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 22
How many electron domains are surrounding the central atoms which adopt the following geometries? (d) trigonal bipyramidal.
Verified step by step guidance1
Identify the geometry mentioned in the problem, which is trigonal bipyramidal.
Understand that electron domains include lone pairs and bonds (single, double, or triple) around the central atom.
Recognize that in a trigonal bipyramidal geometry, there are no lone pairs on the central atom, and all electron domains are bonding pairs.
Count the positions in the trigonal bipyramidal structure: there are three equatorial positions and two axial positions.
Conclude that there are five electron domains (all bonding pairs) around the central atom in a trigonal bipyramidal geometry.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Electron Domains
Electron domains refer to regions around a central atom where electrons are likely to be found. These can include lone pairs, single bonds, double bonds, or triple bonds. The number of electron domains helps determine the molecular geometry of a compound, as each domain occupies space and influences the arrangement of other domains.
Trigonal Bipyramidal Geometry
Trigonal bipyramidal geometry occurs when a central atom is surrounded by five electron domains. In this arrangement, three domains are positioned in a plane around the central atom, forming a triangle, while the other two are located above and below this plane. This geometry is characteristic of molecules with five bonding pairs and no lone pairs, such as phosphorus pentachloride (PCl5).
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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. According to VSEPR, electron domains will arrange themselves as far apart as possible to minimize repulsion, leading to specific molecular shapes. Understanding VSEPR is essential for determining the geometry associated with different numbers of electron domains.
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Related Practice
Textbook Question
In which of the following molecules can you confidently predict the bond angles about the central atom, and for which would you be a bit uncertain? Explain in each case. (a) H2S, (b) BCl3, (c) CH3I, (d) CBr4, (e) TeBr4.
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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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