Jump to content
Science Forums

School project


Recommended Posts

What grade? Make colors, grow crystals; don't piss off the War on Drugs or Homeland Severity.

 

Cobalt(III) chelated by three symmetric bidentate ligands is a stable chiral three-bladed propeller. Such complex ions are easily optically resolved. /_-(delta) is a right-handed propeller, /-(lambda) is a left-handed propeller. An almost exact structural correspondence with opposite charges is possible,

 

http://www.mazepath.com/uncleal/trisco.png

 

Imagine growing crystals of two mirror-image Co(III) salt test masses, /_-[Co(en)3] /_-[Co(ox)3] and /-[Co(en)3] /-[Co(ox)3],

 

http://www.mazepath.com/uncleal/coenox.png

 

Inorg. Syn. 6 186 (1960)

[Co(en)3](3+)

en = 1,2-diaminoethane (ethylenediamine)

 

Inorg. Syn. 8 204 (1966)

[Co(ox)3](3-)

ox = oxalate dianion

 

J. Korean Chem. Soc. 30(4) 377 (1986)

Resolved tris(ethylenediamine)cobalt(III) was used to resolve racemic tris(oxalato)cobaltate(III).

 

And the third and fourth obvious salts. BTW, don't crib the graphics and call them your own. They are incorrect[/], but subtlely so.

Link to comment
Share on other sites

  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...