What is the systematic name for each of the following...

What is the systematic name for each of the following compounds? $\begin{array}{ll}{\text { (a) }\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{SO}_{4}} & {\text { (b) } \mathrm{Cr}(\mathrm{CO})_{6}} \\ {\text { (c) } \mathrm{K}_{3}\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]} & {\text { (d) }\left[\mathrm{Co}(\mathrm{en})_{2}\left(\mathrm{NH}_{3}\right) \mathrm{CN}\right] \mathrm{Cl}_{2}}\end{array}$

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

$\begin{array}{ll}{\text { (a) }\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{SO}_{4}} & {\text { (b) } \mathrm{Cr}(\mathrm{CO})_{6}} \\ {\text { (c) } \mathrm{K}_{3}\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]} & {\text { (d) }\left[\mathrm{Co}(\mathrm{en})_{2}\left(\mathrm{NH}_{3}\right) \mathrm{CN}\right] \mathrm{Cl}_{2}}\end{array}$

Key Concepts

Coordination Sphere and Counter Ions

In the nomenclature of coordination compounds, it is essential to distinguish between the coordination sphere—the portion of the compound where the metal is directly bonded to ligands—and the counter ions, which balance the overall charge of the complex. The name of the complex ion is usually enclosed in square brackets, with the counter ions listed outside, ensuring clarity in chemical communication.

Chelating and Ambidentate Ligands

Chelating ligands, which can form more than one bond to a single metal ion, and ambidentate ligands, which can bind through different atoms, require careful and specific naming. These ligands often carry special designations to indicate their points of attachment and mode of bonding, ensuring that the systematic name accurately reflects the geometry and coordination environment of the compound.

Prefix Usage in Coordination Chemistry

Prefixes such as 'di-', 'tri-', and 'tetra-' are used to indicate the number of identical ligands present in the coordination sphere. These prefixes provide a concise way of expressing the molecular composition of the complex and are an important component of systematic nomenclature.

Oxidation State Determination

Determining the oxidation state of the central metal in a coordination compound is crucial for accurately naming and understanding its electronic structure and reactivity. This is typically done by balancing the known charges of the coordinating ligands and any counter ions with the overall charge of the complex, which then informs the final systematic name.

Ligand Naming

Ligands in coordination chemistry are named according to established conventions that often reflect their charge and binding mode. Neutral ligands typically retain or slightly modify their common names (for example, using 'ammine' for NH?), while anionic ligands have their names modified, often ending in '-o'. This clear designation helps in distinguishing the type of ligand and its contribution to the complex.

Coordination Compound Nomenclature

Systematic naming of coordination compounds follows IUPAC guidelines to clearly describe the composition and structure of a complex. This involves specifying the identity and number of ligands attached to the metal center, indicating the oxidation state of the metal, and differentiating the coordination sphere from any counter ions. The systematic name uniquely conveys all necessary structural details about the compound.

Transcript

00:01 So here we're going to be naming these ionic compounds, but they also have coordination compounds within them.

00:07 And so we just really combine those rules.

00:09 We have two words, one for the cat ion, one for the anion.

00:12 And we use our traditional rules for naming complex ions, which is a ligand with the number of it put before it, and then the metal in this order.

00:25 So first one here.

00:27 Our cat ion is this complex ion.

00:29 We have four amine ligands.

00:33 So we have tetra amine.

00:37 And then we describe the metal, which is copper.

00:39 So we say copper.

00:42 And then if you're not comfortable of getting the charts here, go back and work on the previous exercises.

00:49 But in this case, it's copper two.

00:51 And then our anion is so4 -2 minus.

00:53 That's sulfate.

00:55 And that's our answer.

00:58 Okay, next one we have six carbonyl ligins.