Jump to content


Photo
- - - - -

Chemistry 101


  • Please log in to reply
206 replies to this topic

#1 learnin to learn

learnin to learn

    Explaining

  • Members
  • 661 posts

Posted 19 July 2006 - 06:27 PM

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!!!!


#2 Mercedes Benzene

Mercedes Benzene

    Student

  • Moderators
  • 2950 posts

Posted 19 July 2006 - 06:34 PM

I am prepared to teach!
:)

#3 UncleAl

UncleAl

    Creating

  • Members
  • 1212 posts

Posted 19 July 2006 - 06:45 PM

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....cleal/xions.png
stereoimages

to make the two mirror-image salts,

http://www.mazepath....cleal/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....cleal/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!

#4 learnin to learn

learnin to learn

    Explaining

  • Members
  • 661 posts

Posted 19 July 2006 - 06:58 PM

to start out, what is a ligand?

#5 Mercedes Benzene

Mercedes Benzene

    Student

  • Moderators
  • 2950 posts

Posted 19 July 2006 - 07:18 PM

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. :)

#6 Jay-qu

Jay-qu

    Ancora Imparo

  • Members
  • 6340 posts

Posted 19 July 2006 - 08:58 PM

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 :)

#7 Drip Curl Magic

Drip Curl Magic

    Creating

  • Members
  • 1183 posts

Posted 19 July 2006 - 09:10 PM

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.

><

#8 Drip Curl Magic

Drip Curl Magic

    Creating

  • Members
  • 1183 posts

Posted 19 July 2006 - 09:21 PM

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....cleal/xions.png
stereoimages

to make the two mirror-image salts,

http://www.mazepath....cleal/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....cleal/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*

#9 UncleAl

UncleAl

    Creating

  • Members
  • 1212 posts

Posted 20 July 2006 - 11:16 AM

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.

#10 pgrmdave

pgrmdave

    Lurking

  • Members
  • 3057 posts

Posted 20 July 2006 - 02:01 PM

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

#11 UncleAl

UncleAl

    Creating

  • Members
  • 1212 posts

Posted 20 July 2006 - 04:35 PM

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.

#12 Jay-qu

Jay-qu

    Ancora Imparo

  • Members
  • 6340 posts

Posted 20 July 2006 - 07:51 PM

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

#13 Mercedes Benzene

Mercedes Benzene

    Student

  • Moderators
  • 2950 posts

Posted 20 July 2006 - 08:08 PM

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:

#14 Jay-qu

Jay-qu

    Ancora Imparo

  • Members
  • 6340 posts

Posted 20 July 2006 - 08:10 PM

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?

#15 UncleAl

UncleAl

    Creating

  • Members
  • 1212 posts

Posted 21 July 2006 - 10:14 AM

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.

#16 pgrmdave

pgrmdave

    Lurking

  • Members
  • 3057 posts

Posted 21 July 2006 - 10:27 AM

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:

#17 Jay-qu

Jay-qu

    Ancora Imparo

  • Members
  • 6340 posts

Posted 21 July 2006 - 08:20 PM

sounds like an interesting job :eek2: