More Practice With the 18 Electron Rule

The video tutorial covers the 18 electron rule, explaining its significance in determining the stability of transition metal complexes. It provides examples of ruthenium, molybdenum, and tungsten complexes, illustrating how to apply the rule to assess stability. The tutorial emphasizes the importance of understanding ligand charges and electron contributions, offering a foundation for more complex studies in transition metal chemistry.

What is the primary purpose of the 18 electron rule in transition metal chemistry?

• To determine the color of the complex

• To predict the stability of the complex

• To identify the oxidation state of the metal

• To calculate the molecular weight of the complex

In the ruthenium complex example, what is the total number of electrons contributed by the ligands?

• 14 electrons

• 12 electrons

• 10 electrons

• 8 electrons

For the first molybdenum complex discussed, why is it considered unstable?

• It has more than 18 electrons

• It has fewer than 18 electrons

• It has exactly 18 electrons

• It has an incorrect oxidation state

What is the oxidation state of molybdenum in the complex with seven methyl isocyanide ligands?

• +2

• +4

• +6

• 0

In the molybdenum complex with four carbonyls, one bromide, and one phenyl alkyl iodine, what is the total electron count?

• 22 electrons

• 20 electrons

• 18 electrons

• 16 electrons

What is the charge of the CP ligand in the tungsten complex?

• 1 minus

• 1 plus

• 2 minus

• Neutral

How many electrons does the tungsten atom contribute in the tungsten complex example?

• 4 electrons

• 8 electrons

• 6 electrons

• 2 electrons