'Crown ethers' presentation slideshows

Chapter 16 Ethers, Epoxides, and Sulfides

Chapter 16 Ethers, Epoxides, and Sulfides. 16.1 Nomenclature of Ethers, Epoxides, and Sulfides. Substitutive IUPAC Names of Ethers. name as alkoxy derivatives of alkanes. CH 3 O CH 2 CH 3. CH 3 CH 2 O CH 2 CH 2 CH 2 Cl. methoxy ethane. 1-chloro-3- ethoxy propane. CH 3 CH 2 O CH 2 CH 3.

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Nucleophilic Substitution Reactions (Substitution at sp 3 -hybridized Carbon)

Nucleophilic Substitution Reactions (Substitution at sp 3 -hybridized Carbon). Halides are electronegative elements. Thus, in the case of an alkyl halide, R-X the halide atom can leave from carbon, taking the shared pair of electrons with it.

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Ethers, Sulfides and Epoxides

Structure, nomenclature, properties Ether synthesis - Williamson synthesis ( S N 2 ) H + /ROH addition to olefins ( chapt 6) Reactions - acid catalyzed cleavage of ethers ( S N 2/S N 1/E1 ) [oxidation out ] Ethers as Protecting Groups (Gps) . Epoxides - oxirane nomenclature

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Chapter 18: Ethers and Epoxides; Thiols and Sulfides

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Nomenclature of Ethers, Aldehydes, Ketones, Carboxylic Acids, and Esters

A large portion of the materials on plagiarism on the University of Wisconsin Oshkosh's Writing Center Web site was revealed in February to have been taken verbatim from Purdue University's Web page on plagiarism. . Nomenclature of Ethers, Aldehydes, Ketones, Carboxylic Acids, and Esters.

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Crown Ethers

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Rotaxane

Rotaxane. 2010/06/02 Tobe Lab. Furutani Hajime. Contents. What is Rotaxane ? History -First Synthesis -Host-Guest Chemistry -Improved Synthetic Method Applications of Rotaxane - Rotaxane Specific Mobility -Molecular Switch -Molecular Machine My Project - Chirality

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Chapter 9 Ethers, Thiols, and Sulfides

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Probing Mechanisms of Peptide Bond Formation & Catalysis Using Models

Probing Mechanisms of Peptide Bond Formation & Catalysis Using Models. Model of Koga Uses molecular recognition by a crown ether to bind a model of the substrate Crown ethers:. Koga chemically modified the crown ether to contain 2 thiol (SH) groups to mimic reactions on NRPS.

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Probing Mechanisms of Peptide Bond Formation & Catalysis Using Models

Probing Mechanisms of Peptide Bond Formation & Catalysis Using Models. Model of Koga Uses molecular recognition by a crown ether to bind a model of the substrate Crown ethers:. Koga chemically modified the crown ether to contain 2 thiol (SH) groups to mimic reactions on NRPS.

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Some Aspects of the Synthesis of Crown Ethers

As a result of this study, we have developed a new method for the synthesis of dibenzo-, benzoaza-, spiroaza-, benzthio- and other crownethers. High selective yields of crown-ethers have been obtained due to change in ratio of reacting components and use of different catalysts (ammonium, boron trifluoride etherate), as well as reaction conditions. Interphase debromation of dibroalkanes with crown-ethers has been studied.

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Cryptand

Cryptand.

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