(a)
To determine: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Interpretation: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Concept introduction: The
The elimination of hydrogen halide molecule is termed as dehydrohalogenation. This type of reaction has an unfavourable enthalpy change but a favourable entropy change.
(b)
To determine: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Interpretation: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Concept introduction: The chemical reaction that consists of an alkyl halide, a good leaving group that reacts with Lewis base to form an alkene is termed as elimination reaction. In this reaction there is complete removal of the leaving group without any substitution.
The elimination of hydrogen halide molecule is termed as dehydrohalogenation. This type of reaction has an unfavourable enthalpy change but a favourable entropy change.
(c)
To determine: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Interpretation: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Concept introduction: The chemical reaction that consists of an alkyl halide, a good leaving group that reacts with Lewis base to form an alkene is termed as elimination reaction. In this reaction there is complete removal of the leaving group without any substitution.
The elimination of hydrogen halide molecule is termed as dehydrohalogenation. This type of reaction has an unfavourable enthalpy change but a favourable entropy change.
(d)
To determine: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Interpretation: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Concept introduction: The chemical reaction that consists of an alkyl halide, a good leaving group that reacts with Lewis base to form an alkene is termed as elimination reaction. In this reaction there is complete removal of the leaving group without any substitution.
The elimination of hydrogen halide molecule is termed as dehydrohalogenation. This type of reaction has an unfavourable enthalpy change but a favourable entropy change.
(e)
To determine: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Interpretation: The products formed by sodium hydroxide-promoted dehydrohalogenation of the given compound,
Concept introduction: The chemical reaction that consists of an alkyl halide, a good leaving group that reacts with Lewis base to form an alkene is termed as elimination reaction. In this reaction there is complete removal of the leaving group without any substitution.
The elimination of hydrogen halide molecule is termed as dehydrohalogenation. This type of reaction has an unfavourable enthalpy change but a favourable entropy change.
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Organic Chemistry (9th Edition)
- 1. 2-bromobutane + cyclohexanol + NaH à (major product) c. 2-butoxycyclohexane a.. 2-butene reaction b. 1-butene d. no e. something else! 2. t-butylbromide + sodium ethoxide in ethanol à (major product) a. 2-methylpropene reaction b. t-butyl ethyl ether c. 1-methylbutene d. no e. something else! 3. potassium t-butoxide + 1-bromobutane in t-butyl alcohol room temperature à (major product) a. 1-butene reaction c. 2-methylpropene d. no b. butyl t-butyl ether e. something else! 4. t-butyl bromide + boiling hot water à (major product) a. 2-methylpropene reaction b. t-butyl ethyl ether c. t-butanol d. no e. something else! 5. 2-chloropropane + acetic acid (2 eq) / KOH (1 eq) / DMF à(major product) c. b. d. no reaction e. something а. HO. else! Br KOH / DMSO 6. b. 2-methyl-1-propanol d. 1,2- a. 2-methylpropene propanediene c. no reaction e. something else! 7. cyclopentanol+ NaH + DMSO + bromopropane à(major product) a. cyclopentene reaction b. propene e. something else!! c. propyl cyclopentyl…arrow_forward1. Which molecule reacts fastest with ethanol by SN1 mechanism? a. 1-bromopentane b. 3-bromopentane c. 2-bromo-2-methylbutane d. 1-bromo-2,2-dimethylpropanearrow_forwardChoose the two alkyl bromides and the hydrogenation method that must be used to synthesize these alkenes from acetylene. Enter your answer as two letters in alphabetical order, followed by a number; i.e. ac2, not ca2. Do not use punctuation. Alkyl Halides a. CH3CH₂Br b. CH3(CH₂)4Br c. CH3(CH2)sBr d. CH3(CH₂) Br e. CH3(CH₂)7Br f. CH₂(CH₂) Br g. CH3(CH₂)12Br Hydrogenation Method 1. H₂, Lindlar's catalyst 2. Na, NH3 (1) CH3 Alkene #1: H₂C Alkene #2: H₂C CH3arrow_forward
- 2. Which of the following alkynes will form only 1 product in acid-catalyzed hydration? a. 2-pentyne b. 3-hexyne c. 3-pentyne d. 1-hexyne 3. Which of the following statements best describes the general reactivity of alkynes? a. An alkyne reacts as an electrophile and is, therefore, electron poor. b. Alkynes undergo electrophilic addition reactions just like alkenes. c. An alkyne reacts as an electrophile and is therefore electron-rich. d. An alkyne reacts as a nucleophile and is therefore electron-poor.arrow_forwardWhich of the following compounds would be used to prepare the alkene shown below by the Wittig reaction? A. cyclohexyl bromide/propanal B. cyclohexanone/ethyl bromide C. cyclohexyl bromide/isopropyl bromide D. cyclohexanone/ethanalarrow_forwardChoose the two alkyl bromides and the hydrogenation method that must be used to synthesize these alkenes from acetylene. Enter your answer as two letters in alphabetical order, followed by a number; i.e. ac2, not ca2. Do not use punctuation. a. CH3 CH₂ Br e. CH3 (CH₂)7 Br b. CH3 (CH₂)4 Br f. CH3 (CH2)8 Br c. CH3 (CH2)5Br g. CH3 (CH2) 12 Br d. CH3 (CH₂)6 Br Hydrogenation Method 1. H₂, Lindlar's catalyst 2. Na, NH3 (1) Alkene #1: Reagents available H₂C Alkene #2: H3C. CH3 CH3arrow_forward
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- Choose the two alkyl bromides and the hydrogenation method that must be used to synthesize these alkenes from acetylene. Enter your answer as two letters in alphabetical order, followed by a number; i.e. ac2, not ca2. Do not use punctuation. a. CH3 CH₂ Br e. CH3 (CH₂)7 Br b. CH3 (CH2)4 Br f. CH3 (CH₂)8 Br c. CH3 (CH₂)5 Br g. CH3 (CH2) 12 Br d. CH3 (CH₂)6 Br Hydrogenation Method 1. H₂, Lindlar's catalyst 2. Na, NH3 (1) Alkene #1: H3C Reagents available Alkene #2: H3C CH3 CH3arrow_forward57. The order of decreasing ease of dehydrohalogenation OCH₂C I. >-CH2CH2CI A. I>II>III>IV B. CH3CH₂CHCICH3 C. II. CHOHCH₂CH3 D. CH3CHBRCH₂CH3 CH₂CH2C1 B. III>II>I>IV 58. Which of the following reactions will produce the highest percentage yield of 1-butene. OH A. CH3CH₂CH(N* (CH3)3)CH3 alc. KOH conc. H₂SO4 heat NaOC₂H5 III. C₂H5OH of the following compounds is: CH2CH₂CI CH₂CH₂C1 CH₂ -CH₂CH2CI C. III>IV>II> I IV. D. IV>III>II>Iarrow_forward4. Write in the product, including stereochemistry where relevant, for these reactions. a) b) cyclohexene 1-pentene 1. Os04 2. NaHSO3 1. 03 2. Zn, H* →→arrow_forward
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