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Species with higher electronegativity have tightly held ... Bimolecular or Unimolecular refers to the number of specie(s) involved at the transition state. ...
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Title: PowerPoint Author: Seiki Saito Last modified by: Seiki Saito Created Date: 8/22/2005 1:40:17 AM Document presentation format
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For SN2, HCCI, CH2=CHI, CH3CH2I, FCH2CH2I. What is CH3CH2I? ... is react compound A with BH3, then alkaline H2O2, next PBr3, and finally cyanide? ...
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SN1 and SN2 Reactions SN1 SN2 Rate =k[RX] =k[RX][Nuc:-] Carbocation intermediate? Y N Stereochemistry mix Inversion of configuration Rearrangement ~H, ~ CH3 possible
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??? ?????? ???? SN1. ???? ???????? ???. ?????? ???????? ... acetone. ???????? ??????. Reaction coordinate. E. ??? ??????. E. E. E E. ??? ???????? ?????? ...
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RBr solvolysis in aqueous formic acid. Alkyl bromide Class Relative rate. CH3Br Methyl 1 ... nucleophile (solvolysis) SN2 mechanism in the presence of a good ...
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Substitution and Elimination Competing Reactions SN1 & SN2 vs. E1 and E2 Formation of Alkenes Two Reaction Types Two Reaction Types Elimination versus Substitution ...
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Nucleophile weak lewis base (neutral) Strong lewis base, high conc. ... Substitution: preferred with primary halides and polarizable, small. nucleophiles ...
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SN1, SN2, E1, and E2 Flow Chart Dr. Susan F. Hornbuckle Associate Professor of Chemistry Clayton State University SN1, SN2, E1, and E2 Flow Chart Dr. Susan F ...
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Op Code has been decoded. ... the Control Unit can ascertain the Op Code Class as well as the Instruction ... to 1] Execute the Op Code after going to the ...
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Potential Energy Diagrams for Multistep Reactions: The SN1 Mechanism Recall... the potential energy diagram for proton transfer from HBr to water Extension The ...
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081 (sn1) (ch3)3cbr ...
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Mechanismus der Eliminierung E1 E2 Energetische Betrachtungen zur E1/2 vgl. mit SN1/2 Ende der Ausf hrungen ...
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Unresolved Supply Net IN SP1 SN1 SN1 EN SW EN SW SN2 OUT SP2 SN2 SN4 Example 1. SN2 is Unresolved; 1 Driver SW out port Example 2. SN1 is Unresolved; 1 Source ...
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Chapter 10 Nucleophilic Substitution: The SN1 and SN2 Mechanisms Assignment for Chapter 10 We will cover all the sections in this chapter, except Sections 10.12 and ...
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Size Matters Size - Stability When SN2 Cant Happen SN1 and SN2 Prefer Opposites SN2 and E2 are Competitive SN2 and E2 are Competitive SN2 and E2 are Competitive ...
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TEMA 13 AMINAS TEMA 13 AMINAS R3C-NH2 Hydrolysis NaOH soln. R3C-NHCONH2 SN1 R3C(+) NH2CONH2 (urea) 6. RCH2-NH2 Reduction LiAlH4 RCO-NH2 Addition / Elimination RCOX NH3 5.
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with second order kinetics. Most tertiary compounds undergo SN1 reactions. with first order kinetics. Most nucleophilic substitution reactions fit one ...
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tertiary, allylic. or benzylic. H2O. Grignard. Reaction. H3O Mg ... 3o, allylic, benzylic alcohols by SN1. the halide. is often. racemized (acid assisted) ...
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... stereochemical outcome if the leaving group is displaced from a chiral center? ... For an SN1 reaction at a chiral center, the R and S enantiomers are formed in ...
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nucleophilicity is the affinity of a species ... Steric Hindrance. 30 react with SN1 mechanism, 10 with SN2 and 20 can undergo both ... Steric hindrance for SN2 ...
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1-Bromopropane, bromoethane, and bromomethane do not react well under these conditions. ... transform by the SN1 or SN2 mechanism depending upon conditions. ...
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???, ?? ??????? ????? ????? ????? ????? SN1. ... conjugation. hyperconjugation. ???? ?????. A3. R1. R1. R2. R2. R3. R4. A1. A1. A2. R1 1.531 1.443 ...
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This mechanism is designated SN1 where S = substitution N = nucleophilic 1 = unimolecular (only one species is involved in the rate-determining step) ...
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Vinyl Halides and Aryl Halides. Vinyl and aryl halides do not undergo SN1 or SN2 reactions, because heterolysis ... form a highly unstable vinyl or aryl cation. ...
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There is a strong difference in reactivity between isolated (unconjugated) ... Consider the nucleophilic substitution of an allylic halide via an SN1 mechanism ...
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Alc nes CnH2n Substitution vs limination SN1 v E1 Substitution vs limination D shydratation des alcools D shydratation des alcools - le m canisme ...
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Note that at a primary carbon atom, only SN2 and no SN1 substitution is possible ... E2: all processes occur at the same time. 23. Example of an E1cB reaction ...
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RBr solvolysis in aqueous formic acid. Alkyl bromide Class Relative rate. CH3Br Methyl 1 ... formic acid 58 5,000. water 78 150,000. Table 8.6. SN1 Reactivity ...
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It is accepted now that dark matter is observed(SN1,WMAP). There are several particle physics ... compared to X-ray images(red) Gravitational lensing ...
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Walter Hoogland, Arjen van Rijn, Kors Bos, Wim Heubers. From SARA ... Dutch National Supercomputer. CRAY C90 now. SN1-MIPS with 1024 CPU's and 1 TB RAM ...
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Cl: R. ENERGY PROFILE. SN1 ANIMATION. C. CH3. Ph. Cl: R ... Cl: C. R. CH3. Ph. PLANAR. CARBOCATION. ENERGY PROFILE. C. R. CH3. H. C. R. CH3. Ph. ENERGY PROFILE ...
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This supports the SN1 explanation invoked on the previous . ... Since the oxygen has pulled away more from this carbon (the more substituted one) ...
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Title: Author: USER Last modified by: USER Created Date: 9/19/2002 6:47:29 AM Document presentation format:
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Title: PowerPoint Author: user Last modified by: User Created Date: 4/17/2004 10:59:41 AM Document presentation format:
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Acetone (CH3COCH3) DMSO. DMF. Nucleophiles ... And even... acetone. Polar Aprotic Solvents. Polar Aprotic Solvents. do not H bond ...
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Title: PowerPoint Presentation Author: CCNMTL Last modified by: R R Created Date: 6/20/2001 4:30:08 PM Document presentation format: On-screen Show
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Solvent is the nucleophile KI in Acetone at 25 b b b b C C Y Nu R1 R2 R3 Nu Y R1 H H 80% Ethanol-water at 50 60 C About same reactivity More common and IUPAC ...
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On going from 1 to 2 and 3 haloalkanes, the steric crowding about. the carbon increases. increase in steric hindrance for approaching nucleophile ...
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Title: Chap.5 halogenated hydrocarbon Author: yyc Last modified by: yych Created Date: 6/6/2003 1:18:56 AM Document presentation format:
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Substitution and Elimination Reaction of Alkyl Halides By: Ismiyarto, MSi * 4 18 18 9 9 21 21 2 4 6 6 8 11 6 2 6 26 29 32 H C C A B X Y H H H syn-Addition; Metal ...
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Characteristics of SN2 Reactions Single Step Mechanism Inversion of configuration SN2 reactions are generally reliable only when the alkyl halide is primary ...
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Organic halides are flammable, and ... Reaction Mechanism SN2 reaction occurs in one smooth step and gives the product with the inverted configuration with ...
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Reattivit degli alogenuri alchilici Gli alogenuri alchilici sono caratterizzati dalla presenza di un gruppo X, attaccato direttamente al carbonio.
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Title: OC 2/e Ch 8 S & E Subject: Alkyl halides, etc. Author: Bill Brown Last modified by: Bill Brown Created Date: 7/15/1997 1:28:14 PM Document presentation format
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HX is lost from the alkyl halide and an alkene is formed. b-carbon. a-carbon. new p-bond is formed ... Reactions of Secondary Alkyl Halides ...
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11.1 The Discovery of Nucleophilic Substitution Reactions Walden 11.2 The SN2 Reaction Reaction Kinetics SN2 Process SN2 Transition State 11.3 ...
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Title: Slide 1 Author: Marlon Konzen Last modified by: Marlon Konzen Created Date: 2/16/2005 4:49:28 PM Document presentation format: Apresenta o na tela
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We will cover all the sections in this chapter, except Sections 10.12 and 10.13 ... water, ethanol, methanol, acetic acid, and formic acid. WWU -- Chemistry ...
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Substitution and Elimination Reaction of Alkyl Halides By: Ismiyarto, MSi ALKIL HALIDA Manfaat (Pestisida, Bahan Dasar Sintesis Alkohol, Alkena) Struktur (Metil ...
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solvolysis of t-butyl chloride in water. EXAMPLE 2 ... two steps. 55oC. k1 = 0.010 liter/mole-sec. substitution. nucleophilic. unimolecular. alkene (via E1) ...
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Title: E2 Author: Jedida Last modified by: Jedida Created Date: 8/10/2006 6:11:21 AM Document presentation format
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* Figure: 08-04-04UN Title: Relative rates of reaction for different alkyl halides in SN2 reactions. Caption: If an alkyl iodide reacts under the same conditions as ...
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Click a box below to go to the mechanism Click here for advice Homolytic Free Radical Substitution Free Radical Addition Heterolytic Electrophilic Addition
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