1. The problem statement, all variables and given/known data In lab we synthesised cis and trans copper glycine and we have to use IR to differentiate the two so we have to figure out the number of IR active vibrations for each complex. It's been a year since I did anything with point groups so I'm not sure if I did it right. 2. Relevant equations the point group for cis-copper glycine is C2V 3. The attempt at a solution http://[URL=http://s350.photobucket.com/user/remerril/media/hs%20blackfff_zpsexbt6f6c.png.html][PLAIN]http://i350.photobucket.com/albums/q422/remerril/hs%20blackfff_zpsexbt6f6c.png [Broken][PLAIN]http://i350.photobucket.com/albums/q422/remerril/hs%20blackfff_zpsexbt6f6c.png[/URL] [Broken] http://s350.photobucket.com/user/remerril/media/hs blackfff_zpsexbt6f6c.png.html?filters[user]=146245371&filters[recent]=1&sort=1&o=0 Here's my attempt at the solution. I'm not confident I did it right at all because I've never seen numbers that high. Water has the same symmetry but only 3 active vibrations. Then again I've never done this on a molecule this large.