Ch.21 - Transition Elements and Coordination Chemistry

McMurry8th EditionChemistryISBN: 9781292336145Not the one you use?Change textbook

McMurry 8th Edition

Ch.21 - Transition Elements and Coordination Chemistry

Problem 21.79a

Chapter 21, Problem 21.79a

Assign a systematic name to each of the following ions.
(a) [AuCl₄]^-
(b) [Fe(CN)₆]^4-

Verified step by step guidance

Identify the central metal atom in each complex ion. For (a), the central metal is Au (gold), and for (b), it is Fe (iron).

Determine the oxidation state of the central metal atom. For (a), consider the charge of the ligands (Cl is -1) and the overall charge of the ion (-1) to find the oxidation state of Au. For (b), consider the charge of the ligands (CN is -1) and the overall charge of the ion (-4) to find the oxidation state of Fe.

Name the ligands. For (a), the ligand is chloride, and for (b), the ligand is cyanide. Use the appropriate prefixes if there are multiple identical ligands (e.g., tetra- for four chloride ions).

Combine the ligand names with the metal name. For anionic complexes, the metal name ends with the suffix '-ate'. For (a), use 'aurate' for gold, and for (b), use 'ferrate' for iron.

Write the systematic name by placing the ligand names first, followed by the metal name with its oxidation state in Roman numerals in parentheses.>

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Coordination Compounds

Coordination compounds consist of a central metal atom or ion bonded to surrounding molecules or ions, known as ligands. The nature of these ligands and their arrangement around the metal center significantly influence the properties and reactivity of the compound. Understanding the structure of coordination compounds is essential for naming them systematically.

Oxidation States

The oxidation state of an element in a compound indicates the degree of oxidation or reduction it has undergone. In coordination compounds, the oxidation state of the central metal ion is crucial for determining the systematic name. For example, in [AuCl4]-, gold has an oxidation state of +3, which is important for naming the ion correctly.

IUPAC Nomenclature

The International Union of Pure and Applied Chemistry (IUPAC) provides systematic rules for naming chemical compounds, including coordination complexes. The naming convention involves identifying the ligands, their quantities, and the oxidation state of the metal. For instance, in [Fe(CN)6]4-, the complex is named hexacyanoferrate(II) based on these rules.

Recommended video:

Guided course

02:39

Rules for Naming Alkanes

Related Practice

Textbook Question

What is the name of the compound [Fe(H2O)5(SCN)]Cl2?

(a) pentaaquathiocyanatoiron(III) chloride

(b) pentaaquachlorothiocyanato iron(III)

(d) pentaaquathiocyanatoiron(II) chloride

494

views

Textbook Question

Nickel(II) complexes with the formula NiX₂L₂, where X⁻ is Cl⁻ or N-bonded NCS⁻ and L is the monodentate triphenylphosphine ligand P(C₆H₅)₃, can be square planar or tetrahedral.

(a) Draw crystal field energy-level diagrams for a square planar and a tetrahedral nickel(II) complex, and show the population of the orbitals.

views

Textbook Question

Draw a crystal field energy-level diagram, and predict the number of unpaired electrons for each of the following:

(a) [Mn(H2O)6]2+

Cobalt(III) trifluoroacetylacetonate, Co(tfac)₃, is a sixc oordinate, octahedral metal chelate in which three planar, bidentate tfac ligands are attached to a central Co atom:

(a) Draw all possible diastereoisomers and enantiomers of Co(tfac)₃.

105

views

Textbook Question

Which of the following complexes are diamagnetic?

(a) [Ni(H₂O)₆]²⁺

(b) [Co(CN)₆]^3-

(d) [Cu(NH₃)₄]²⁺ (square planar)

122

views

Textbook Question

Classify the following ligands as monodentate, bidentate, tri-dentate, or tetradentate. Which can form chelate rings?