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Over the years I have developed a number of interactive tools that I use in my classes. This is a tool that seems appropriate for VIPEr. Comments are always appreciated, and I am always interested in developing new tools if there is something you might find useful.
This tool allows you to look at how molecular orbitals change as the difference in electronegativities of the parent atomic orbitals increases.
NOTE ADDED OCT 2014: As Flick's site at Wellesley is not available anymore I looked in his archive website (http://www.flicksstuff.com) and found the final version of this web resource, and it is linked below. I have left the rest of the LO unchanged for archival purposes. --Adam Johnson, Harvey Mudd College
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In reply to can't wait to try it in class! by Barbara Reisner / James Madison University
This does look great! And just in time to use in class tomorrow.
I think a great addition would be to couple this with images showing how the molecular orbital probability distributions change as one particular atomic orbital begins to dominate in the molecular orbital.
In reply to Effect on orbital shapes by Maggie Geselbracht / Reed College
Maggie,
Take a look at and see if this is of interest. http://www.wellesley.edu/Chemistry/Flick/chem341/mocovtoionic1.html. After reading your suggestion I tried to think of a reasonably honest way of showing it, and this seems to work. The black circles represent the nuclei and the percent of A and B range from 50:50 to 99.5%B 0.5% A.
Cheers,
Flick
In reply to Response to Maggie's Suggestion by Flick Coleman / Wellesley College
That's about two orders of magnitude better than the crappy drawings I've been putting up on the whiteboard all these years.... The addition of the sigma orbitals is fantastic (a corresponding sigma* would also be cool)!
In reply to A must use. by Nancy Williams / Scripps College, Pitzer College, Claremont McKenna College
I had the same thought as Scott earlier this evening and the latest version, with sigma bonding and antibonding orbitals is at http://www.wellesley.edu/Chemistry/Flick/chem341/mocovtoionic2.html
Cheers,
Flick
In reply to Including bonding and antibonding sigma orbitals by Flick Coleman / Wellesley College
My "energy levels" tool attempts to do something similar:
http://firstyear.chem.usyd.edu.au/calculators/mo_diagrams.shtml
Click on the "energy levels" link.
It also calculates the Mulliken charges and Wiberg bond order and I use this to show the balance between ionic and covalent contributions to the bond.
In reply to A similar tool..... by Adam Bridgeman / The University of Sydney
Adam
In reply to Thanks!! by Nancy Williams / Scripps College, Pitzer College, Claremont McKenna College
I am sad to see that the link is no longer live. I know that Flick was going to try to archive it somewhere somehow after he retired. We will update this for sure!
I found it! http://www.flicksstuff.com/wfcmaterials/mocovtoionic2.html
I'll put this up in the original LO too
Oh thank goodness. I need this for next week's class, just tried the link, and I think I screamed just a little when the link broke. Thanks much, Adam, for tracking down the archive. Phew!
It's almost 2021, and Flash is about to lose support on all platforms, which means this tool won't run any more! So I recorded a short video of me using the tool the way I would in class, because that was easier than me learning HTML5 and making a new one.
https://www.youtube.com/watch?v=hWFqMKz2TZY
I stumbled on Stephen's very nice video and went on a hunt for the original tool, which led me here. I was able to get it working after a bit of tinkering, so I thought I would share my method in case it might be useful to others.
1) Download the SWF file from the archive.org entry for Flick's personal website: link.
2) Run the SWF through an Adobe Flash emulator. I was surprised to learn that there are many emulators out there, but the first I tried was Ruffle, which worked perfectly. Upload the SWF to the demo page and enjoy!
Thanks for the instructions Kyle. I would have never been able to find that, and with your post I got it running in ~1 min. I like this for a quick visual using the incremental adjustments.