Textbook Question
Determine whether the following pairs of structures are actually different compounds or simply resonance forms of the same compounds.
a.
b.
c.
d.
794
views
Ch.1 - Structure and Bonding
Wade9th EditionOrganic ChemistryISBN: 9780135213728
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 1, Problem 38g,h
Give the molecular formula of each compound shown
(g) 
(h) 
Verified step by step guidance1
Identify the structure of compound (g): It is a benzene ring with a methyl group (CH₃) and a sulfonic acid group (SO₃H) attached.
Determine the number of each type of atom in compound (g): The benzene ring contributes C₆H₅, the methyl group adds CH₃, and the sulfonic acid group adds SO₃H.
Combine the contributions from each part of compound (g) to find the molecular formula: Add the atoms from the benzene ring, methyl group, and sulfonic acid group.
Identify the structure of compound (h): It is a five-membered ring with two ketone groups (C=O) and a methoxy group (OCH₃) attached.
Determine the number of each type of atom in compound (h): Count the carbon, hydrogen, and oxygen atoms from the ring, ketone groups, and methoxy group, then combine them to find the molecular formula.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
4mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Skeletal Structure Interpretation
Skeletal structures are a shorthand representation of organic molecules where carbon atoms are implied at the junctions of lines and hydrogen atoms are omitted. Each line represents a bond, and heteroatoms like oxygen, nitrogen, and sulfur are explicitly shown. Understanding how to interpret these structures is crucial for determining the molecular formula of a compound.
Recommended video:
Guided course
06:06
How to interpret condensed structures.
Functional Groups Identification
Functional groups are specific groups of atoms within molecules that have characteristic properties and reactivity. In the given image, the sulfonic acid group (SO3H) and carbonyl groups (C=O) are key functional groups. Recognizing these groups helps in understanding the chemical behavior of the compounds and is essential for writing the correct molecular formula.
Recommended video:
Guided course
02:36Identifying Functional Groups
Molecular Formula Determination
The molecular formula of a compound indicates the number and type of atoms present. To determine it from a skeletal structure, count the carbon atoms at the vertices and ends of lines, add the appropriate number of hydrogen atoms to satisfy carbon's tetravalency, and include any heteroatoms. This process allows for the accurate representation of the compound's composition.
Recommended video:
Guided course
02:17How to use IHD with molecular formula.
Related Practice
Textbook Question
1. From what you remember of electronegativities, show the direction of the dipole moments of the following bonds.
2. In each case, predict whether the dipole moment is relatively large (electronegativity difference >0.5) or small.
a. C—Cl
b. C—H
c. C—Li
d. C—N
e. C—O
1179
views
Textbook Question
For each of the following structures,
1. Draw a Lewis structure; fill in any nonbonding electrons.
2. Calculate the formal charge on each atom other than hydrogen
d. [(CH3)3O]+
e. CH3NC
f. (CH3)4NBr
1728
views
Textbook Question
Give the molecular formula of each compound shown
(d)
(e)
(f)
1064
views
Textbook Question
Draw complete Lewis structures, including lone pairs, for the following compounds.
(g)
(h)
1399
views
Textbook Question
Give the molecular formula of each compound shown
(a)
(b)
(c)
1581
views