Domanda del libro di testo
Draw the structure of the following complexes. What are the oxidation state, coordination number, and coordination geometry of the metal in each?
(b) [Cr(NH3)2(C2O4)2]NO2
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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
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McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 72a
McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 72aCapitolo 21, Problema 72a
Draw the structure of the following complexes. What are the oxidation state, coordination number, and coordination geometry of the metal in each?
(a) Na[Au(CN)2]
Guida verificata passo dopo passo1
Step 1: Identify the components of the complex Na[Au(CN)_2]. The complex consists of a sodium ion (Na^+) and a complex ion [Au(CN)_2]^-.
Step 2: Determine the oxidation state of the metal. The cyanide ion (CN^-) has a charge of -1. Since there are two cyanide ions, their total charge is -2. The sodium ion (Na^+) balances the charge of the complex ion, so the charge on the complex ion [Au(CN)_2]^- is -1. Therefore, the oxidation state of gold (Au) is +1.
Step 3: Determine the coordination number of the metal. The coordination number is the number of ligand donor atoms bonded to the metal. In [Au(CN)_2]^-, there are two cyanide ligands, so the coordination number of Au is 2.
Step 4: Determine the coordination geometry of the metal. With a coordination number of 2, the geometry is typically linear. Therefore, the coordination geometry around Au in [Au(CN)_2]^- is linear.
Step 5: Draw the structure of the complex. The structure of [Au(CN)_2]^- is linear with Au in the center and CN groups on either side: CN-Au-CN. The sodium ion (Na^+) is not part of the coordination sphere but balances the charge of the complex.
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Concetti chiave
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Oxidation State
The oxidation state of an element in a compound indicates the degree of oxidation of that element, reflecting the number of electrons lost or gained. In coordination complexes, the oxidation state of the metal can be determined by considering the charges of the ligands and the overall charge of the complex. For example, in Na[Au(CN)2], the cyanide ion (CN-) has a -1 charge, which helps in calculating the oxidation state of gold (Au).
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02:42
Oxidation Numbers
Coordination Number
The coordination number refers to the number of ligand atoms that are directly bonded to the central metal atom in a coordination complex. It is crucial for understanding the structure and stability of the complex. In the case of Na[Au(CN)2], the coordination number is 2, as there are two cyanide ligands coordinating to the gold atom.
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Percorso guidato
00:27Coordination Numbers
Coordination Geometry
Coordination geometry describes the spatial arrangement of the ligands around the central metal atom in a coordination complex. This geometry is influenced by the coordination number and the steric and electronic properties of the ligands. For Na[Au(CN)2], with a coordination number of 2, the geometry is linear, which is typical for complexes with two ligands.
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02:40Molecular Geometry of Coordination Complexes
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