Which of the following compounds can exhibit cis-trans isomerism?

A) [Fe(CO)5ONO]2+
B) [Fe(CO)3(NH3)3]3+
C) [Cu(CO)5Br]+
D) [Cr(H2O)4Br2]+
E) [Fe(NH3)6]2+

1 answer

Here is a site where you can obtain some information.
http://en.wikipedia.org/wiki/Coordination_complex
You really need to learn to do this yourself; I'm not inclined to give you all of the answers. Perhaps I can explain if you have some specific problem. Note that the internet is not conducive to drawing structures (at least not on this site).