How may copper acetate ligands be manipulated to change colors?
I may have accidentally created copper cloride in addition to the copper acetate. I decided to just let the solution (made form Copper, vinegar, and salt) evaporate with a small fan speeding the evaporation for the last few weeks. The tallest copper acetate crystals started breaking the surface and then the surface of the liquid started to form a skin (pic 1) so I poured off the now green liquid into another jar. Copper acetate is blue, which is why the green solution seems to suggest that there is copper cloride. 


Evaporation! Note the blue-green layer of copper carbonate below the dark copper acetate crystals. 



Top View



The green liquid on the left is what was left from evaporation (and I think is copper chloride) - next to another jar of copper acetate. 



The copper acetate crystals were covered in a thin layer of copper carbonate because last week I disturbed the solution and stirred up a cloud of copper carbonate accidantally. I rinsed them with vinegar and they cleaned nicely. 



The largest crystal was just over 1 cm wide. These crystals were grown from a solution that started evaporating 5 years ago. 



The copper carbonate goo in the bottom needed a use so I added more vinegar to it and it formed the copper acetate solution three pictures up (next to the green copper chloride).