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I am prepared to teach! :)

Well let me try.   Basics first! Ions are atoms or melecules that are either deficient or surplus of electrons. Puting it simply it means that the number of electrons and protons in an ions is not equ

Plastics are polymers or long molecules made up of repeat units. For example, polyethylene is long molecule made of ethylene units. The repeat unit is called a monomer. The long chain of monomers, lik

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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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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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.

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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.

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