Palladium-Catalyzed Biaryl Coupling Using PEPPSI Under Aqueous Microwave Conditions

Submitted by Gerard Rowe / University of South Carolina Aiken on Mon, 07/16/2012 - 11:53
Description

This is a lab that gives students a chance to use a catalyst to perform "green" chemistry.  Specifically, they will make one of the new generation of palladium cross-coupling catalysts called PEPPSI, which is a highly active, water soluble catalyst and use it in a Suzuki coupling reaction.  Student groups of 2 or 3 will synthesize an NHC ligand, incorporate it into a metal compound, and then perform catalysis in an aqueous microwave reaction using a variety of different reaction conditions in order to determine the optimal catalytic system.

Application of Organometallic Chemistry – Breaking the Inert C-H Bond

Submitted by John Lee / University of Tennessee Chattanooga on Mon, 07/16/2012 - 11:39
Description

This learning object is a literature discussion based on a paper published in Nature (Labinger, J. A.; Bercaw, J. E. Nature 2002, 417, 507-514; doi:10.1038/446391a) discussing the mechanisms of C-H activation by transition metal complexes. This is a topic that could be covered at the end of a section on organometallic chemistry that shows a “newer” application.

Writing assignment series related to topics discussed in organometallic chemistry - Assignment 1 Literature Summary

Submitted by Abby O'Connor / The College of New Jersey on Mon, 07/16/2012 - 10:58
Description

Searching and reading the literature is an important tool in teaching organometallic chemistry. This overall project focuses on the improving students' writing skills and to begin to think critically about articles in the literature through a series of different writing assignments. This project is used in a semester long course on organometallics and reaction mechanisms. The first assignment (this LO) is a summary, the second is related to the NSF highlight, and the third is a literature critique.

Synthesis and Characterization of Ferrocene, Acetylferrocene and Ferrocenylethanol

Submitted by Henry Acquaye / Department of Chemistry, University of Redlands on Mon, 07/16/2012 - 10:57
Description

This project is designed to develop the research skills that are required to tackle projects that are larger and more complex than those encountered in first and second year chemistry courses.  The lab is an integrated project-oriented laboratory including synthesis and the use of instrumental techniques such as UV-Visible and infrared, 1H-NMR and 13C-NMR spectrometry, chromatography (HPLC, TLC) and cyclic voltammetry.

The Covalent Bond Classification (CBC) website

Submitted by Chip Nataro / Lafayette College on Thu, 05/17/2012 - 09:27
Description

The covalent bond classification (CBC) method is a way to count electrons for transition metal compounds. It classifies ligands based on their type, either L, X or Z. This is the website for all things CBC. It contains a library which list useful materials for teaching CBC including books that teach the CBC method. The site also has teaching materials that contain MLX plots for all of the transition metals. The MLX plots are charts that show various electron counts and valence for a given metal.

VIPEr Screencast

Submitted by Chip Nataro / Lafayette College on Wed, 05/09/2012 - 10:27
Description

This screencast is a brief introduction to some of the features of VIPEr.

Five Slides About Percent Buried Volume (%Vbur)

Submitted by Chip Nataro / Lafayette College on Mon, 04/23/2012 - 09:29
Description

These slides present a walkthough of performing a Percent Buried Volume (%Vbur) calculation. The %Vbur is a measurement of the bulk of a ligand coordinated to a transiton metal. The calculation uses the crystal structure of a compound to determine how much space a ligand occupies. It does this by placing the metal at the center of a sphere and then calculates the volume of that sphere occupied by the ligand. Originally developed for N-heterocyclic carbene (NHC) ligands, it has also been applied to mono- and bidentate phosphines.

CBC (Covalent Bond Classification) Method of Electron Counting

Submitted by Chip Nataro / Lafayette College on Thu, 02/02/2012 - 12:29
Description

This series of slides works through an example of electron counting using the CBC (Covalent Bond Classification) method. It compares and contrasts the classic ionic and covalent methods to the CBC method. The example used in these slides is an exception to the 18 electron rule using the the classic methods, but by CBC classification it is a very common ML4X4 tetravalent 16 electron Ti compound.

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