Exhibit 15-6 Consider the data below to answer the following question(s). CS1U1B19S1U1B0HS1U1B112S1U1B0;S1U1P11S1S1P0H NMR: 6.65 δ (singlet,3H) 2.25 δ (singlet,9H) -Refer to Exhibit 15-6.Propose a structure for this compound.

The answer of Exhibit 15-6 Consider the data below to answer...

Exhibit 15-7 Consider the data below to answer the following question(s). CS1U1B17S1U1B0HS1U1B17S1U1B0ClO;IR absorption at 810 cm−S1U1P11S1S1P0 Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Propose a structure for this compound.

The answer of Exhibit 15-7 Consider the data below to answer...

Exhibit 15-5 Consider the data below to answer the following question(s). CS1U1B19S1U1B0HS1U1B112S1U1B0;S1U1P11S1S1P0H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Propose a structure for this compound.

The answer of Exhibit 15-5 Consider the data below to answer...

Exhibit 15-7 Consider the data below to answer the following question(s). CS1U1B17S1U1B0HS1U1B17S1U1B0ClO;IR absorption at 810 cm−S1U1P11S1S1P0 Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Calculate the degrees of unsaturation for this compound.

The formula C 7 H 7 ClO corresponds

Exam 15: Benzene and Aromaticity

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Exhibit 15-3 Refer to the data below to answer the following question(s). The ¹H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Is [14]annulene aromatic?

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Question 1

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[14]annulene contains a cyclic,conjugated pi system with 14 pi electrons (14 = 4n + 2;n = 3).It is difficult to predict,however,if the molecule is planar without making a model.The ¹H NMR signal at 7.6 ppm is consistent with the presence of a ring current,which is characteristic of aromatic molecules.Thus,[14]annulene is aromatic.

Which of the following does not correctly characterize this compound represented by the molecular model shown below? Atoms other than carbon and hydrogen are labeled.

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Question 2

Correct Answer:

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Name:

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Question 3

Correct Answer:

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(E)-2,3-diphenyl-2-hexene

Draw a picture of the π orbitals in furan (shown below).Is furan aromatic?

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Question 4

Exhibit 15-6 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 6.65 δ (singlet,3H) 2.25 δ (singlet,9H) -Refer to Exhibit 15-6.Propose a structure for this compound.

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Question 5

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 7.18 δ in terms of its splitting,integration and chemical shift.

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Question 6

Exhibit 15-3 Refer to the data below to answer the following question(s). The ¹H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Explain why these protons have absorption at such high fields.

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Question 7

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Question 8

Explain in terms of MO theory,why systems with 4n + 2 π electrons are aromatic and with 4n π electrons are antiaromatic.

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Question 9

Draw the different resonance forms of anthracene.

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Question 10

Draw: m-fluoronitrobenzene

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Question 11

Exhibit 15-3 Refer to the data below to answer the following question(s). The ¹H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Draw in the protons on the [14]annulene skeleton provided below which are responsible for the ¹H NMR signal at 0 ppm.

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Question 12

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Propose a structure for this compound.

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Question 13

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Propose a structure for this compound.

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Question 14

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Calculate the degrees of unsaturation for this compound.

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Question 15

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Describe the signal at 3.7 δ in terms of its splitting,integration and chemical shift.

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Question 16

Draw: 1-phenyl-3-methylpentane

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Question 17

Draw the resonance forms of indene.

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Question 18

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 2.55 δ in terms of its splitting,integration,and chemical shift.

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Question 19

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Question 20

Showing 1 - 20 of 47

Exam 15: Benzene and Aromaticity

Exhibit 15-3 Refer to the data below to answer the following question(s). The 1H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Is [14]annulene aromatic?

Which of the following does not correctly characterize this compound represented by the molecular model shown below? Atoms other than carbon and hydrogen are labeled. ​

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Draw a picture of the π orbitals in furan (shown below).Is furan aromatic?

Exhibit 15-6 Consider the data below to answer the following question(s). C9H12;1H NMR: 6.65 δ (singlet,3H) 2.25 δ (singlet,9H) -Refer to Exhibit 15-6.Propose a structure for this compound.

Exhibit 15-5 Consider the data below to answer the following question(s). C9H12;1H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 7.18 δ in terms of its splitting,integration and chemical shift.

Exhibit 15-3 Refer to the data below to answer the following question(s). The 1H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Explain why these protons have absorption at such high fields.

Name:

Explain in terms of MO theory,why systems with 4n + 2 π electrons are aromatic and with 4n π electrons are antiaromatic.

​Draw the different resonance forms of anthracene.

Draw: m-fluoronitrobenzene

Exhibit 15-7 Consider the data below to answer the following question(s). C7H7ClO;IR absorption at 810 cm−1 Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Propose a structure for this compound.

Exhibit 15-5 Consider the data below to answer the following question(s). C9H12;1H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Propose a structure for this compound.

Exhibit 15-7 Consider the data below to answer the following question(s). C7H7ClO;IR absorption at 810 cm−1 Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Calculate the degrees of unsaturation for this compound.

Exhibit 15-7 Consider the data below to answer the following question(s). C7H7ClO;IR absorption at 810 cm−1 Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Describe the signal at 3.7 δ in terms of its splitting,integration and chemical shift.

Draw: 1-phenyl-3-methylpentane

​Draw the resonance forms of indene.

Exhibit 15-5 Consider the data below to answer the following question(s). C9H12;1H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 2.55 δ in terms of its splitting,integration,and chemical shift.

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Structure and Bonding

Polar Covalent Bonds;acids and Bases

Organic Compounds: Alkanes and Their Stereochemistry

Organic Compounds: Cycloalkanes and Their Stereochemistry

Stereochemistry at Tetrahedral Centers

An Overview of Organic Reactions

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Alkenes: Structure and Reactivity

Alkenes: Reactions and Synthesis

Alkynes: an Introduction to Organic Synthesis

Organohalides

Reactions of Alkyl Halides: Nucleophilic Substitutions and Eliminations

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Structure Determination: Mass Spectrometry and Infrared Spectroscopy

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Conjugated Compounds and Ultraviolet Spectroscopy

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Chemistry of Benzene: Electrophilic Aromatic Substitution

Alcohols and Phenols

Ethers and Epoxides;thiols and Sulfides

Aldehydes and Ketones: Nucleophilic Addition Reactions

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Carboxylic Acids and Nitriles

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Amines and Heterocycles

Biomolecules: Carbohydrates

Biomolecules: Amino Acids,peptides,and Proteins

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Biomolecules: Lipids

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The Organic Chemistry of Metabolic Pathways

Orbitals and Organic Chemistry: Pericyclic Reactions

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Exhibit 15-3 Refer to the data below to answer the following question(s). The ¹H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Is [14]annulene aromatic?

Which of the following does not correctly characterize this compound represented by the molecular model shown below? Atoms other than carbon and hydrogen are labeled.

Exhibit 15-6 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 6.65 δ (singlet,3H) 2.25 δ (singlet,9H) -Refer to Exhibit 15-6.Propose a structure for this compound.

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 7.18 δ in terms of its splitting,integration and chemical shift.

Exhibit 15-3 Refer to the data below to answer the following question(s). The ¹H NMR spectrum of [14]annulene at −60°C shows two signals,one at 0 ppm and one at 7.6 ppm,with an area ratio of 5:2. -Refer to Exhibit 15-3.Explain why these protons have absorption at such high fields.

Draw the different resonance forms of anthracene.

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Propose a structure for this compound.

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Propose a structure for this compound.

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Calculate the degrees of unsaturation for this compound.

Exhibit 15-7 Consider the data below to answer the following question(s). C₇H₇ClO;IR absorption at 810 cm−¹ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -Refer to Exhibit 15-7.Describe the signal at 3.7 δ in terms of its splitting,integration and chemical shift.

Draw the resonance forms of indene.

Exhibit 15-5 Consider the data below to answer the following question(s). C₉H₁₂;¹H NMR: 7.18 δ (broad singlet,5H) 2.55 δ (triplet,2H) 1.70 δ (sextet,2H) 0.9 δ (triplet,3H) -Refer to Exhibit 15-5.Describe the signal at 2.55 δ in terms of its splitting,integration,and chemical shift.