Question 1

How many chemically distinct hydrogen atoms are in the following molecule?

Accepted Answer

The answer of How many chemically distinct hydrogen atoms are...

Question 2

Which hydrogen type has the smallest integration value?

Accepted Answer

A) HA 
B) HB 
C) HC 
D) HD 
E) HE 
A) HA 
B) HB 
C) HC 
D) HD 
E) HE

Question 3

Give the expected splitting patterns for HA,HB,HC,and HD.

Accepted Answer

H_A: singlet

Question 4

Which hydrogen atom has the greatest chemical shift?

Accepted Answer

A) HA 
B) HB 
C) HC 
D) HD 
E) HE 
A) HA 
B) HB 
C) HC 
D) HD 
E) HE

Question 5

How many distinct signals are in the 13C NMR of the following compound?

Accepted Answer

A) Four 
B) Five 
C) Six 
D) Seven 
E) Eight 
A) Four 
B) Five 
C) Six 
D) Seven 
E) Eight

Question 6

Which proton in the following molecule has the greatest chemical shift?

Accepted Answer

The answer of Which proton in the following molecule has...

Question 7

Which of the following molecules would have a singlet at 2.1 ppm?

Accepted Answer

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

Question 8

Which compound would produce the 1H NMR spectrum below?

Accepted Answer

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

Question 9

How many chemically distinct hydrogen atoms are in the following molecule?

Accepted Answer

The answer of How many chemically distinct hydrogen atoms are...

Question 10

The mass spectrum for an unknown molecule has an M+ peak with a relative intensity of 12.5 and an M + 1 peak with a relative intensity of 2.48.How many carbons are in the unknown molecule?

Accepted Answer

Question 11

Which type of atom is likely present in the molecule responsible for the following mass spectrum?

Accepted Answer

A) N 
B) F 
C) Cl 
D) Br 
E) I 
A) N 
B) F 
C) Cl 
D) Br 
E) I

Question 12

Explain how coupling constants can be used to determine whether an NMR spectrum represents compound A or compound B.

Accepted Answer

The hydrogens in compound A are coupled

Question 13

Which of the following is the base peak?

Accepted Answer

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

Question 14

For the following molecule,give the splitting patterns for HA,HB,and HC.

Accepted Answer

H_A,H_B,and H_C

Question 15

Explain how you can use a mass spectrum to determine if a single nitrogen is present in a molecule.

Accepted Answer

If a single nitrogen

Question 16

What apparent splitting pattern would not be found in the 1H NMR spectrum or the following molecule?

Accepted Answer

A) Singlet 
B) Doublet 
C) Triplet 
D) Quartet 
E) Quintet 
A) Singlet 
B) Doublet 
C) Triplet 
D) Quartet 
E) Quintet

Question 17

Draw a splitting diagram for HA and indicate the expected splitting pattern.

Accepted Answer

H_A is a dou

Question 18

Which m/z value would indicate that nitrogen was present in a sample?

Accepted Answer

A) m / z F1F1F1S1F1F1F1013 
B) m / z F1F1F1S1F1F1F10 100 
C) m / z F1F1F1S1F1F1F10 104 
D) m / z F1F1F1S1F1F1F10 150 
E) m / z F1F1F1S1F1F1F10 155 
A) m / z F1F1F1S1F1F1F1013 
B) m / z F1F1F1S1F1F1F10 100 
C) m / z F1F1F1S1F1F1F10 104 
D) m / z F1F1F1S1F1F1F10 150 
E) m / z F1F1F1S1F1F1F10 155

Question 19

Which hydrogen in the following molecule has the greatest integration value?

Accepted Answer

The answer of Which hydrogen in the following molecule has...

Question 20

How many chemically distinct hydrogen atoms are in the following molecule?

Accepted Answer

A) Four types 
B) Five types 
C) Six types 
D) Seven types 
E) Eight types 
A) Four types 
B) Five types 
C) Six types 
D) Seven types 
E) Eight types

Exam 18: Structure Determination 2: Nuclear Magnetic Resonance Spectroscopy and Mass Spectrometry

How many chemically distinct hydrogen atoms are in the following molecule?

Which hydrogen type has the smallest integration value?

Give the expected splitting patterns for HA,HB,HC,and HD.

Which hydrogen atom has the greatest chemical shift?

How many distinct signals are in the 13C NMR of the following compound?

Which proton in the following molecule has the greatest chemical shift?

Which of the following molecules would have a singlet at 2.1 ppm?

Which compound would produce the 1H NMR spectrum below?

How many chemically distinct hydrogen atoms are in the following molecule?

The mass spectrum for an unknown molecule has an M+ peak with a relative intensity of 12.5 and an M + 1 peak with a relative intensity of 2.48.How many carbons are in the unknown molecule?

Which type of atom is likely present in the molecule responsible for the following mass spectrum?

Explain how coupling constants can be used to determine whether an NMR spectrum represents compound A or compound B.

Which of the following is the base peak?

For the following molecule,give the splitting patterns for HA,HB,and HC.

Explain how you can use a mass spectrum to determine if a single nitrogen is present in a molecule.

What apparent splitting pattern would not be found in the 1H NMR spectrum or the following molecule?

Draw a splitting diagram for HA and indicate the expected splitting pattern.

Which m/z value would indicate that nitrogen was present in a sample?

Which hydrogen in the following molecule has the greatest integration value?

How many chemically distinct hydrogen atoms are in the following molecule?

Atomic and Molecular Structure

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

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

Filters

Give the expected splitting patterns for H_A,H_B,H_C,and H_D.

How many distinct signals are in the ¹³C NMR of the following compound?

Which compound would produce the ¹H NMR spectrum below?

The mass spectrum for an unknown molecule has an M⁺ peak with a relative intensity of 12.5 and an M + 1 peak with a relative intensity of 2.48.How many carbons are in the unknown molecule?

For the following molecule,give the splitting patterns for H_A,H_B,and H_C.

What apparent splitting pattern would not be found in the ¹H NMR spectrum or the following molecule?

Draw a splitting diagram for H_A and indicate the expected splitting pattern.