This LO focuses on creating complexes with multiple bonds between late transition metals and nitrogen. The questions will guide students through Mindiola and Hillhouse's communication that details the synthesis and investigation of three-coordinate terminal amido and imido complexes of nickel. This communication is significant because it describes the synthesis and structural characterization of what became known as his "double nickel" complex, which contains a Ni-N double bond.
This Learning Object is dedicated to the memory Prof. Greg Hillhouse and is part of the VIPEr LGBTQIAN+ LO collection created in celebration of Pride Month (June) 2022.
Professor Hillhouse was chosen to be honored because of his tremendous impact on inorganic chemistry. During his career at the University of Chicago, he pushed many chemical boundaries, investigating metal-ligand multiple bonding and how metals can be used to facilitate the creation of reactive nitrogen species. He was a determined scholar, a gifted teacher, a valued mentor, and close friend to many. For many years, Professor Hillhouse chose not to tell friends and colleagues that he was gay because he was afraid of the impact it would have on his career.
To read more about Prof. Hillhouse's life and work, please see the web resources listed below.
After completing this exercise, students should be able to:
- read and article from the primary chemical literature and extract information from it and from the supporting information,
- classify coordination complexes according to the covalent bond classification (CBC) method,
- identify orbital interactions that are the basis for metal-ligand bonding,
- draw Lewis structures for potential ligands and use these structures to explain ligand type, and
- fill in d orbital splitting diagrams for coordination complexes and determine magnetic properties of complexes.
The communication and questions should be provided to students 48-72 hours ahead to class. They should be instructed to red the article and then answer the guiding questions contained in the LO. This could done individually or in small groups. Students could then submit their answers before class and the article and associated questions can be discussed in class.
A number of these questions could be used as homework or exam questions if other information (structures or figures from the article) is provided.
The quality of the student work could be evaluated by gading the questions and providing a numerical score for the assignment. Alternatively, students could be graded for participation and the level of in-class discussion could be evaluated.
This LO has not been used in a class yet so there are no results to be shared. Once this is utilized in a class, this section will be updated.