Question 1

Using line structures,deduce individual resonance contributors from the resonance hybrid structure given here.

Accepted Answer

The answer of Using line structures,deduce individual resonance contributors from...

Question 2

Draw all possible resonance forms for anisole using appropriate arrow notation.Which resonance structure is most stable? Least stable? Draw the resonance hybrid for anisole,indicating all partial charges.

Accepted Answer

The neutral structure is most stable.The

Question 3

Oxygen is an important heteroatom found in many organic molecules.Consider methanol and its protonated derivative,shown below.Indicate relevant bond dipoles using dipole arrows.How does an oxygen with a positive charge,called an oxonium species,influence the magnitude of the partial positive charge on the carbon atom? Which oxygen-carbon bond do you think is more difficult to break? Explain.

Accepted Answer

The C-O bond in the oxonium sp

Question 4

Using line structures,draw the individual resonance contributors from the resonance hybrid structure given here.

Accepted Answer

The answer of Using line structures,draw the individual resonance contributors...

Question 5

Which individual structures below could be contributing resonance structures to the given hybrid structure?

Accepted Answer

A) All are contributing structures. 
B) All but V are contributing structures. 
C) I, II, and III are contributing structures. 
D) I, III, and IV are contributing structures. 
E) Only I and III are contributing structures. 
A) All are contributing structures. 
B) All but V are contributing structures. 
C) I, II, and III are contributing structures. 
D) I, III, and IV are contributing structures. 
E) Only I and III are contributing structures.

Question 6

Which carbon atom has an oxidation state of +3?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 7

Which line structure is correct for Molecule Z?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 8

What is the molecular formula of this compound?

Accepted Answer

A) C6H12NO2 
B) C5H12NO2 
C) C5H11NO2 
D) C6H11NO2 
E) C6H13NO2 
A) C6H12NO2 
B) C5H12NO2 
C) C5H11NO2 
D) C6H11NO2 
E) C6H13NO2

Question 9

Which condensed formula contains a carboxylic acid?

Accepted Answer

A) CH3COCH3 
B) CH3CO2CH2CH3 
C) CH3CH2CH2COOH 
D) CH3CH2OH 
E) CH3COH 
A) CH3COCH3 
B) CH3CO2CH2CH3 
C) CH3CH2CH2COOH 
D) CH3CH2OH 
E) CH3COH

Question 10

Peptide bonds are the building blocks of proteins.Consider a peptide bond formed from the amino acids alanine and serine,shown below.Draw the resonance forms and the resonance hybrid for the amide bond of the dipeptide.Use appropriate arrow notation.

Accepted Answer

The answer of Peptide bonds are the building blocks of...

Question 11

Which of the following F1F1F1S1F1F1F10amino acids possesses two hydrogen atoms adjacent to the carboxylic acid?

Accepted Answer

A) Serine 
B) Phenylalanine 
C) Glycine 
D) Tryptophan 
E) Lysine 
A) Serine 
B) Phenylalanine 
C) Glycine 
D) Tryptophan 
E) Lysine

Question 12

Which orbital does not house core electrons for a bromine atom?

Accepted Answer

A) 1s 
B) 4p 
C) 3p 
D) 2s 
E) 3s 
A) 1s 
B) 4p 
C) 3p 
D) 2s 
E) 3s

Question 13

Identify the molecules below as monosaccharides,disaccharides,or carbohydrates.Explain the distinction between these classes of biologically active organic molecules.

Accepted Answer

Carbohydrates generally have the formula

Question 14

Which electron configuration is correct for a carbon atom with a formal charge of -1?

Accepted Answer

A) 1s22s22p63s1 
B) 1s22s22p3 
C) 1s22s22p5 
D) 1s22s22p63s23p5 
E) 1s22s22p4 
A) 1s22s22p63s1 
B) 1s22s22p3 
C) 1s22s22p5 
D) 1s22s22p63s23p5 
E) 1s22s22p4

Exam 1: Atomic and Molecular Structure

Using line structures,deduce individual resonance contributors from the resonance hybrid structure given here.

Draw all possible resonance forms for anisole using appropriate arrow notation.Which resonance structure is most stable? Least stable? Draw the resonance hybrid for anisole,indicating all partial charges.

Using line structures,draw the individual resonance contributors from the resonance hybrid structure given here.

Which individual structures below could be contributing resonance structures to the given hybrid structure?

Which carbon atom has an oxidation state of +3?

Which line structure is correct for Molecule Z?

What is the molecular formula of this compound?

Which condensed formula contains a carboxylic acid?

Peptide bonds are the building blocks of proteins.Consider a peptide bond formed from the amino acids alanine and serine,shown below.Draw the resonance forms and the resonance hybrid for the amide bond of the dipeptide.Use appropriate arrow notation.

Which of the following amino acids possesses two hydrogen atoms adjacent to the carboxylic acid?

Which orbital does not house core electrons for a bromine atom?

Identify the molecules below as monosaccharides,disaccharides,or carbohydrates.Explain the distinction between these classes of biologically active organic molecules.

Which electron configuration is correct for a carbon atom with a formal charge of -1?

Interchapter: Nomenclature 1-4

Interchapter 1molecular Orbital Theory and Chemical Reactions

Three-Dimensional Geometry,intermolecular Interactions,and Physical Properties

Orbital Interactions 1: Hybridization and Two-Center Molecular Orbitals

Isomerism 1: Conformational and Constitutional Isomers

Isomerism 2: Chirality,enantiomers,and Diastereomers

The Proton Transfer Reaction: an Introduction to Mechanisms,thermodynamics,and Charge Stability

An Overview of the Most Common Elementary Steps

An Introduction to Multistep Mechanisms: Sn1 and E1 Reactions

Nucleophilic Substitution and Elimination Reactions 1: Competition Among Sn2,sn1,e2,and E1 Reactions

Nucleophilic Substitution and Elimination Reactions 2: Reactions That Are Useful for Synthesis

Electrophilic Addition to Nonpolar Π Bonds 1: Addition of a Brønsted Acid

Electrophilic Addition to Nonpolar Π Bonds 2: Reactions Involving Cyclic Transition States

Organic Synthesis 1: Beginning Concepts

Orbital Interactions 2: Extended Π Systems,conjugation,and Aromaticity

Structure Determination 1: Ultravioletvisible and Infrared Spectroscopies

Structure Determination 2: Nuclear Magnetic Resonance Spectroscopy and Mass Spectrometry

Nucleophilic Addition to Polar Π Bonds 1: Addition of Strong Nucleophiles

Nucleophilic Addition to Polar Π Bonds 2: Addition of Weak Nucleophiles and Acid and Base Catalysis

Organic Synthesis 2: Intermediate Topics in Synthesis Design,and Useful Reduction and Oxidation Reactions

Nucleophilic Additionelimination Reactions 1: the General Mechanism Involving Strong Nucleophiles

Nucleophilic Additionelimination Reactions 2: Weak Nucleophiles

Electrophilic Aromatic Substitution 1: Substitution on Benzene; Useful Accompanying Reactions

Electrophilic Aromatic Substitution 2: Substitution on Mono- and Disubstituted Benzene and Other Aromatic Rings

The Dielsalder Reaction and Other Pericyclic Reactions

Reactions Involving Free Radicals

Polymers

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