Name the following coordination compounds. a. Na4[Ni(C2 O4)3] b. K2[CoCl4] c. [Cu(NH3)4] SO4 d.

Name the following coordination compounds. a. Na4[Ni(C2...

Name the following coordination compounds. a. $\mathrm{Na}_{4}\left[\mathrm{Ni}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]$ b. $\mathrm{K}_{2}\left[\mathrm{CoCl}_{4}\right]$ c. $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{SO}_{4}$ d. $\left[\mathrm{Co}(\mathrm{en})_{2}(\mathrm{SCN}) \mathrm{Cl}\right] \mathrm{Cl}$

Name the following coordination compounds.
a. $\mathrm{Na}_{4}\left[\mathrm{Ni}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]$
b. $\mathrm{K}_{2}\left[\mathrm{CoCl}_{4}\right]$
c. $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{SO}_{4}$
d. $\left[\mathrm{Co}(\mathrm{en})_{2}(\mathrm{SCN}) \mathrm{Cl}\right] \mathrm{Cl}$

Key Concepts

Ambidentate Ligands

Ambidentate ligands can bind to the central metal atom through more than one atom (for example, thiocyanate can coordinate through sulfur or nitrogen). When naming complexes containing such ligands, additional notations (such as kappa, ?, notation) may be required to specify the donor atom through which coordination occurs. This ensures clarity in the structure and bonding of the complex.

Identification of the Coordination Sphere

The coordination sphere is the part of the complex that includes the central metal ion and all the ligands attached to it. Distinguishing the coordination sphere from the counter ions is crucial for accurate naming. The coordination sphere is typically enclosed in square brackets in a chemical formula, and the charge balance is determined by considering both the complex ion and the counter ions.

Oxidation State Determination

Determining the oxidation state of the central metal ion is essential for the correct naming of coordination compounds. This is achieved by accounting for the charges of all ligands attached to the central metal and the overall charge of the complex, and then assigning an oxidation state that balances the overall charge in the compound.

Coordination Compound Nomenclature

This concept refers to the systematic way of naming coordination complexes following IUPAC guidelines. It involves listing the names of ligands (in a specific order, often alphabetical), specifying the oxidation state of the central metal using Roman numerals, and distinguishing between the coordination sphere and the counter ions. The rules ensure that the structure of the compound is uniquely described by its name.

Ligand Naming Conventions

Ligand naming conventions involve the proper identification of ligands by their systematic names, where anionic ligands often end in -o (e.g., chloro for Cl-) and neutral ligands have common names such as ammine for NH3 and ethylenediamine often abbreviated as en. Multiplicity prefixes (like di-, tri-, tetra-) are used when multiple identical ligands are present, and specific ordering rules govern how ligands are listed in the name.

Transcript

00:01 In this question we have been given certain compounds and we need to do their naming.

00:04 So the first compound that we have is n -a2, n -a -2 -o4 whole size.

00:13 Now this is called an oxalate ion.

00:17 So this will be called oxalato in our compound name.

00:23 Since this is our ketion, first we are going to write sodium and then we will write the name of the complex which is our an ion over here, right? so, this is going to be sodium.

00:38 This oxalato is present three times, so this is going to be pris, since this is an organic compound, sodium tris, oxalato, nickelate.

00:53 Now, we need to write the oxidation state of nickel here.

00:58 So this is present in minus two oxidation state.

01:04 This is going to get multiplied by three.

01:06 So in order to cut into.

01:06 Find the oxidation state this is going to be x minus 6 3 into 6 is equal to 2 right with a minus sign this is going to become 6 minus 2 which is 4 right so in the next part we have k2 co -cel4 this is our ket ion so we are going to start the name by this potassium then for this chlorine will have a prefix of tetra since this is present four times so this is going to be potassium tetr chloro cobaltate now chlorine is present in minus 1 oxidation state so x minus 1 into 4 is equal to 2 right so the oxidation of oxidation state of cobalt is 2 over here.

02:22 In the next part we have cu nh3 4 times so4.

02:29 Now this is an amine group and since this is present 4 times this is going to start with a tetra...

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