Zinc-Zinc Bonds (Expanded and Updated)

Submitted by Wes Farrell / United States Naval Academy on Wed, 06/05/2019 - 11:42
Description

This paper in Science reports the synthesis of decamethyldizincocene, a stable compound of Zn(I) with a zinc-zinc bond. In the original LO, the title compound and the starting material, bis(pentamethylcyclopentadienyl)zinc, offer a nice link to metallocene chemistry, electron counting, and different modes of binding of cyclopentadienyl rings as well as more advanced discussions of MO diagrams.

Redox-switch polymerization catalysis

Submitted by Chip Nataro / Lafayette College on Tue, 03/26/2019 - 13:49
Description

This is the full literature discussion based on a communicaiton (J. Am. Chem. Soc. 2011, 133, 9278). This paper describes a redox-switch yttrium catalyst that is an active catalyst for the polymerization of L-lactide in the reduced form and inactive in the oxidized form. The catalyst contains a ferrocene-based ligand that serves as the redox active site in the catalyst. This full literature discussion is an extension of the one figure literature discussion that is listed below.

1FLO: Redox-switch polymerization catalysis

Submitted by Chip Nataro / Lafayette College on Fri, 03/22/2019 - 16:11
Description

This is what I hope will be a new classification of learning object called a one figure learning object (1FLO). The purpose is to take a single figure from a paper and present students with a series of questions related to interpreting the figure. This literature discussion is based on a paper (J. Am. Chem. Soc. 2011, 133, 9278) from Paula Diaconescu's lab in which a yttrium polymerization catalyst with a ferrocene-based ligand can effectively be rendered active or inactive depeneding on the valence state of the ligand.

Advanced ChemDraw (2019 Community Challenge #2)

Submitted by Chantal Stieber / Cal Poly Pomona on Tue, 02/12/2019 - 12:12
Description

This in-class activity was designed for a Chemical Communications course with second-year students. It is the second part of a two-week segment in which students learn how to use ChemDraw (or similar drawing software to create digital drawings of molecules).

5-ish Slides About Bridging Hydrides and the [Cr(CO)5HCr(CO)5] anion

Submitted by Kyle Grice / DePaul University on Thu, 01/31/2019 - 13:52
Description

This set of slides was made for my Organometallics class based on questions about bridging hydrides and specifically the chromium molecule. I decided to make these slides to answer the questions, and do a DFT calc to show the MO's involved in bonding of the hydride. 

 

Guided Literature Discussion of “Next-Generation Water-Soluble Homogeneous Catalysts for Conversion of Glycerol to Lactic Acid”

Submitted by M. Watzky / University of Northern Colorado on Mon, 01/28/2019 - 14:50
Description

This Guided Literature Discussion was assigned as a course project, and is the result of work originated by students Joie Games and Benjamin Melzer.  It is based on the article “Next-Generation Water-Soluble Homogeneous Catalysts for Conversion of Glycerol to Lactic Acid” by Matthew Finn, J. August Ridenour, Jacob Heltzel, Christopher Cahill, and Adelina Voutchkova-Kostal in Organometallics 2018 37 (9), 1400-1409.

Guided Literature Discussion of “Mechanism of the Platinum(II)-Catalyzed Hydroamination of 4-Pentenylamines”

Submitted by M. Watzky / University of Northern Colorado on Wed, 01/16/2019 - 19:11
Description

This Guided Literature Discussion was assigned as a course project, and is the result of work originated by students Jana Forster and Kristofer Reiser.  It is based on the article “Mechanism of the Platinum(II)-Catalyzed Hydroamination of 4-Pentenylamines” by Christopher F. Bender, Timothy J. Brown, and Ross A. Widenhoefer in Organometallics 2016 35 (2), 113-125.

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