Textbook Question
Sketch the structure of the complex in each of the following compounds and give the full compound name:
a. cis-[Co(NH3)4(H2O)2] (NO3)2
Ch.23 - Transition Metals and Coordination Chemistry
Chapter 23, Problem 71d
Sketch the structure of the complex in each of the following compounds and give the full compound name:
d. cis-[Ru(en)2Cl2]
Verified step by step guidance1
Step 1: Identify the central atom. In this case, the central atom is Ruthenium (Ru).
Step 2: Identify the ligands. The ligands are ethylenediamine (en) and Chlorine (Cl). Ethylenediamine is a bidentate ligand, meaning it can form two bonds with the central atom.
Step 3: Identify the geometry of the complex. Since there are 6 coordination sites (2 from each ethylenediamine and 1 from each chlorine), the geometry is octahedral.
Step 4: Sketch the structure. Place the Ruthenium atom at the center. Draw two ethylenediamine ligands and two chlorine atoms around the Ruthenium. Make sure to place the two chlorine atoms next to each other (cis configuration).
Step 5: Name the compound. The full name of the compound is cis-dichlorobis(ethylenediamine)ruthenium(II). The 'cis' indicates that the two chlorine atoms are next to each other. The 'dichloro' and 'bis(ethylenediamine)' indicate the ligands present and their quantities. The 'ruthenium(II)' indicates the central atom 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 bonded to surrounding molecules or ions called ligands. The arrangement and type of ligands influence the properties and reactivity of the complex. Understanding the nature of these interactions is crucial for sketching the structure of coordination complexes.
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Stereochemistry
Stereochemistry involves the study of the spatial arrangement of atoms in molecules. In coordination chemistry, the geometry of the complex, such as cis or trans configurations, affects its physical and chemical properties. Recognizing these arrangements is essential for accurately depicting the structure of the given compound.
Nomenclature of Coordination Compounds
The nomenclature of coordination compounds follows specific rules set by the International Union of Pure and Applied Chemistry (IUPAC). This includes naming the ligands, indicating their number, and specifying the oxidation state of the metal. Properly naming the compound is vital for clear communication in chemistry.
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Related Practice
Textbook Question
Sketch the structure of the complex in each of the following compounds and give the full compound name:
b. Na2[Ru(H2O)Cl5]
Textbook Question
Sketch the structure of the complex in each of the following compounds and give the full compound name:
c. trans-NH3[Co(C2O4)2(H2O)2]
Textbook Question
The molecule dimethylphosphinoethane [(CH3)2PCH2CH2P(CH3)2, which is abbreviated dmpe] is used as a ligand for some complexes that serve as catalysts. A complex that contains this ligand is Mo(CO)4(dmpe) .
a. Draw the Lewis structure for dmpe, and compare it with ethylenediamine as a coordinating ligand.
b. What is the oxidation state of Mo in Na2[Mo(CN)2(CO)2(dmpe)] ?
c. Sketch the structure of the [Mo(CN)2(CO)2(dmpe)]2- ion, including all the possible isomers.