Name the following coordination compounds. a. [Cr(H2 O)5 Br] Br2 b. Na3[Co(CN)6] c. [Fe(NH2 CH2

step 1 Now here the question is name the following coordination compounds. So when you are naming a com

Name the following coordination compounds. a. [Cr(H2 O)5 Br]...

Name the following coordination compounds. a. $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{Br}_{2}$ b. $\mathrm{Na}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$ c. $\left[\mathrm{Fe}\left(\mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)_{2}\left(\mathrm{NO}_{2}\right)_{2}\right] \mathrm{Cl}$ d. $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{I}_{2}\right]\left[\mathrm{PtI}_{4}\right]$

Name the following coordination compounds.
a. $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{Br}_{2}$
b. $\mathrm{Na}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$
c. $\left[\mathrm{Fe}\left(\mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)_{2}\left(\mathrm{NO}_{2}\right)_{2}\right] \mathrm{Cl}$
d. $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{I}_{2}\right]\left[\mathrm{PtI}_{4}\right]$

Key Concepts

Oxidation State Determination

Determining the oxidation state of the central metal is key in coordination chemistry, as it influences the naming of the metal in the complex. The oxidation state is often indicated in parentheses in Roman numerals and ensures correct representation of the metal's electron configuration within the compound.

Coordination Sphere Identification

Identifying which atoms or groups form the coordination sphere—the central metal ion and its directly bonded ligands—is essential. This distinction helps in separating the coordination complex from its counter ions, which are named separately, and is fundamental in applying proper nomenclature.

Ligand Nomenclature

Naming the ligands attached to the central metal using standard nomenclature (such as 'aqua' for water, 'ammine' for ammonia, and appropriate names for anionic ligands) is crucial. The naming rules include using prefixes (like di-, tri-, tetra-) to indicate the number of identical ligands and modifying the ligand names according to their charge and binding characteristics.

Order of Naming

The proper naming order in coordination compounds requires listing the ligands in alphabetical order before naming the central metal ion. This systematic arrangement ensures consistency and clarity in the naming process according to IUPAC conventions.

Ambidentate Ligands

Some ligands are ambidentate, meaning they can attach to the central metal through more than one atom. It is important to specify the donor atom (for example, using designations like '-N' or '-O') in the ligand's name to avoid ambiguity and precisely indicate the bonding mode.

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