This literature discussion learning object examines the first reported synthesis in 1983 of the long anticipated quadruply bonded ditungsten tetracarboxylate dimers by Dr. Al Sattelberger and co-workers. This LO is part of a special VIPEr collection honoring the 2022 ACS National Award recipients in the field of inorganic chemistry. Alfred P. Sattelberger was the recipient of the 2022 ACS Award for Distinguished Service in the Advancement of Inorganic Chemistry.
Students will be able to:
- Explain the bonding in a metal-metal quadruple bond
- Describe the experimental evidence that supports the presence of a metal-metal quadruple bond
- Explain the synthesis of a transition metal complex involving oxidation-reduction chemistry
- Count electrons in a transition metal complex
- Describe the symmetry of the complex
I would give the students the paper and the questions in advance, and then use it for a small group in-class exercise. I would make each group responsible for writing the answer to one question on the board and ask them to explain their answer to the class. Students will likely need hints to get started on question 3 about finding experimental evidence for the quadruple bond.
I would grade individual students’ written responses to the questions, which after the class discussion should be correct!
I have not taught this LO yet. I predict that students may struggle with explaining the chemical reaction because they may not be familiar with sodium amalgam. Counting electrons could also be a challenge because students may not be familiar with metal-metal bonding.