Chemistry 101

[learnin to learn]

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!!!!

[Mercedes Benzene]

I am prepared to teach!

[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!

[learnin to learn]

to start out, what is a ligand?

[Mercedes Benzene]

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

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.

[Jay-qu]

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

[Drip Curl Magic]

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.

><

[Drip Curl Magic]

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*

[UncleAl]

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.

[pgrmdave]

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