dextrorotatory, while a compound that rotates the plane of light counterclockwise is called levorotatory. Optical isomers have identi ...
... Optical Activity A chiral compound is optically active; i.e., it rotates the plane of polarized light. A compound that rotates the plane of light clockwise is called dextrorotatory, while a compound that rotates the plane of light counterclockwise is called levorotatory. Optical isomers have identi ...
Lecture notes Chapters 14-15
... Note: enantiomers have different physical and chemical properties. Example: 2-butanol is a chiral compound and it is not superposable on its mirror. If we hold the mirror image by the C-OH bond and rotate the bottom part of molecule by 180° about this bond, you can see the orientation of H and -CH2C ...
... Note: enantiomers have different physical and chemical properties. Example: 2-butanol is a chiral compound and it is not superposable on its mirror. If we hold the mirror image by the C-OH bond and rotate the bottom part of molecule by 180° about this bond, you can see the orientation of H and -CH2C ...
ORGANIC CHEMISTRY I – REVIEW FOR FINAL EXAM
... Chapter 1: Structure and Bonding -you should know; 1. Atomic Structure- Orbitals, Electron Configurations 2. Valence Bond Theory and Molecular Orbital Theory 3. Hybridization: sp3 Orbitals and the Structure of Methane, sp2 Orbitals and the Structure of Ethylene, sp Orbitals and the Structure of Acet ...
... Chapter 1: Structure and Bonding -you should know; 1. Atomic Structure- Orbitals, Electron Configurations 2. Valence Bond Theory and Molecular Orbital Theory 3. Hybridization: sp3 Orbitals and the Structure of Methane, sp2 Orbitals and the Structure of Ethylene, sp Orbitals and the Structure of Acet ...
towards the synthesis of functionalised macrocyclic receptors
... 84, is described. Both macrocycles were fully characterised using elemental analysis, 1H NMR, 13C NMR, and mass spectroscopy. The solid-state structure of 82 was also determined using X-ray crystallography. During these investigations it was shown that Cs+ can be replaced by K+ as an effective templ ...
... 84, is described. Both macrocycles were fully characterised using elemental analysis, 1H NMR, 13C NMR, and mass spectroscopy. The solid-state structure of 82 was also determined using X-ray crystallography. During these investigations it was shown that Cs+ can be replaced by K+ as an effective templ ...
+ H 2 O(g)
... Info on Decomp Reactions • Energy is usually need to make these reactions happen • Often hard to predict products unless the substance breaks into its ...
... Info on Decomp Reactions • Energy is usually need to make these reactions happen • Often hard to predict products unless the substance breaks into its ...
Level 3 Chemistry (91391) 2013
... (ii) Link the structure of enantiomers to a physical property that can be used to distinguish them from non-optically active molecules. ...
... (ii) Link the structure of enantiomers to a physical property that can be used to distinguish them from non-optically active molecules. ...
Reactions to functionalize benzene
... Due to the stability of aromatic system, addition reactions aren’t favored. Electrophilic aromatic substitution is the predominant reaction mechanism Hydrogens are easily replaced by electrophilic substituent groups H ...
... Due to the stability of aromatic system, addition reactions aren’t favored. Electrophilic aromatic substitution is the predominant reaction mechanism Hydrogens are easily replaced by electrophilic substituent groups H ...
organic chemistry i
... o halogenation of hydrocarbons o addition of hydrogen halide o addition of halogens to alkenes o addition of halogens to alkynes o halide exchange Reactions. Nucleophilic aliphatic substitution Reactions of Alkyl Halides o nucleophilic substitution o dehydrohalogenation o Grignard reagent Nucleophil ...
... o halogenation of hydrocarbons o addition of hydrogen halide o addition of halogens to alkenes o addition of halogens to alkynes o halide exchange Reactions. Nucleophilic aliphatic substitution Reactions of Alkyl Halides o nucleophilic substitution o dehydrohalogenation o Grignard reagent Nucleophil ...
Catalysis Web Pages for Pre-University
... energy, Ea. Once the activation energy barrier has been reached bonds are rearranged and energy can be released. In exothermic reactions all the activation energy is released and more. The excess energy is the heat of reaction. In endothermic reactions not all the activation energy is released: some ...
... energy, Ea. Once the activation energy barrier has been reached bonds are rearranged and energy can be released. In exothermic reactions all the activation energy is released and more. The excess energy is the heat of reaction. In endothermic reactions not all the activation energy is released: some ...
The 9-Phenyl-9-fluorenyl Group for Nitrogen Protection in
... Abstract: One of the biggest challenges in asymmetric synthesis is to prevent racemization of enantiopure starting materials. However, at least some of the enantiopurity is lost in most of the existing reactions used in synthetic organic chemistry. This translates into unnecessary material losses. N ...
... Abstract: One of the biggest challenges in asymmetric synthesis is to prevent racemization of enantiopure starting materials. However, at least some of the enantiopurity is lost in most of the existing reactions used in synthetic organic chemistry. This translates into unnecessary material losses. N ...
Reaction of amino acids with exo-3,6-epoxy-1,2,3,6
... When an aqueous solution of glycine and the anhydride 2 was heated and subsequently evaporated by azeotropic distillation of toluene as described by Ondruš et al., we obtained material which corresponded with that reported by them.6 However, upon attempted crystallization from chloroform, as previou ...
... When an aqueous solution of glycine and the anhydride 2 was heated and subsequently evaporated by azeotropic distillation of toluene as described by Ondruš et al., we obtained material which corresponded with that reported by them.6 However, upon attempted crystallization from chloroform, as previou ...
A Convenient Synthesis of Amino Acid Methyl Esters
... 15]. This method has been used in the transformation of N-Boc-α-amino acids into N-unprotected αamino methyl esters [16] and some other amino acid methyl esters have been prepared using this system [17-20]. In order to demonstrate the general applicability of the method, we have examined a series of ...
... 15]. This method has been used in the transformation of N-Boc-α-amino acids into N-unprotected αamino methyl esters [16] and some other amino acid methyl esters have been prepared using this system [17-20]. In order to demonstrate the general applicability of the method, we have examined a series of ...
File - Kheriaty Chemistry
... a. What element will Li bond to? b. What is the chemical formula of that new product? c. What element will O bond to? d. What is the chemical formula of that new product? 16. Potassium oxide reacts with magnesium bromide. a. What element will potassium bond to? b. What is the chemical formula of tha ...
... a. What element will Li bond to? b. What is the chemical formula of that new product? c. What element will O bond to? d. What is the chemical formula of that new product? 16. Potassium oxide reacts with magnesium bromide. a. What element will potassium bond to? b. What is the chemical formula of tha ...
The Aldol Condensation Preparation of 4
... The activation of the alpha hydrogen by a carbonyl group had been encountered empirically before van't Hoff's speculation. Use of the aldol condensation resulted from Wurtz's studies of aldehydes … The aldol condensation proved to be a general reaction of aldehydes with some ketones, provided hydrog ...
... The activation of the alpha hydrogen by a carbonyl group had been encountered empirically before van't Hoff's speculation. Use of the aldol condensation resulted from Wurtz's studies of aldehydes … The aldol condensation proved to be a general reaction of aldehydes with some ketones, provided hydrog ...
Chemical Reactions PPT
... Since oxidation is the loss of electrons and reduction is the gain of electrons, they must occur simultaneously. ** Any chemical process in which elements undergo changes in oxidation number is an oxidation – reduction reaction , or redox reaction for short.** ...
... Since oxidation is the loss of electrons and reduction is the gain of electrons, they must occur simultaneously. ** Any chemical process in which elements undergo changes in oxidation number is an oxidation – reduction reaction , or redox reaction for short.** ...
Grant MacEwan College - Faculty Web Pages
... Course Description:(3 credits) This course studies the molecular structure and reactivity of organic compounds based on their functional groups and is intended for students who have obtained at least three credits in Introductory University Chemistry. The course provides an introduction to nomenclat ...
... Course Description:(3 credits) This course studies the molecular structure and reactivity of organic compounds based on their functional groups and is intended for students who have obtained at least three credits in Introductory University Chemistry. The course provides an introduction to nomenclat ...
CHM 260 – Fundamentals of Organic Chemistry
... Alkane nomenclature. Conformational analysis of simple alkanes and cyclohexane. Section 1 – At the end of this section, the student should be able to: 1. Understand why there are so many organic compounds. 2. List some common elements, besides carbon, found in many organic compounds. 3. Describe the ...
... Alkane nomenclature. Conformational analysis of simple alkanes and cyclohexane. Section 1 – At the end of this section, the student should be able to: 1. Understand why there are so many organic compounds. 2. List some common elements, besides carbon, found in many organic compounds. 3. Describe the ...
Stockholm University
... 7), are tolerated under the applied reaction conditions. The reactions involving substituted allylacetates provide the branched products with very high regioselectivity. The diastereoselectivity of the reaction is also very high. In many cases a single diastereomer was obtained (Entries 2, 6, 7 and ...
... 7), are tolerated under the applied reaction conditions. The reactions involving substituted allylacetates provide the branched products with very high regioselectivity. The diastereoselectivity of the reaction is also very high. In many cases a single diastereomer was obtained (Entries 2, 6, 7 and ...
Stereoselective Reduction of Ketones with Sodium Borohydride
... – Group of very important synthetic reagents ...
... – Group of very important synthetic reagents ...
chapter 8 lecture
... • Two different starting materials can be used—a vicinal dihalide or a geminal dihalide. ...
... • Two different starting materials can be used—a vicinal dihalide or a geminal dihalide. ...
Lecture 9a - University of California, Los Angeles
... reactive than ketones which means that both groups would react with the Grignard reagent, albeit with different rates The higher reactivity of the aldehyde is exploited in the formation of the cyclic acetal using 1,3-propanediol ...
... reactive than ketones which means that both groups would react with the Grignard reagent, albeit with different rates The higher reactivity of the aldehyde is exploited in the formation of the cyclic acetal using 1,3-propanediol ...
Enantioselective synthesis
Enantioselective synthesis, also called chiral synthesis or asymmetric synthesis, is defined by IUPAC as: a chemical reaction (or reaction sequence) in which one or more new elements of chirality are formed in a substrate molecule and which produces the stereoisomeric (enantiomeric or diastereoisomeric) products in unequal amounts.Put more simply: it is the synthesis of a compound by a method that favors the formation of a specific enantiomer or diastereomer.Enantioselective synthesis is a key process in modern chemistry and is particularly important in the field of pharmaceuticals, as the different enantiomers or diastereomers of a molecule often have different biological activity.