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Ch.21 - Transition Elements and Coordination Chemistry
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMcMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 75
Capitolo 21, Problema 75

Identify the Lewis acid and the Lewis base in the reaction of oxalate ions (C2O42-) with Fe3+ to form [Fe(C2O4)3]3-. (a) Identify the ligands and donor atoms. (b) Give the coordination number and geometry of the metal in the complex.

Guida verificata passo dopo passo
1
Step 1: Understand the concept of Lewis acids and bases. A Lewis acid is a species that can accept an electron pair, while a Lewis base is a species that can donate an electron pair.
Step 2: Identify the Lewis acid and base in the reaction. In the given reaction, Fe^{3+} is the Lewis acid because it can accept electron pairs, and C_2O_4^{2-} (oxalate ion) is the Lewis base because it can donate electron pairs.
Step 3: Identify the ligands and donor atoms. In the complex [Fe(C_2O_4)_3]^{3-}, the oxalate ion acts as a bidentate ligand, meaning it can form two bonds with the metal ion. The donor atoms in the oxalate ion are the two oxygen atoms that coordinate with the Fe^{3+}.
Step 4: Determine the coordination number of the metal. The coordination number is the number of ligand donor atoms bonded to the central metal ion. Since each oxalate ion forms two bonds and there are three oxalate ions, the coordination number of Fe^{3+} is 6.
Step 5: Identify the geometry of the metal complex. With a coordination number of 6, the geometry of the complex is typically octahedral. Therefore, the geometry of [Fe(C_2O_4)_3]^{3-} is octahedral.

Concetti chiave

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Lewis Acids and Bases

Lewis acids are species that can accept an electron pair, while Lewis bases are those that can donate an electron pair. In the reaction between oxalate ions (C2O4^2-) and Fe3+, the oxalate acts as a Lewis base by donating electron pairs to the metal ion, Fe3+, which functions as a Lewis acid by accepting these pairs.
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05:04
Lewis Acids and Bases

Coordination Complexes

Coordination complexes consist of a central metal atom or ion bonded to surrounding molecules or ions called ligands. In this case, the oxalate ions serve as bidentate ligands, meaning they can attach to the metal at two sites, forming a stable complex with the metal ion.
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00:43
Coordination Complexes Example

Coordination Number and Geometry

The coordination number refers to the number of ligand donor atoms that are bonded to the central metal ion. In the complex [Fe(C2O4)3]3-, the coordination number is 6, as each oxalate ligand donates two pairs of electrons, leading to an octahedral geometry around the Fe3+ ion.
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00:51
Coordination Numbers and Geometry Example
Pratica correlata
Domanda del libro di testo

What is the systematic name for each of the following coordination compounds? 

(c) K3[Fe(C2O4)3]

(d) [Co(en)2(NH3)CN]Cl2

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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?

(a) Pt(en)2

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Draw the structure of the following complexes. What are the oxidation state, coordination number, and coordination geometry of the metal in each?

(b) [Co(H2O)5Cl]SO4]

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Domanda del libro di testo

What is the systematic name for each of the following coordination compounds? 

(a) [Cu(NH3)4]SO4

(b) Cr(CO)6

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Domanda del libro di testo

(a) Identify the Lewis acid and the Lewis base in the reaction of ethylenediamine (H2NCH2CH2NH2) with Ni2+ to form [Ni(en)3]2+.

(b) Identify the ligands and donor atoms.

(c) Give the coordination number and geometry of the metal in the complex.

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