Chemistry 101

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Old 07-19-2006
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Post Chemistry 101

This thread is for all those who either wish to learn more about chemistry, or have questions on basic or advanced chemistry skills, formulas etc.

Feel free to ask questions!!!!
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Old 07-19-2006
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Re: Chemistry 101

I am prepared to teach!
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Old 07-19-2006
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Re: Chemistry 101

Who can propose a tetradentate ligand with a -4 charge such that three of them chelate two Co(3+) to give a helicate complex as described below?

Uncle Al likes salts of chiral complex ions with geometrically (nearly) identical cations and anions. Example: Resolved [Co(en)3](3+) is almost exactly superposable upon [Co(ox)3](3-),

http://www.mazepath.com/uncleal/xions.png
stereoimages

to make the two mirror-image salts,

http://www.mazepath.com/uncleal/xsalt.png
stereoimages

One can get very clever and create helicates by linking bidentate ligands. Here we look at homochiral [Co(phen)3](3+) and [Co2(bisphen)3](6+)

http://www.mazepath.com/uncleal/xheli.png
stereoimages

It obviously works for [Co(bipy)3](3+) and [Co2(bisbipy)3](6+), too. Now for the fun part! Who can propose a helicate ligand that will give isomorphous [Co2(ligand)3](6-)?

Don't be shy!
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Re: Chemistry 101

to start out, what is a ligand?
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Re: Chemistry 101

Oh wow. I wish I was best friends with you UncleAl.
It's unfortunate that I got excited when I read your last post.

Quote:
Originally Posted by UncleAl
Who can propose a tetradentate ligand with a -4 charge
i didn't know there was such a thing. I can't think of any with a -4 charge. I guess I'm not really a professional chemist.
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Old 07-19-2006
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Re: Chemistry 101

ligands are atoms or molecules that share its electons with a central ion.

Im happy to lend my insights to anyone that needs help.

And al I dont think thats 101
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Old 07-19-2006
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Re: Chemistry 101

two nights ago, I was going through a list of college classes.

I decided to embark on a trail leading to chemistry synthesis.

I have a long way to go.

But If all goes well, I should be starting this fall.

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Re: Chemistry 101

Quote:
Originally Posted by UncleAl
Who can propose a tetradentate ligand with a -4 charge such that three of them chelate two Co(3+) to give a helicate complex as described below?

Uncle Al likes salts of chiral complex ions with geometrically (nearly) identical cations and anions. Example: Resolved [Co(en)3](3+) is almost exactly superposable upon [Co(ox)3](3-),

http://www.mazepath.com/uncleal/xions.png
stereoimages

to make the two mirror-image salts,

http://www.mazepath.com/uncleal/xsalt.png
stereoimages

One can get very clever and create helicates by linking bidentate ligands. Here we look at homochiral [Co(phen)3](3+) and [Co2(bisphen)3](6+)

http://www.mazepath.com/uncleal/xheli.png
stereoimages

It obviously works for [Co(bipy)3](3+) and [Co2(bisbipy)3](6+), too. Now for the fun part! Who can propose a helicate ligand that will give isomorphous [Co2(ligand)3](6-)?

Don't be shy!

wow, so, this is what I've gotten myself into.

*gulp*
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Old 07-20-2006
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Re: Chemistry 101

Quote:
wow, so, this is what I've gotten myself into.
In September 1969 1200+ students enrolled in MSU organic chemistry/majors. 350 made it to the second term. 17 graduated BS/Chem. Elitism insists the better is preferable to the worse. Uncle Al is an elitist, as were the other 16.

Evolution is a hoot if you are one of the survivors.
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Old 07-20-2006
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Re: Chemistry 101

Which MSU is that, Unc? There are at least two that I know of...
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