Domanda del libro di testo
Draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons for each of the following.
(a) [Cu(en)3]2+
(b) [FeF6]2-
(c) [Co(en)3]3+ (low spin)
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Ch.21 - Transition Elements and Coordination Chemistry
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Tutti i libri di testo
McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 21.114
McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 21.114Capitolo 21, Problema 21.114
Which of the following complexes are paramagnetic?
(a) [Mn(CN)6]3-
(b) [Zn(NH3)4]2+ (tetrahedral)
(c) [Fe(CN)6]4-
(d) [FeF6]4-
Guida verificata passo dopo passo1
Identify the oxidation state of the metal in each complex.
Determine the electron configuration of the metal ion in each complex.
Assess the ligand field strength: CN^- is a strong field ligand, NH_3 is a moderate field ligand, and F^- is a weak field ligand.
Apply crystal field theory to determine the electron distribution in the d-orbitals for each complex.
Identify if there are unpaired electrons in the d-orbitals, which would indicate paramagnetism.
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Concetti chiave
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Paramagnetism
Paramagnetism is a property of materials that have unpaired electrons, which causes them to be attracted to magnetic fields. In transition metal complexes, the presence of unpaired electrons in d-orbitals is a key factor in determining whether a complex is paramagnetic. The number of unpaired electrons can be influenced by the metal's oxidation state and the nature of the ligands surrounding it.
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Percorso guidato
01:33
Paramagnetism and Diamagnetism
Crystal Field Theory
Crystal Field Theory (CFT) explains how the arrangement of ligands around a central metal ion affects its electronic structure and properties. According to CFT, the interaction between the metal ion and the ligands leads to the splitting of d-orbitals into different energy levels. The extent of this splitting, influenced by the ligand's strength (strong field vs. weak field), determines the number of unpaired electrons and thus the magnetic properties of the complex.
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Percorso guidato
01:18The study of ligand-metal interactions helped to form Ligand Field Theory which combines CFT with MO Theory.
Oxidation States of Transition Metals
The oxidation state of a transition metal in a complex is crucial for determining its electronic configuration and magnetic properties. Different oxidation states can lead to varying numbers of d-electrons, which directly affect the number of unpaired electrons. Understanding the oxidation states of the metals in the given complexes is essential for predicting whether they will exhibit paramagnetism or not.
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Percorso guidato
03:12Transition Metals
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