Chemical Biology Exam Solutions - 3751 Verified Questions

Chemical Biology

Exam Solutions

Course Introduction

Chemical Biology explores the interface between chemistry and biology, focusing on the use of chemical techniques and principles to understand and manipulate biological systems. This course covers topics such as the chemical structure and reactivity of biomolecules, enzyme catalysis, molecular recognition, chemical probes for studying cellular processes, and the design of small molecules for therapeutic purposes. Through lectures and case studies, students gain insight into how chemical tools are employed to investigate and influence biological pathways, leading to advances in drug discovery, diagnostics, and biotechnology.

Recommended Textbook

Organic Chemistry 3rd Edition by David R. Klein

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27 Chapters

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Page 2

Chapter 1: A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

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Sample Questions

Q1) What is the correct order of increasing electronegativity for Rb, F and O?

A) Rb < F < O

B) Rb < O < F

C) O < F < Rb

D) F < Rb < O

E) None of these

Answer: B

Q2) The carbon and oxygen atoms in carbon monoxide are connected by which type of bond(s)?

A) a sigma ( \(\sigma\)) bond

B) two sigma ( \(\sigma\)) bonds

C) a pi (\(\pi\)) bond

D) two pi (\(\pi\)) bonds

E) both A and D

Answer: E

Q3) Ar, K⁺, and Cl^- have equal numbers of electrons, and are considered isoelectronic. Provide the ground state electron configuration for them. Answer: 1s²2s²2p⁶3s²3p⁶

Page 3

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Chapter 2: Molecular Representations

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Sample Questions

Q1) Draw the resonance hybrid of C₆H₆.

Answer: 11ea894b_ac68_7222_bba7_55525f20a2a7_TB4454_00_TB4454_00

Q2) The spreading of positive or negative charge over two or more atoms in a compound is called_______.

A) isomerism

B) delocalization

C) stereoisomerism

D) localization

E) None of these

Answer: B

Q3) Draw the Lewis structure for CH₃C C(CH₂)₃C(CH₃)₃.

Answer: 11ea894b_ac55_adb9_bba7_b731aff568d8_TB4454_00_TB4454_00

Q4) Draw a bond-line structure for each constitutional isomer with molecular formula C₄H₁₀O.

Answer: 11ea894b_ac5a_8fdb_bba7_8bcc5aebc515_TB4454_00_TB4454_00 11ea894b_ac5a_8fdc_bba7_e3d8190b09e5_TB4454_00_TB4454_00

Q5) Draw the resonance hybrid of CH₂CHCHCHCH₂⁺.

Answer: 11ea894b_ac68_7223_bba7_ffc309680577_TB4454_00_TB4454_00

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Chapter 3: Acids and Bases

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Sample Questions

Q1) What is the leveling effect?

Answer: It is the deprotonation of a solvent by a base or protonation of solvent by an acid.

Q2) Which of the following compounds is most acidic?

A) HF

B) HCl

C) HBr

D) HI

Answer: D

Q3) Identify a Brønsted-Lowry acid.

A) proton acceptor

B) proton donor

C) species remaining after acid is deprotonated

D) species remaining after base is protonated

Answer: B

Q4) What is a counterion in (CH₃)₃COK?

Answer: K⁺

Q5) Draw the conjugate base of CH₃C\(\equiv\)CH.

Answer: 11ea894b_ac6b_0a50_bba7_bf7da56a2507_TB4454_00_TB4454_00

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Chapter 4: Alkanes and Cycloalkanes

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Sample Questions

Q1) Draw a chair conformation of cyclohexane showing all of the equatorial H's.

Q2) Draw an energy diagram for the conformational analysis of propane.

Q3) Identify the size of the hydrocarbon that is used in jet fuel.

A) C₁ - C₄

B) C₅ - C₁₂

C) C₁₂ - C₁₈

D) C₁₂ and higher

Q4) Draw the most stable chair conformer of the most stable isomer of 1,3,5-trimethylcyclohexane.

Q5) What is the eclipsing cost of Br and H if the energy difference between the staggered and eclipsed conformations of bromoethane is 13 kJ/mol?

Q6) Identify the size of the hydrocarbon that is used in gasoline.

A) C₁ - C₄

B) C₅ - C₁₂

C) C₁₂ - C₁₈

D) C₁₂ and higher

Q7) What is the structure of an isopropyl group?

Q8) Draw the lowest energy chair conformer of the most stable isomer of 4-isopropyl-1,2-dimethylcyclohexane.

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Chapter 5: Stereoisomerism

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Sample Questions

Q1) What is the percentage of the S enantiomer in a sample of carvone that has a specific rotation of 30, given that the specific rotation of (R)-carvone is 61?

A) 25.5%

B) 51%

C) 49%

D) 74.5%

Q2) Rank the following from highest to lowest priority according to the Cahn-Ingold-Prelog system.

I. -CH₃ II. -CN III. -CH₂OH IV. -Br

Q3) What is the specific rotation of pure (S)-carvone if a sample of (R)-carvone of 85% ee has a specific rotation of 52?

A) 61

B) 64

C) 0

D) 61

Q4) Rank the following from highest to lowest priority according to the Cahn-Ingold-Prelog system.

I. -F II. -H III. -OH IV. -SH

Q5) How many stereoisomers are possible for 2,3-dimethylbutane?

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Chapter 6: Chemical Reactivity and Mechanisms

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Sample Questions

Q1) Does a reaction with a H of 14 kJ/mol and a S of 150 J/mol·K at 298 K favor reactants or products?

Q2) Does a reaction with a H of 20 kJ/mol and a S of 10 J/mol·K at 298 K favor reactants or products?

Q3) Does a reaction with a value of 0 for G favor reactants or products?

Q4) Identify the nucleophilic atom in the following molecule, Me₃P.

A) P

B) C

C) H

D) Me

Q5) Draw an energy diagram for an exothermic three-step reaction.

Q6) Predict the sign of G for an exothermic reaction with an increase in entropy.

A) positive

B) negative

C) no change

D) cannot predict without additional information

Q7) Does a reaction with a positive S and a positive H favor reactants or products?

Q8) Does a reaction with a K_eq = 10 favor reactants or products?

Q9) Draw an energy diagram for an endothermic reaction with two steps.

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Chapter 7: Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

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Sample Questions

Q1) Provide the structure for cis-1,2-dibromocyclopentane.

Q2) Provide the structure for 1-chloro-4-isopropylheptane.

Q3) Draw the transition state for the following reaction. (S)-1-iodo-3-methylpentane + NaSCH₃

Q4) Which of the following compounds will undergo rearrangement during solvolysis reaction?

A) 3-iodo-5-methylheptane

B) 3-iodo-2-methylheptane

C) 3-iodo-3-methylheptane

D) 3-iodoheptane

E) cis-1-iodo-3-methylcyclohexane

Q5) Which of the following is a secondary alkyl halide?

A) (CH₃)₂CHCH₂Cl

B) (CH₃)₂CClCH₂CH₃

C) (CH₃)₂CHCHClCH₃ D)

(CH₃)₂CHCH₂CCl(CH₃)₂

Page 9

Q6) Provide the structure for (4R,8S)-4-iodo-2,2,8-trimethyldecane.

Q7) Draw the isomer of 2-bromo-1,1,3-trimethylcyclohexane that would be more reactive in an E2 elimination.

Q8) Draw the structure of 3-methylcyclopentene.

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Page 10

Chapter 8: Addition Reactions of Alkenes

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Sample Questions

Q1) Draw Fischer projection (s) of the major product(s) of the reaction between (Z)-3-methyl-3-hexene and catalytic OsO₄ with NMO.

Q2) Which of the reagents below are expected to convert cyclopentene into cyclopentane?

A) H₂ and Ni

B) H₂O

C) Heat

D) Zn, H₃O⁺

E) Light

Q3) Addition reactions of alkenes are characterized by _________.

A) formation of a bond

B) addition of two groups across a double bond

C) breaking of a bond

D) A and B

E) B and C

Q4) The alkene precursor to acetone is __________.

Q5) Most bonds are quite prone to reaction with an ____________________, also referred to as electron-seeking reagents.

Q6) The alkene precursor to ethanol is __________.

Page 11

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Chapter 9: Alkynes

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Sample Questions

Q1) What are the products of the reaction shown below? CH₃OH + CH₃C C^-Na⁺ ?

A) CH₃C CCH₃ + Na⁺OH^-

B) CH₃C CH + CH₃O^-Na⁺

C) CH₃C COCH₃ + Na⁺OH^-

D) CH₃OC CH + Na⁺CH₃^-

E) no reaction

Q2) Which of the following statements is true about propyne, H-C C-CH₃?

A) It contains a total of three sigma bonds.

B) It contains a total of three pi bonds.

C) The H-C C bond angle is about 109.5°.

D) The C C-C bond angle is 180°.

E) All carbon-carbon bonds are of equal length.

Q3) Select the best reagent expected to convert 3-heptyne to cis-3-heptene.

A) NaNH₂, NH₃

B) Na, NH₃

C) H₂, Lindlar's catalyst

D) Both A and C

E) Both B and C

Q4) Describe the shape for acetylene.

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Chapter 10: Radical Reactions

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Sample Questions

Q1) Draw the arrows to show the propagation steps in the chlorination of propane to produce 2-chloropropane.

Q2) Compound A, C₆H₁₂ reacts with HBr/ROOR to give compound B, C₆H₁₃Br. Compound C, C₆H₁₄, reacts with bromine and light to produce compound B, C₆H₁₃Br. Suggest structures for compounds A, B, and C.

Q3) How many constitutional isomers are possible if propane is dichlorinated? Draw them.

Q4) Upon treatment with NBS and irradiation with UV light, 1-ethyl-4-methylbenzene produces exactly three monobrominated compounds (including stereoisomers). Draw the products of this reaction.

Q5) Thermal cracking of butane can produce ethyl radicals via homolytic cleavage. Give the arrows to show this process.

Q6) Upon treatment of 1-methylcyclopentene with NBS and irradiation with UV light, exactly nine compounds (including stereoisomers) are formed. Draw all nine products.

Q7) Propose a synthesis of 2-butyn-1-ol from propane.

Q8) Propose a synthesis of polyethylene from ethane.

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Chapter 11: Synthesis

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Sample Questions

Q1) Which of the following sequences of reagents will move the alcohol functional group from the tertiary position of 1-methylcyclohexanol to a secondary position?

A) 1. KOtBu; 2. Hg(OAc)₂, H₂O; 3. NaBH₄

B) 1. TsCl, pyr; 2. KOtBu; 3. BH₃-THF; 4. H₂O₂, NaOH

C) 1. H₂SO₄, heat; 2. BH₃THF; 3. H₂O₂, NaOH

D) 1. TsCl, pyr; 2. NaOH; 3. BH₃THF; 4. H₂O₂, NaOH

E) C and D will both work

Q2) Which of the following sequences converts 3-methyl-1-pentene into 3-bromo-3-methylpentane?

A) 1. Br₂; 2. NaOH; 3. HBr

B) 1. Br₂, h\(\upsilon\); 2. H₂, Pt

C) 1. H₂, Pt; 2. Br₂, h\(\upsilon\)

D) 1. NBS, h\(\upsilon\); 2. H₂, Pt

E) 1. HBr, ROOR; 2. NaOH; 3. HBr

Q3) Propose a synthetic route to convert 3-methyl-2-butanol into 3-methyl-1-butanol.

Q4) Propose a synthesis of propanoic acid from acetylene.

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Chapter 12: Alcohols and Phenols

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Sample Questions

Q1) Identify the type of bonding between molecules of alcohol.

A) ion-ion

B) van der Waals forces

C) hydrogen bonding

D) ion-dipole

E) London dispersion

Q2) Provide the structure for 5-chloro-2-propyl-1-heptanol.

Q3) Provide the structure for 6-sec-butyl-7,7-dimethyl-4-decanol.

Q4) Identify rubbing alcohol.

A) methanol

B) 2-propanol

C) ethanol

D) 1-butanol

E) 1-propanol

Q5) Provide the structure for (2R,3S) -2-bromo-1,3-pentanediol.

Q6) Provide the reagent(s) necessary to prepare 1-isopropylcyclopentanol using a Grignard reaction.

Q7) Provide the reagent(s) necessary to convert cyclohexanol to cyclohexane..

Page 15

Q8) Give the structure for (E)-4,5,5-trimethyl-3-hepten-1-ol.

Q9) Nature's catalysts are called ________.

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Chapter 13: Ethers and Epoxides; Thiols and Sulfides

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Sample Questions

Q1) Which of the following crown ether solvates lithium ions?

A) 12-crown-5

B) 12-crown-4

C) 15-crown-5

D) 18-crown-6

E) none of these

Q2) Provide the structure for tetrahydrofuran.

Q3) Can you prepare diisopropyl ether as the major product by heating 2-propanol in the presence of sulfuric acid? Explain your answer.

Q4) Which one of the following reactions would produce t-butyl methyl ether in high yield?

A) t-butyl chloride + sodium methoxide

B) t-butanol + methanol in presence of H₂SO₄ at 140°C

C) t-butyl bromide + bromomethane in the presence of NaOH

D) sodium t-butoxide + bromomethane

Q5) Identify the conditions of oxymercuration-demercuration.

A) anti-Markovnikov, rearrangement possible

B) anti-Markovnikov, no rearrangement possible

C) Markovnikov, rearrangement possible

D) Markovnikov, no rearrangement possible

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Chapter 14: Infrared Spectroscopy and Mass Spectrometry

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Sample Questions

Q1) Which of the following is expected to be the base peak in the mass spectrum of 2-methyl-2-butanol?

A) 73

B) 55

C) 43

D) 31

E) 59

Q2) Which of the following wavenumber corresponds to the fingerprint region on an IR spectrum?

A) 1500 - 4000 cm^-1

B) 400 - 4000 cm^-1

C) 400 - 1500 cm^-1

D) 2100 - 2300 cm^-1

E) 1600 - 1850 cm^-1

Q3) Provide a molecular formula that is consistent with the following mass spectral data. M⁺ at m/z = 73, relative height = 86.1% (M+1)⁺ at m/z = 74, relative height = 3.2%

Q4) Warmer objects emit more __________ radiation.

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Page 18

Chapter 15: Nuclear Magnetic Resonance Spectroscopy

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Sample Questions

Q1) Draw a structure, with a formula of C₄H₉Br, which has an integration of 3H, 2H, 2H, and 2H.

Q2) Propose a structure for a compound, with molecular formula C₈H₁₄O₃, that fits the following spectroscopic data:

IR: 1820cm^-1, 1760cm^-1 ¹H NMR: 1.0 \(\delta\) (triplet, 6H), 1.6 \(\delta\) (sextet, 4H), 2.2 \(\delta\) (triplet, 4H)

Q3) How many ¹H NMR signals does 2-chloro-3-methyl-2-butene exhibit?

A) 1

B) 2

C) 3

D) 4

E) 5

Q4) Draw a structure, with a formula of C₅H₁₃N, which has an integration of 9H, 3H, 1H.

Q5) List the most common nuclei that are used in NMR.

Q6) NMR is an abbreviation for ____________ ____________ __________.

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Chapter 16: Conjugated Pi Systems and Pericyclic Reactions

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Sample Questions

Q1) The Diels Alder reaction is a concerted reaction. Define concerted.

A) The product contains a cyclic ring.

B) The diene must be in the s-cis conformation to react.

C) All changes in bonding (bond making and bond breaking) occur simultaneously.

D) It is an endothermic reaction.

E) Both exo and endo products are formed.

Q2) Identify the color of a compound that absorbs yellow light.

A) orange

B) green

C) red

D) blue

E) violet

Q3) Identify the pericyclic reaction in which two sigma bonds are formed and two pi bonds are broken.

A) sigmatropic rearrangement

B) cycloaddition reaction

C) electrolytic reaction

D) this is not a pericyclic reaction

Q4) Provide the structure of the 1,4 addition product for the reaction of 1,3-hexadiene with Br₂/CCl₄.

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Chapter 17: Aromatic Compounds

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Sample Questions

Q1) According to the molecular orbital theory how many molecular orbitals are formed when the six p-orbitals of benzene combine?

A) 6

B) 5

C) 4

D) 3

E) 2

Q2) Identify the number of \(\pi\) electrons present in an antiaromatic compound.

A) 4n + 2

B) 2n + 2

C) 4n

D) none

E) none of these

Q3) Provide the reagent(s) necessary to convert toluene to benzoic acid.

A)

Na₂Cr₂O₇/H₂SO₄/H<sub >2</sub>O

B) 1. NBS, \(\Delta\) 2.NaOH

C) 1. LiAlH₄ 2. H₃O⁺

D) H₂, Pd

E) 1. CO_2, 2. H₃O⁺

Page 21

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Chapter 18: Aromatic Substitution Reactions

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Sample Questions

Q1) Which of the following substituents will not direct the incoming group to the ortho/para position during electrophilic aromatic substitution?

A) -CH₂CH₃

B) -CF₃

C) -OCH₃

D) -NHCH₃

E) -Br

Q2) Predict the major product for the reaction between benzene and 2-chlorobutane in the presence of AlCl₃.

A) chlorobenzene

B) sec-butylbenzene

C) ethylbenzene

D) isopropylbenzene

E) t-butylbenzene

Q3) Give the preferred products from the nitration of bromobenzene.

Q4) Aryl and vinyl halides cannot be used in the Friedel-Crafts alkylation reaction, because they do not __________.

Q5) A nitro group ___________ the benzene ring to make it __________ reactive than benzene.

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Chapter 19: Aldehydes and Ketones

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Sample Questions

Q1) Benzaldehyde is less reactive than ethanal towards nucleophilic addition reactions. Explain why using words as well as structural drawings.

Q2) Which one of the following compounds will yield 1-hexanol when treated with butylmagnesium bromide followed by acid workup?

A) 1-hexanol

B) formaldehyde

C) propanal

D) oxirane

E) hexanal

Q3) A compound with an OH and an OR group attached to the same carbon is known as ______.

A) an acetal

B) a hemiacetal

C) a hydrate

D) a vicinal hydrate

E) none of these

Q4) Using 1-propanol as your only source of carbon, and using any other reagents as appropriate, write a complete stepwise synthesis for 3-hexanone.

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Chapter 20: Carboxylic Acids and Their Derivatives

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Sample Questions

Q1) A compound with molecular formula C₈H₁₄O₃ exhibits a triplet at \(\delta\) 1.0 (6H), a sextet at \(\delta\) 1.6 (4H) and a triplet at \(\delta\) 2.2 (4H) in its ¹H NMR spectrum. Its IR spectrum shows two strong absorption bands near 1850 and 1750 cm^-1. What is the structure for this compound?

Q2) Provide the reagents necessary to convert 4,5-dimethyl-1-hexanol into N-cyclopentyl-4,5-dimethylhexanamide.

Q3) Provide the structure for acetic formic anhydride.

Q4) Give the IUPAC name for oxalic acid.

A) ethanedioic acid

B) propanedioic acid

C) butanedioic acid

D) pentanedioic acid

E) benzoic acid

Q5) Give the IUPAC name for malonic acid.

A) ethanedioic acid

B) propanedioic acid

C) butanedioic acid

D) pentanedioic acid

E) benzoic acid

Page 24

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Chapter 21: Alpha Carbon Chemistry: Enols and Enolates

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Sample Questions

Q1) Which one of the following compounds is most acidic?

A) ethyl acetoacetate

B) 2-butanone

C) ethyl pentanoate

D) 1-butanol

E) 3-pentanone

Q2) Which of the following bases will completely convert 1,4-cyclohexanedione into an enolate?

A) sodium hydroxide

B) sodium ethoxide

C) LDA

D) sodium hydride

E) both C and D

Q3) How many alpha hydrogens are in 2-pentanone?

A) 1

B) 2

C) 3

D) 4

E) 5

Q4) In an aldol mechanism, the ___________ attacks the aldehyde.

Page 25

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Chapter 22: Amines

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Sample Questions

Q1) Identify the strongest base.

A) 4-chloroaniline

B) 4-nitroaniline

C) 4-aminobenzonitrile

D) aniline

E) 4-aminoanisole

Q2) A compound with molecular formula C₄H₁₁N exhibits a triplet at \(\delta\) 0.9 (3H), a doublet at \(\delta\) 1.1 (3H), a quintet at \(\delta\) 1.4 (2H), a singlet at \(\delta\) 1.7 (2H) and a sextet at \(\delta\) 2.8 (2H) in its ¹H NMR spectrum. Its IR spectrum shows two medium absorption bands near 3400 cm^-1. What is the structure for this compound?

Q3) Provide a stepwise synthesis of 1-cyclopentylethanamine using the Gabriel synthesis.

Q4) What is the structure for 3-chloro-N-ethyl-1-pentanamine?

Q5) What is the structure for N-ethylbenzylamine?

Q6) The ________ reaction is used to prepare primary amines by using potassium phthalimide. This reaction proceeds by a ________ mechanism.

Q7) Provide a stepwise synthesis of 3-amino-2-methylpentane using the Gabriel synthesis.

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Chapter 23: Introduction to Organometallic Compounds

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Sample Questions

Q1) Which of the following compounds has the least nucleophilic carbon atom?

A) CH₃CH₂MgBr

B) CH₃CH₂MgI

C) (CH₃CH₂)₂Zn

D) (CH₃CH₂)₂Cu

Q2) Which of the following statements is false regarding the preparation of organolithium compounds?

A) Organolithium compounds can be made from alkyl halides (R-X).

B) Organolithium compounds can be made from aryl halides (Ar-X).

C) Vinyl halides cannot be used to form vinyl lithium reagents.

D) Lithium halides are byproducts of the reaction of lithium metal with alkyl halides.

E) It is necessary to use two equivalents of lithium metal.

Q3) Which of the following electrophiles are commonly used with Gilman reagents to form C-C bonds? Select all that apply.

A)acid chlorides

B) , -unsaturated ketones

C)esters

D)alkyl halides

E)amides

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Chapter 24: Carbohydrates

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Q1) Pyranose forms of monosaccharides are_____.

A) 5-membered cyclic hemiacetals

B) 6-membered cyclic acetals

C) 5-membered cyclic acetals

D) 6-membered cyclic hemiacetals

E) none of these

Q2) Identify the monomer in glycogen.

A) (\(\alpha\)-D-glucose)

B) (\(\beta\)-D-glucose)

C) (\(\alpha\)-D-galactose)

D) (\(\beta\)-D-fructose)

E) maltose

Q3) Identify the monosaccharide(s) in sucrose.

Q4) Plants convert carbon dioxide and water into glucose in the presence of sunlight via

A) hydrolysis

B) retrosynthesis

C) Killiani synthesis

D) photosynthesis

E) none of these

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Chapter 25: Amino Acids, Peptides, and Proteins

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133 Verified Questions

133 Flashcards

Source URL: https://quizplus.com/quiz/72943

Sample Questions

Q1) Provide the structure of the predominant form of alanine at pH 2?

Q2) Which one of the following amino acids contain a sulfur atom?

A) cysteine

B) serine

C) glutamine

D) leucine

E) proline

Q3) Which of the following peptides results after a single Edman degradation of the tetrapeptide Gly-Phe-Tyr-Ser?

A) Gly-Phe-Tyr

B) Tyr-Ser

C) Phe-Tyr-Ser

D) Gly-Phe

E) Ser

Q4) Which of the following tetrapeptides is not cleaved by chymotrypsin?

A) Gly-Lys-Cys-Trp

B) Cys-Tyr-Arg-Phe

C) Phe-Ser-Ile-Lys

D) Ala-Trp-Tyr-Arg

E) Phe-Met-Pro-Arg

Page 29

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Chapter 26: Lipids

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123 Verified Questions

123 Flashcards

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Sample Questions

Q1) List the components of lechithins and cephalins.

A) three polar head groups

B) two polar head groups and one nonpolar hydrophobic tail

C) one polar head group and two nonpolar hydrophobic tails

D) three nonpolar hydrophobic tails

Q2) Explain why fatty acids cannot form a bilayer.

Q3) Provide the structure of a cephalin that would produce two oleic acid residues on hydrolysis?

Q4) Sheep have ___________________ on their wool.

A) oil

B) lanolin

C) spermaceti

D) carnauba wax

E) beeswax

Q5) Which of the following is a correct description of waxes?

A) long chain esters

B) long chain ethers

C) long chain anhydrides

D) long chain fatty acids

E) long chain alcohols

30

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Chapter 27: Synthetic Polymers

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119 Verified Questions

119 Flashcards

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Sample Questions

Q1) Provide the structure of a region of an alternating copolymer constructed from propylene and acrylonitrile.

Q2) Identify the polymer that is used in bullet-proof vests.

A) Nylon 6

B) Teflon

C) Kevlar

D) Lexan

E) Nylon 6,6

Q3) Give the monomers to form PET.

Q4) Identify the type of addition that is used to form Superglue.

A) anionic

B) cationic

C) radical

D) condensation

E) elimination

Q5) Provide the structure of a region of the polymer that is produced when phosgene is treated with 3,3-dimethyl-1,5-pentanediol.

Q6) Provide the structure of a region of a block copolymer constructed from isobutylene and vinyl fluoride.

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