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Ch.21 - Transition Elements and Coordination Chemistry
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Not the one you use?Change textbook
All textbooksMcMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblem 21.78a
Chapter 21, Problem 21.78a

What is the systematic name for each of the following ions?
(a) [MnCl4]2-
(b) [Ni(NH3)6]2+

Verified step by step guidance
1
Identify the central metal ion in each complex. For (a), the central metal is manganese (Mn), and for (b), it is nickel (Ni).
Determine the oxidation state of the central metal ion. For (a) [MnCl_4]^{2-}, consider the charge of the chloride ions (Cl^-) and the overall charge of the complex to find the oxidation state of Mn. For (b) [Ni(NH_3)_6]^{2+}, consider the charge of the ammonia ligands (neutral) and the overall charge of the complex to find the oxidation state of Ni.
Name the ligands in each complex. For (a), the ligand is chloride, and for (b), the ligand is ammonia. Use the appropriate prefixes to indicate the number of each type of ligand: 'tetra-' for four chlorides and 'hexa-' for six ammonias.
Combine the ligand names with the metal name and its oxidation state. For (a), use the prefix for the ligands followed by the metal name and its oxidation state in Roman numerals. For (b), do the same.
Ensure the systematic name follows the IUPAC naming conventions for coordination compounds, which typically list the ligands alphabetically followed by the metal and its oxidation state.>

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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 called ligands. The nature of these ligands, whether they are neutral or charged, and their arrangement around the metal center significantly influence the properties and naming of the compound.
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Coordination Compound Naming

Oxidation States

The oxidation state of an element in a compound indicates the degree of oxidation of that element. It is crucial for determining the systematic name of coordination compounds, as it helps identify the charge of the metal ion, which is essential for proper nomenclature.
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Oxidation Numbers

IUPAC Nomenclature

The International Union of Pure and Applied Chemistry (IUPAC) provides systematic rules for naming chemical compounds. For coordination compounds, the name includes the ligands listed alphabetically, followed by the metal's name and its oxidation state in Roman numerals, ensuring clarity and consistency in chemical communication.
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Related Practice
Textbook Question

Six isomers for a square planar palladium(II) complex that contains two Cl-and two SCN-ligands are shown below.


(a) Which structures are cis-trans isomers?

(b) Which structures are linkage isomers?

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Textbook Question

Tell how many diastereoisomers are possible for each of the following complexes, and draw their structures. 

(a) Pt(NH3)3Cl (square planar) 

(b) [FeBr2Cl2(en)]-

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Textbook Question

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.

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Textbook Question

Two first-series transition metals have three unpaired electrons in complex ions of the type [MCl4]2-.

(a) What are the oxidation state and the identity of M in these complexes?

(b) Draw valence bond orbital diagrams for the two possible ions.

(c) Based on common oxidation states of first-series transition metals (Figure 21.6), which ion is more likely to exist?

<QUESTION REFERENCES FIGURE 21.6>

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Textbook Question

Tell how many diastereoisomers are possible for each of the following complexes, and draw their structures. 

(c) [Cu(H2O)4Cl2]+

(d) Ru(NH3)3I3

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Textbook Question

Give a valence bond description of the bonding in each of the following complexes. Include orbital diagrams for the free metal ion and the metal ion in the complex. Indicate which hybrid orbitals the metal ion uses for bonding, and specify the number of unpaired electrons. 

(b) [NiBr4]2- (tetrahedral) 

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