Question

Identify the ligands and give the coordination number and the oxidation number for the central atom or ion in each of the following: (a) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{2}\left(\mathrm{NO}_{2}\right)_{4}\right]^{-}$, (b) $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}$ (c) $\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ (d) $\left[\mathrm{Pd}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$

Name: Problem 6, Chapter 25: Chemistry
Uploaded: 2021-10-17T05:06:53-08:00
Duration: 2 min 26 s
Channel: Aadit Sharma
Description: Identify the ligands and give the coordination number and the oxidation number for the central atom or ion in each of the following: (a) [Co(NH3)2(NO2)4]^-, (b) [Cr(NH3)5 Cl] Cl2 (c) K4[Fe(CN)6] (d) [Pd(NH3)4]^2+

   Identify the ligands and give the coordination number and the oxidation number for the central atom or ion in each of the following: (a) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{2}\left(\mathrm{NO}_{2}\right)_{4}\right]^{-}$,
(b) $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}$
(c) $\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(d) $\left[\mathrm{Pd}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$

Chemistry

Kenneth W. Whitten,… 9th Edition

Chapter 25, Problem 6

Instant Answer

Solved by Expert Aadit Sharma

10/17/2021

Step 1

Ligands are ions or molecules that bind to the central atom or ion in a coordination complex. In these complexes, the ligands are $\mathrm{NH}_{3}$ (ammonia), $\mathrm{NO}_{2}$ (nitrite), $\mathrm{Cl}$ (chloride), and $\mathrm{CN}$ (cyanide). Show more…

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Identify the ligands and give the coordination number and the oxidation number for the central atom or ion in each of the following: (a) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{2}\left(\mathrm{NO}_{2}\right)_{4}\right]^{-}$, (b) $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}$ (c) $\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ (d) $\left[\mathrm{Pd}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$

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Key Concepts

Oxidation Number

The oxidation number of the central atom in a complex is calculated by assigning formal charges to the ligands and using the overall charge of the complex to balance the charge of the metal. This concept is crucial for understanding the electron distribution within the complex and predicting its reactivity.

Coordination Number

The coordination number is defined as the number of ligand donor atoms directly bonded to the central atom in a coordination complex. It determines the spatial arrangement of the ligands around the metal center, thereby influencing the geometry and stereochemistry of the compound.

Ligands

Ligands are atoms, ions, or molecules that donate a pair of electrons to a central atom in a coordination complex through coordinate covalent bonds. They can be neutral or charged, and their bonding capabilities (such as being monodentate, bidentate, etc.) influence the geometry and stability of the complex.

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