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!!!!

/forums/images/smilies/banana_sign.gif

[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.

 

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]

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...

[UncleAl]

Moo U, Michigan State. In 1969 the Chemistry building was newly constructed - almost a square block of stuff. 5.5 stories tall, three stories deep, and a lot of the basement labs had lead-lined doors. Great scientific glassblowing course.

 

Don't go there. Out-of-state students are vigorously screwed from the moment their feet touch the campus. Summers are hellacious heat, humidity, and mosquitoes.

[Jay-qu]

started with 1200+ and finished with 17.. wonder how many will get through mine, it only started with 16!

[Mercedes Benzene]

started with 1200+ and finished with 17.. wonder how many will get through mine, it only started with 16!

 

I want to major in organic chemistry one day too...

Then again, I have a bunch of majors that I want to achieve once I go to college. :naughty:

[Jay-qu]

I have a few on the list to, but I could be here forever learning - just want to get out into it really.

 

What do you do for a job UncleAl?

[UncleAl]

What do you do for a job UncleAl?

Industrial organic chemist: fine and exotic synthesis, CAD molecules; insect ecdysteroid mimesis; human implantable prostheses, radiation grafting, hydrogels, and medical polymers; novel routes to ambient pressure diamond synthesis.

 

Management, "GODDAMN IT, Schwartz, it CAN'T work that way!"

Uncle Al, "but it does"

 

I have a 1450 carat Type IIb "diamond" (glass paperweight) on my desk courtesy of my current CFO. It could happen - they want bulk abrasive. Huge gems would be deliciously insubordinate.

[pgrmdave]

Management, "GODDAMN IT, Schwartz, it CAN'T work that way!"

Uncle Al, "but it does"

 

I get the impression that Unc is nearly the same in real life as he is online :lol:

[Jay-qu]

sounds like an interesting job :eek2: