[khwcm]

so i was just looking at this
http://woelen.homescience.net/science/chem/exps/fluorescent_copper/index.html
but i dont have pyridine, so i decided to use ammonia instead of it.

I got a blue precipitate at first, and i remove the excess liquid, it turn deep green, with abit brown later..

so can anyone tell me whats going on and what is it?
PS: i didnt got a ultraviolet light ...so i didnt know whether it is a fluorescent complex (or even it is not a complex)

[SirRoderick]

Pyridine is nothing like ammonia, why did you do that?

*nevermind this part, wasn't accurate*

Turns out I can't remember. A lot of copper solutions are blue and green 

[khwcm]

i am just so free to find various chemical try and see what are the out come. i tried oxalate ion and phenol but no observible change, while ammonia give a green precipitate(not solution indeed)..
thanks for your reply 

[SirRoderick]

Try this link.

http://www.chemguide.co.uk/inorganic/transition/copper.html

[khwcm]

so do u mean thats [Cu(NH3)2]+ ?