Symmetry

31 Jan 2019

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

Submitted by Kyle Grice, DePaul University
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. 

 

Topics Covered: 
Bonding models: Discrete molecules
Chemical literature
Computer modeling
Coordination chemistry
Electronic structure
Organometallic chemistry
Symmetry
Visualization
Prerequisites: 
First Semester Inorganic Chemistry / Foundation Course in Inorganic Chemistry
Course Level: 
Second year
Upper Division
Corequisites: 
No Corequisites
Subdiscipline: 
Coordination Chemistry
Molecular Structure and Bonding
Organometallic Chemistry
Learning Goals: 

A student will be able to explain bridging hydride bonding

A student will be able to perform electron counting on a chromium comples with a bridging hydride

A student will be able to interepret calculated DFT molecular orbitals. 

Related activities: 
Literature Discussion of R3CH→ SiFR3 Agostic Interactions
Introduction to Agostic Interactions
Molecular Orbitals of Square-Planar Tetrahydrides
Time Required: 
15 min
Evaluation
Evaluation Methods: 

This was provided as supplementary material outside of lecture. 

12 Dec 2018

Foundations Inorganic Chemistry for New Faculty

Submitted by Chip Nataro, Lafayette College

What is a foundations inorganic course? Here is a great description

https://pubs.acs.org/doi/abs/10.1021/ed500624t

 

Subdiscipline: 
Atomic Structure and Periodicity
Coordination Chemistry
Introductory Chemistry
Main Group Chemistry
Molecular Structure and Bonding
Science Skills, Practices, and Resources
Solid State and Materials Chemistry
Topics Covered: 
Acid-base chemistry
Bonding models: Discrete molecules
Bonding models: Extended systems
Chemical literature
Communication skills
Coordination chemistry
Descriptive chemistry
Electronic structure
Extended structure
Main group chemistry
Molecular structure
Nomenclature
Periodic trends
Solids & solid state chemistry
Symmetry
Prerequisites: 
General Chemistry
Corequisites: 
No Corequisites
Course Level: 
Second year
10 May 2018

3D Sym Op

Submitted by Caroline Saouma, University of Utah
Evaluation Methods: 

None

Description: 

This is a great app that helps students see the symmetry in molecules. It allows you to choose a molecule (by name, structure, or point group) and display a 3D rendition of it. You can then have it display the symmetry elements, and/or apply all the symmetry operations. 

It is available for both android and apple phones: (probably easier to just search for it)

apple: https://itunes.apple.com/us/app/3d-sym-op/id1067556681?mt=8

android: https://play.google.com/store/apps/details?id=com.nus.symmo&hl=en_US

Topics Covered: 
Symmetry
Prerequisites: 
General Chemistry
Course Level: 
Second year
Upper Division
Learning Goals: 

A student should be able to find symmetry elements in molecules. 

Corequisites: 
No Corequisites
Subdiscipline: 
Molecular Structure and Bonding
Implementation Notes: 

In class I project my phone screen so they can see it, and I encourage the students to work along with their phones. I prefer this to models, as it is hard to remember what things looked like before you did the transformation, and moreover, my students have a hard time finding the symmetry elements. 

 

I encourage the students to play with it anytime they have a few spare moments- waiting for the bus, in line for food, etc. 

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