Nitration of Substituted Aromatic Rings and Rate Analysis
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Vapor Phase Nitration of Butane in a Fused Salt Reactor Frank Slates Adams Iowa State University
Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1961 Vapor phase nitration of butane in a fused salt reactor Frank Slates Adams Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Chemical Engineering Commons Recommended Citation Adams, Frank Slates, "Vapor phase nitration of butane in a fused salt reactor " (1961). Retrospective Theses and Dissertations. 2472. https://lib.dr.iastate.edu/rtd/2472 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. This dissertation has been 61-6173 microfilmed exactly as received ADAMS, Jr., Frank Slates, 1931— VAPOR PHASE NITRATION OF BUTANE IN A FUSED SALT REACTOR. Iowa State University of Science and Technology Ph.D., 1961 Engineering, chemical University Microfilms, Inc., Ann Arbor, Michigan VAPOR PHASK NITRATION OF BUTANE IN A FUSED SALT REACTOR by Frank Slates Adams, Jr. A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHIDSOPHÏ Major Subject: Chemical Engineering Approved: Signature was redacted for privacy. In Charge of Major Work Signature was redacted for privacy. Head of Major Department Signature was -
Preparation and Purification of Atmospherically Relevant Α
Atmos. Chem. Phys., 20, 4241–4254, 2020 https://doi.org/10.5194/acp-20-4241-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Technical note: Preparation and purification of atmospherically relevant α-hydroxynitrate esters of monoterpenes Elena Ali McKnight, Nicole P. Kretekos, Demi Owusu, and Rebecca Lyn LaLonde Chemistry Department, Reed College, Portland, OR 97202, USA Correspondence: Rebecca Lyn LaLonde ([email protected]) Received: 31 July 2019 – Discussion started: 6 August 2019 Revised: 8 December 2019 – Accepted: 20 January 2020 – Published: 9 April 2020 Abstract. Organic nitrate esters are key products of terpene oxidation in the atmosphere. We report here the preparation and purification of nine nitrate esters derived from (C)-3- carene, limonene, α-pinene, β-pinene and perillic alcohol. The availability of these compounds will enable detailed investigations into the structure–reactivity relationships of aerosol formation and processing and will allow individual investigations into aqueous-phase reactions of organic nitrate esters. Figure 1. Two hydroxynitrate esters with available spectral data. Relative stereochemistry is undefined. 1 Introduction derived ON is difficult, particularly due to partitioning into the aerosol phase in which hydrolysis and other reactivity Biogenic volatile organic compound (BVOC) emissions ac- can occur (Bleier and Elrod, 2013; Rindelaub et al., 2014, count for ∼ 88 % of non-methane VOC emissions. Of the to- 2015; Romonosky et al., 2015; Thomas et al., 2016). Hydrol- tal BVOC estimated by the Model of Emission of Gases and ysis reactions of nitrate esters of isoprene have been stud- Aerosols from Nature version 2.1 (MEGAN2.1), isoprene is ied directly (Jacobs et al., 2014) and the hydrolysis of ON estimated to comprise half, and methanol, ethanol, acetalde- has been studied in bulk (Baker and Easty, 1950). -
Nitroso and Nitro Compounds 11/22/2014 Part 1
Hai Dao Baran Group Meeting Nitroso and Nitro Compounds 11/22/2014 Part 1. Introduction Nitro Compounds O D(Kcal/mol) d (Å) NO NO+ Ph NO Ph N cellular signaling 2 N O N O OH CH3−NO 40 1.48 molecule in mammals a nitro compound a nitronic acid nitric oxide b.p = 100 oC (8 mm) o CH3−NO2 57 1.47 nitrosonium m.p = 84 C ion (pKa = 2−6) CH3−NH2 79 1.47 IR: υ(N=O): 1621-1539 cm-1 CH3−I 56 Nitro group is an EWG (both −I and −M) Reaction Modes Nitro group is a "sink" of electron Nitroso vs. olefin: e Diels-Alder reaction: as dienophiles Nu O NO − NO Ene reaction 3 2 2 NO + N R h 2 O e Cope rearrangement υ O O Nu R2 N N N R1 N Nitroso vs. carbonyl R1 O O O O O N O O hυ Nucleophilic addition [O] N R2 R O O R3 Other reaction modes nitrite Radical addition high temp low temp nitrolium EWG [H] ion brown color less ion Redox reaction Photochemical reaction Nitroso Compounds (C-Nitroso Compounds) R2 R1 O R3 R1 Synthesis of C-Nitroso Compounds 2 O R1 R 2 N R3 3 R 3 N R N R N 3 + R2 2 R N O With NO sources: NaNO2/HCl, NOBF4, NOCl, NOSbF6, RONO... 1 R O R R1 O Substitution trans-dimer monomer: blue color cis-dimer colorless colorless R R NOBF OH 4 - R = OH, OMe, Me, NR2, NHR N R2 R3 = H or NaNO /HCl - para-selectivity ΔG = 10 Kcal mol-1 Me 2 Me R1 NO oxime R rate determining step Blue color: n π∗ absorption band 630-790 nm IR: υ(N=O): 1621-1539 cm-1, dimer υ(N−O): 1300 (cis), 1200 (trans) cm-1 + 1 Me H NMR (α-C-H) δ = 4 ppm: nitroso is an EWG ON H 3 Kochi et al. -
University of Southampton Research Repository Eprints Soton
University of Southampton Research Repository ePrints Soton Copyright © and Moral Rights for this thesis are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder/s. The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given e.g. AUTHOR (year of submission) "Full thesis title", University of Southampton, name of the University School or Department, PhD Thesis, pagination http://eprints.soton.ac.uk UNIVERSITY OF SOUTHAMPTON FACULTY OF SCIENCE DEPARTMENT OF CHEMISTRY Doctor of Philosophy CHEMICAL AND ELECTROCHEMICAL NITRATIONS OF ALKENES AND DIENES by Andrew Jonathan Bloom ACKNOWLEDGEMENT I wish to thank the following: My parents for their support; Dr. John Mellor and Professor Martin Fleischmann, my supervisors; Dr. Philip Parsons for his faith and encouragement; Neil Smith, Ivan Pinto, Jeff Buchannan and Neil Carlson for the proof-reading and Suzanne Salt for the typing. Financial support from The Procurement Executive, Ministry of Defence, for my maintenance grant, and NATO, for travel expenses, is gratefully acknowledged. Table of Contents Chapter 1 Introduction 1 I'l Electrochemical -
Reactions of Benzene & Its Derivatives
Organic Lecture Series ReactionsReactions ofof BenzeneBenzene && ItsIts DerivativesDerivatives Chapter 22 1 Organic Lecture Series Reactions of Benzene The most characteristic reaction of aromatic compounds is substitution at a ring carbon: Halogenation: FeCl3 H + Cl2 Cl + HCl Chlorobenzene Nitration: H2 SO4 HNO+ HNO3 2 + H2 O Nitrobenzene 2 Organic Lecture Series Reactions of Benzene Sulfonation: H 2 SO4 HSO+ SO3 3 H Benzenesulfonic acid Alkylation: AlX3 H + RX R + HX An alkylbenzene Acylation: O O AlX H + RCX 3 CR + HX An acylbenzene 3 Organic Lecture Series Carbon-Carbon Bond Formations: R RCl AlCl3 Arenes Alkylbenzenes 4 Organic Lecture Series Electrophilic Aromatic Substitution • Electrophilic aromatic substitution: a reaction in which a hydrogen atom of an aromatic ring is replaced by an electrophile H E + + + E + H • In this section: – several common types of electrophiles – how each is generated – the mechanism by which each replaces hydrogen 5 Organic Lecture Series EAS: General Mechanism • A general mechanism slow, rate + determining H Step 1: H + E+ E El e ctro - Resonance-stabilized phile cation intermediate + H fast Step 2: E + H+ E • Key question: What is the electrophile and how is it generated? 6 Organic Lecture Series + + 7 Organic Lecture Series Chlorination Step 1: formation of a chloronium ion Cl Cl + + - - Cl Cl+ Fe Cl Cl Cl Fe Cl Cl Fe Cl4 Cl Cl Chlorine Ferric chloride A molecular complex An ion pair (a Lewis (a Lewis with a positive charge containing a base) acid) on ch lorine ch loronium ion Step 2: attack of -
A Catalog of Instructional Films for College Chemistry, Serial Publication Number 42
DOCUMENT RESUME ED 040 035 SE 007 910 AUTHOR Schrager Samuel; And Others TITLE A Catalog of Instructional Films for College Chemistry, Serial Publication Number 42. INSTITUTION Advisory Council on Coll. Chemistry. PUB DATE 69 NOTE 118p. EDRS PRICE EDRS Price MF-$0.50 HC-$6.00 DESCRIPTORS *Catalogs, *Chemistry, *College Science, *Instructional Films, Physical Sciences, *Resource Materials, Secondary School Science IDENTIFIERS Advisory Council on College Chemistry ABSTRACT This is a catalog of instructional films for college chemistry, designed for use by chemistry and other science teachers. The films in this catalog are listed in topical arrangement, which consists of (1) preparatory topics,(2) structure,(3) interaction of radiation with matter, (4) physical states,(5) formulas, equations and calculations,(6) dynamics,(7) thermochemistry, thermodynamics, and electrochemistry,(8) equilibria, (9) inorganic chemistry, (10) organic chemistry,(11) biochemistry, (12) laboratory techniques, (13) physics review,(14) miscellaneous, and(15) special interest. Each topic is divided into one or more sub-topics. Each film is listed alphabetically by title, and is identified further by its producer, length, film type (16mm, 8mm, Super 8), color or black/white, catalog number, and price. A brief description of the contents of each film is included. Starred films in the catalog are those which have been personally used and recommended by members of the panel who compiled this catalog. (LC) U S. DEPARTMENT OF HEALTH, EDUCATION & WELFARE OFFICE OF EDUCATION THIS DOCUMENT HAS BEEN REPRODUCED EXACTLY AS RECEIVED FROM THE i PERSON OR ORGANIZATION ORIGINATING IT POINTS OF VIEW OR OPINIONSI- I. STATED DO NOT NECESSARILY REPRESENT OFFICIAL OFFICE OF EDUCATION POSITION OR POLICY A CATALOG OF INSTRUCTIONAL FILMS FOR COLLEGE CHEMISTRY O v) Al CATALOG OF INSTRUCTIONAL FILMS (16mm, Super 8, and 8mm) FOR COLLEGE CHEMISTRY Advisory Council on College Chemistry Department of Chemistry Stanford University Stanford, California 94305 SERIAL PUBLICATION No. -
NIPPON SHOKUBAI Company Profile
COMPANY PROFILE Osaka Office Kogin Bldg., 4-1-1 Koraibashi, Chuo-ku, Osaka 541-0043, Japan TEL +81-6-6223-9111 FAX +81-6-6201-3716 Tokyo Office Hibiya Dai Bldg., 1-2-2 Uchisaiwai-cho, Chiyoda-ku, Tokyo 100-0011, Japan TEL +81-3-3506-7475 FAX +81-3-3506-7598 https://www.shokubai.co.jp/en/ 2021.6.2000 Nippon Shokubai Group Mission Management Commitment We are deeply dedicated to humanity and the innate human values of sincerity We conduct all of our corporate and honesty. We respect the unique traits and worldview of each individual, embracing diversity and working to promote mutual understanding and trust. activities based upon a deep We recognize that it is the human spirit and point of view that shape our respect for humanity. understanding of management and our actions. A deep respect for humanity is Providing affluence and comfort to people and society, the foundation for all of our corporate activities. with our unique technology We aim at coexisting with We work to create sustainable societies. We believe it is our corporate social society, and working in responsibility to develop positive relationships with all of our stakeholders, as harmony with the environment. well as with the global environment. We pursue technologies We deliver new value that benefits people and society and are dedicated to working as a unified team to develop technology that will open the door to Corporate Credo that will create the future. the future. Safety takes priority over production. By working to expand our business worldwide, we aim to realize our We act on the global stage. -
Oligomerization and Nitration of the Grass Pollen Allergen Phlp5
International Journal of Molecular Sciences Article Oligomerization and Nitration of the Grass Pollen Allergen Phl p 5 by Ozone, Nitrogen Dioxide, and Peroxynitrite: Reaction Products, Kinetics, and Health Effects Anna T. Backes 1,* , Kathrin Reinmuth-Selzle 1 , Anna Lena Leifke 1, Kira Ziegler 1 , Carola S. Krevert 1,† , Georg Tscheuschner 2 , Kurt Lucas 1 , Michael G. Weller 2 , Thomas Berkemeier 1 , Ulrich Pöschl 1 and Janine Fröhlich-Nowoisky 1,* 1 Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany; [email protected] (K.R.-S.); [email protected] (A.L.L.); [email protected] (K.Z.); [email protected] (C.S.K.); [email protected] (K.L.); [email protected] (T.B.); [email protected] (U.P.) 2 Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany; [email protected] (G.T.); [email protected] (M.G.W.) * Correspondence: [email protected] (A.T.B.); [email protected] (J.F.-N.) † Current address: Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, 55128 Mainz, Germany. Citation: Backes, A.T.; Reinmuth-Selzle, K.; Leifke, A.L.; Abstract: The allergenic and inflammatory potential of proteins can be enhanced by chemical Ziegler, K.; Krevert, C.S.; modification upon exposure to atmospheric or physiological oxidants. The molecular mechanisms Tscheuschner, G.; Lucas, K.; Weller, and kinetics of such modifications, however, have not yet been fully resolved. We investigated the M.G.; Berkemeier, T.; Pöschl, U.; oligomerization and nitration of the grass pollen allergen Phl p 5 by ozone (O3), nitrogen dioxide Fröhlich-Nowoisky, J. -
Nitration of Aromatic Compounds: Preparation of Methyl-M-Nitrobenzene
EXPERIMENT 3 (Organic Chemistry II) Pahlavan/Cherif Nitration of Aromatic Compounds: Preparation of methyl-m-nitrobenzoate Purpose a) Study electrophilic aromatic substitution reaction (EAS) b) Study regioselectivity for EAS reactions Chemicals Materials 150 – mL beaker Methyl benzoate 400-mL beaker Sulfuric acid (conc.) 125-mL flask Nitric acid (conc.) Stirring rod Ice Mel-temp Methanol Suction filtration funnel Introduction Unlike nucleophilic substitutions, which proceed via several different mechanisms, electrophilic aromatic substitutions (EAS) generally occur via the same process. Because of the high electron density of the aromatic ring, during EAS reactions electrophiles are attracted to the ring's π system and protons serve as the leaving groups. Equation 1. During SN1 reactions, however, nucleophiles attack an aliphatic carbon and weak Lewis bases serve as leaving groups. Ar - H + E+ Ar - E +H+ Eq. 1 arene electrophile substituted arene 1 Generally, EAS reactions occur in three steps, Scheme I. During Step I, the electrophile is produced, Scheme I Usually, by the interaction of a compound containing the potential electrophile and a catalyst. During Step II, the aromatic π system donates an electron pair to the electrophile, forming a σ bond ( an arenium cation) followed by - deprotonation in step III in the present of a base ( HSO4 ) affording the substituted arene. EAS reactions are generally second-order processes, i.e., first order in electrophile and first order in arene. Thus, Step II. is the rate- determining step (rds); rate = k2 [arene][electrophile]. 2 Electrophilic Aromatic Substitution: Nitration of Methyl Benzoate Benzene rings are components of many important natural products and other useful organic compounds. -
Reactions of Aromatic Compounds Just Like an Alkene, Benzene Has Clouds of Electrons Above and Below Its Sigma Bond Framework
Reactions of Aromatic Compounds Just like an alkene, benzene has clouds of electrons above and below its sigma bond framework. Although the electrons are in a stable aromatic system, they are still available for reaction with strong electrophiles. This generates a carbocation which is resonance stabilized (but not aromatic). This cation is called a sigma complex because the electrophile is joined to the benzene ring through a new sigma bond. The sigma complex (also called an arenium ion) is not aromatic since it contains an sp3 carbon (which disrupts the required loop of p orbitals). Ch17 Reactions of Aromatic Compounds (landscape).docx Page1 The loss of aromaticity required to form the sigma complex explains the highly endothermic nature of the first step. (That is why we require strong electrophiles for reaction). The sigma complex wishes to regain its aromaticity, and it may do so by either a reversal of the first step (i.e. regenerate the starting material) or by loss of the proton on the sp3 carbon (leading to a substitution product). When a reaction proceeds this way, it is electrophilic aromatic substitution. There are a wide variety of electrophiles that can be introduced into a benzene ring in this way, and so electrophilic aromatic substitution is a very important method for the synthesis of substituted aromatic compounds. Ch17 Reactions of Aromatic Compounds (landscape).docx Page2 Bromination of Benzene Bromination follows the same general mechanism for the electrophilic aromatic substitution (EAS). Bromine itself is not electrophilic enough to react with benzene. But the addition of a strong Lewis acid (electron pair acceptor), such as FeBr3, catalyses the reaction, and leads to the substitution product. -
Nitration of Toluene (Electrophilic Aromatic Substitution)
Nitration of Toluene (Electrophilic Aromatic Substitution) Electrophilic aromatic substitution represents an important class of reactions in organic synthesis. In "aromatic nitration," aromatic organic compounds are nitrated via an electrophilic aromatic substitution mechanism involving the attack of the electron-rich benzene ring on the nitronium ion. The formation of a nitronium ion (the electrophile) from nitric acid and sulfuric acid is shown below. The sulfuric acid is regenerated and hence acts as a catalyst. It also absorbs water to drive the reaction forward. Figure 1: The mechanism for the formation of a nitronium ion. The methyl group of toluene makes it around 25 times more reactive than benzene in electrophilic aromatic substitution reactions. Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene (TNT). Figure 2: Reaction of nitric acid and sulfuric acid with toluene. Procedure: 1. Place a 5 mL conical vial, equipped with a spin vane, in a crystallizing dish filled with ice-water placed on a stirrer. 2. Pour 1.0 mL of concentrated nitric acid into the vial. While stirring, slowly add 1.0 mL of concentrated sulfuric acid. 3. After the addition of sulfuric acid is complete, add 1.0 mL of toluene dropwise and slowly over a period of 5 minutes (slow down if you see boiling. Reaction produces a lot of heat). 4. While Stirring, allow the contents of the flask to reach the room temperature. Stir at room temperature for another 5 minutes. 5. Add 10 mL of water into a small separatory funnel. -
Study on the Formation of Dinitramide Using Mixed Acid Nitrating Agents
Articles Indian Journal of Chemical Technology Vol. 9, May 2002, pp. 223-226 Study on the formation of dinitramide using mixed acid nitrating agents G Santhosh, S Venkatachalam*, M Kanakavel & K N Ninan Polymers and Special Chemicals Division, Vikram Sarabhai Space Centre, Trivandrum 695 022, India Received 9 August 2001; revised received 27 February 2002; accepted 21 March 2002 Nitration of ammonium sulphamate was carried out using a mixture of sulphuric acid and nitric acid at -30 to - 40°C. The mole ratio of sulphuric acid to nitric acid was varied from 0 to 4 and the extent of formation of ammonium dinitramide (ADN) was meas:red. The initial yield of ADN increases with increase of sulphuric acid content in the acid mixture and starts decreasing as the reaction time is increased. The variation of product yield with change in reaction time and total acid concentration was studied. There has been a lot of interest in recent years for the Experimental Procedure development of new high energy halogen-free Materials oxidizers like ammonium dinitramide(ADN), Ammonium sulphamate AR (SRL, Bombay) was hydrazinium nitroformate(HNF), hexanitrohexaaza powdered well in a mortar and pestle and was further isowurtzitane(CL-20), 1,3,3-trinitroazetidine (TNAZ) dried in vacuum. Conc. H S0 98% (Qualigens, Bombay) was used etc., having high density and heat of formation I. 2 4 as received. Ammonium dinitramide (ADN) is the ammonium salt Fuming HN0 > 98% was distilled in the laboratory of 1,1 ,3,3-tetraoxo-l ,2,3-triazapropene anion. 3 from a mixture of 1: 1 by weight of fuming HN0 Dinitramide salts are useful oxidizers for high energy 3 (92%) with conc.