Textbook Question
Give the electron-domain and molecular geometries for the following molecules and ions: (a) BeF2
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Ch.9 - Molecular Geometry and Bonding Theories
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement140
- Ch.2 - Atoms, Molecules, and Ions192
- Ch.3 - Chemical Reactions and Reaction Stoichiometry172
- Ch.4 - Reactions in Aqueous Solution156
- Ch.5 - Thermochemistry151
- Ch.6 - Electronic Structure of Atoms137
- Ch.7 - Periodic Properties of the Elements127
- Ch.8 - Basic Concepts of Chemical Bonding143
- Ch.9 - Molecular Geometry and Bonding Theories167
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces97
- Ch.12 - Solids and Modern Materials129
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics175
- Ch.15 - Chemical Equilibrium107
- Ch.16 - Acid-Base Equilibria127
- Ch.17 - Additional Aspects of Aqueous Equilibria133
- Ch.18 - Chemistry of the Environment88
- Ch.19 - Chemical Thermodynamics140
- Ch.20 - Electrochemistry137
- Ch.21 - Nuclear Chemistry99
- Ch.22 - Chemistry of the Nonmetals66
- Ch.23 - Transition Metals and Coordination Chemistry69
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry11
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook
Chapter 9, Problem 23
Give the electron-domain and molecular geometries of a molecule that has the following electron domains on its central atom: (a) four bonding domains and no nonbonding domains (b) three bonding domains and two nonbonding domains (c) five bonding domains and one nonbonding domain (d) four bonding domains and two nonbonding domains.
Verified step by step guidance1
Step 1: Understand the concept of electron-domain geometry and molecular geometry. Electron-domain geometry considers all electron domains (bonding and nonbonding) around the central atom, while molecular geometry considers only the arrangement of bonded atoms.
Step 2: For (a), identify the electron-domain geometry for a central atom with four bonding domains and no nonbonding domains. Use VSEPR theory to determine the shape.
Step 3: For (b), identify the electron-domain geometry for a central atom with three bonding domains and two nonbonding domains. Use VSEPR theory to determine the shape and consider how nonbonding domains affect the molecular geometry.
Step 4: For (c), identify the electron-domain geometry for a central atom with five bonding domains and one nonbonding domain. Use VSEPR theory to determine the shape and consider the effect of the nonbonding domain on the molecular geometry.
Step 5: For (d), identify the electron-domain geometry for a central atom with four bonding domains and two nonbonding domains. Use VSEPR theory to determine the shape and consider how the two nonbonding domains affect the molecular geometry.
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Electron-Domain Geometry
Electron-domain geometry refers to the spatial arrangement of all electron domains (bonding and nonbonding) around a central atom in a molecule. It is determined by the number of electron domains, which can include single bonds, double bonds, triple bonds, and lone pairs. The geometry helps predict the overall shape of the molecule based on the repulsion between these electron domains.
Molecular Geometry
Molecular geometry describes the three-dimensional arrangement of the atoms in a molecule, considering only the positions of the nuclei of the atoms. It is influenced by the electron-domain geometry but focuses solely on the bonding pairs of electrons. Different arrangements of bonding pairs lead to distinct molecular shapes, such as tetrahedral, trigonal planar, or octahedral.
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Molecular Geometry with Two Electron Groups
VSEPR Theory
Valence Shell Electron Pair Repulsion (VSEPR) theory is a model used to predict the geometry of molecules based on the repulsion between electron pairs surrounding a central atom. According to VSEPR, electron pairs will arrange themselves to minimize repulsion, leading to specific geometries. This theory is essential for determining both electron-domain and molecular geometries based on the number of bonding and nonbonding domains.
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Related Practice
Textbook Question
The figure that follows contains ball-and-stick drawings of three possible shapes of an AF4 molecule. (a) For each shape, give the electron-domain geometry on which the molecular geometry is based. i.
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Textbook Question
How many electron domains are surrounding the central atoms which adopt the following geometries? (d) trigonal bipyramidal.
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Textbook Question
The figure that follows contains ball-and-stick drawings of three possible shapes of an AF4 molecule. (a) For each shape, give the electron-domain geometry on which the molecular geometry is based. ii.
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Textbook Question
How many nonbonding electron pairs are there in each of the following molecules: (a) (CH3)2S (c) BF3 (d) SO2
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Textbook Question
How many nonbonding electron pairs are there in each of the following molecules: (b) HCN
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