Isotope Effects in Arene C-H Bond Activation by Cp*Rh(PMe3)

Submitted by Adam Johnson / Harvey Mudd College on Wed, 12/28/2016 - 13:20
Description

This literature discussion is based on a paper by Bill Jones and Frank Feher (J. Am. Chem. Soc., 1986, 108, 4814-4819). In this paper, they study the activation of aromatic C-H bonds by a rhodium complex. Through careful experimental design, they were able to examine isotope effects on the selectivity of the reaction. Analysis of the rate data allowed them to prepare a reaction coordinate free energy diagram. This paper also introduces the effects of C-H bond breaking in early or late transition states on the vibrational energy spacing at both ground and excited states.

Binding dinitrogen to titanium sandwich compounds

Submitted by Chip Nataro / Lafayette College on Tue, 12/27/2016 - 12:06
Description

The literature discussion is based on one of the early papers from the Chirik group (J. Am. Chem. Soc., 2004, 126, 14688). In this communication, the coordination of N2 to a series of (C5H4R)2Ti fragments is examined. Being a communication, it is very short and that helps make it less intimidating for undergraduates. But don't be fooled, it is very rich in the fundamental concepts of orgnaometallic chemistry.

X-ray Crystallography

Submitted by David J Harding / Walailak University on Thu, 12/15/2016 - 22:58
Description

The website shared here includes excellent simulations concerning a wide variety of techniques commonly used in materials science and inorganic chemistry. I have found it particularly useful for X-ray crystallography as the simulations help understand the lectures. 

Molecular Hydrogen Complexes of Mo and W

Submitted by Kyle Grice / DePaul University on Fri, 11/11/2016 - 19:28
Description

Literature discussion about the first examples of molecular hydrogen complexes isolated by Gregory J. Kubas in the early 80s. The questions are divided into groups with two levels of difficulty.

The more basic group of questions includes topics on:

1)      Coordination Chemistry: electron count, geometry, oxidation state, orbital interactions, types of ligands, binding modes, cis/trans and fac/mer isomers.

2)      Symmetry elements and point groups.

3)      Basic concepts on spectroscopy: NMR, Raman, IR, UV/Vis, XANES, EXAFS, neutron and X-ray diffraction

Ethylene compounds of the coinage metals

Submitted by Chip Nataro / Lafayette College on Mon, 10/17/2016 - 12:55
Description

This is a literature discussion based on a short paper on ethylene compounds of the coinage metals (Dias, H. V. R.; Wu, J. Organometallics 2012, 31, 1511-1517). In this paper, analogous ethylene compounds are prepared with Cu(I), Ag(I) and Au(I). The other ligand on the coinage metal is a scorpionate tris(pyrazolyl)borate ligand. The strength of the interaction between the metal and the ethylene varies significantly with the coinage metal as seen in X-ray crystallographic and spectroscopic (1H and 13C NMR) data.

Chapter 7--Stanley Organometallics

Submitted by George Stanley / Louisiana State University on Fri, 07/29/2016 - 12:19
Description

Chapter 7 from George Stanley's organometallics course, Alkenes and Alkynes

 

this chapter covers bonding and structure of metal pi-bonds, some descriptive chemistry, and their NMR spectroscopy.

The powerpoint slides contain answers to some of the in-class exercises, so those are behind the "faculty only" wall. I shares these with students after the class, but not before.

Chapter 6--Stanley Organometallics

Submitted by George Stanley / Louisiana State University on Fri, 07/29/2016 - 11:51
Description

Chapter 6 from George Stanley's organometallics course, Alkyls

 

this chapter covers bonding and structure of metal alkyls, some descriptive chemistry, and their NMR spectroscopy.

The powerpoint slides contain answers to some of the in-class exercises, so those are behind the "faculty only" wall. I shares these with students after the class, but not before.

everyone is more than welcome to edit the materials to suit their own uses, and I would appreciate being notified of any mistakes that are found.


Chapter 5--Stanley Organometallics

Submitted by George Stanley / Louisiana State University on Thu, 07/28/2016 - 20:17
Description

Chapter 5 from George Stanley's organometallics course, Hydrides

 

this chapter covers bonding and structure of metal phosphines, some descriptive chemistry, and their NMR spectroscopy.

The powerpoint slides contain answers to some of the in-class exercises, so those are behind the "faculty only" wall. I shares these with students after the class, but not before.

everyone is more than welcome to edit the materials to suit their own uses, and I would appreciate being notified of any mistakes that are found.


Chapter 4--Stanley Organometallics

Submitted by George Stanley / Louisiana State University on Tue, 07/26/2016 - 15:55
Description

Chapter 4 from George Stanley's organometallics course, Phosphines

 

this chapter covers bonding and structure of metal phosphines, some descriptive chemistry, and their NMR spectroscopy.

The powerpoint slides contain answers to some of the in-class exercises, so those are behind the "faculty only" wall. I shares these with students after the class, but not before.

everyone is more than welcome to edit the materials to suit their own uses, and I would appreciate being notified of any mistakes that are found.