[Plumbum]

I am supposed to draw all possible isomers of [CoCl2(en)2]3+

I can only think of s configurational isomer such as cis/trans .. The other isomers don't fit here in my opinion. Can anyone help?

[Dan]

What types of stereoisomerism do you know?

[Plumbum]

Inosisation isomer
Hydration isomer
Coordination isomer
And I don't know the translation but the isomer where the binding is different like with NO2  Or cn

For me none of them apply to the example

[Dan]

OK, but focus on stereochemistry - ie same atom connectivity but different spatial arrangement.

What types of stereoisomers do you know about?

[Plumbum]

Enantiomer and diastereomer

You distinguish between cis and trans and an octaeder also has fac or mer.

A Tetrahedra doesn't have cis or trans.

Do you mean that?

[Dan]

Yes. Are any of the isomers you have identified chiral?

[Plumbum]

Oh yeah! I forgot to mention enantioners are chiral. Diastereomer are not.

[sjb]

Oh yeah! I forgot to mention enantioners are chiral. Diastereomer are not.

Are you sure?

[Plumbum]

I thought I am sure my professor told us so

[Dan]

I thought I am sure my professor told us so

Unlikely, it is not necessarily true - you should look up the definitions.

Back to the specific question you asked - draw out the isomers of CoCl₂(en)₂ you can think of (this is cis and trans right?).

Are either of those chiral?