Domanda del libro di testo
(b) An AB4 molecule has two lone pairs of electrons on the A atom (in addition to the four B atoms). What is the electron-domain geometry around the A atom?
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Ch.9 - Molecular Geometry and Bonding Theories
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 9, Problema 19
In which of these molecules or ions does the presence of nonbonding electron pairs produce an effect on the molecular shape? (a) CO2, (b) CH2Br2, (c) OF2, (d) BCl3, (e) SF6.
Guida verificata passo dopo passo1
Step 1: Understand the concept of molecular shape and the role of nonbonding electron pairs. Nonbonding electron pairs, also known as lone pairs, can influence the geometry of a molecule by repelling bonding pairs of electrons, which can alter the molecular shape.
Step 2: Analyze each molecule or ion to determine the presence of nonbonding electron pairs on the central atom. Use the Lewis structure to identify lone pairs.
Step 3: For each molecule or ion, apply the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the molecular shape. VSEPR theory states that electron pairs around a central atom will arrange themselves to minimize repulsion, affecting the shape.
Step 4: Evaluate the effect of any nonbonding electron pairs on the molecular shape. Nonbonding pairs exert greater repulsive force than bonding pairs, potentially altering the expected geometry.
Step 5: Identify which molecules or ions have their molecular shape affected by nonbonding electron pairs based on your analysis.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
VSEPR Theory
Valence Shell Electron Pair Repulsion (VSEPR) Theory is a model used to predict the geometry of individual molecules based on the repulsion between electron pairs in the valence shell of the central atom. According to this theory, electron pairs, whether bonding or nonbonding, will arrange themselves to minimize repulsion, thus influencing the overall shape of the molecule.
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Percorso guidato
02:13
Molecular Shapes and VSEPR
Nonbonding Electron Pairs
Nonbonding electron pairs, also known as lone pairs, are pairs of valence electrons that are not involved in bonding with other atoms. These lone pairs occupy space around the central atom and can significantly affect molecular geometry by repelling bonding pairs, leading to distortions in the expected shape of the molecule.
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Percorso guidato
00:47Valence Shell Electron Pair Repulsion Theory
Molecular Geometry
Molecular geometry refers to the three-dimensional arrangement of atoms within a molecule. It is determined by the number of bonding pairs and lone pairs around the central atom, which influences bond angles and overall shape. Understanding molecular geometry is crucial for predicting the physical and chemical properties of substances.
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Percorso guidato
01:33Molecular Geometry with Two Electron Groups
Pratica correlata
Domanda del libro di testo
(a) An AB6 molecule has no lone pairs of electrons on the A atom. What is its molecular geometry? (c) For the AB4 molecule in part (b), predict the molecular geometry.
Domanda del libro di testo
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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Domanda del libro di testo
Would you expect the nonbonding electron-pair domain in NCl3 to be greater or smaller in size than the corresponding one in PCl3?
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Domanda del libro di testo
How many nonbonding electron pairs are there in each of the following molecules: (a) (CH3)2S (c) BF3 (d) SO2
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Domanda del libro di testo
How many nonbonding electron pairs are there in each of the following molecules: (b) HCN
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