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April 21 2012 7 21 /04 /April /2012 13:26

This page will detail all of the ammine complexes that can be formed with various metals.


Copper(II): Copper(II) ammine complex  shows more information about this complex. This complex may be dried after being washed with an organic solvent, forming an extremely dark crystalline mass that tends to turn whitish in air. I have never done this without hydrolysis to insoluble copper hydroxide.


 Chromium(III): Chromium forms an ammine complex as well. It forms when chromium(III) chloride is reacted with excess ammonia.



Cobalt(III): Cobalt(II) forms several ammine complexes which easily oxidize in air to cobalt(III). I have yet to make some of these.


Nickel(II): Nickel(II) forms an ammine complex when nickel(II) chloride is reacted with excess ammonia. It is much bluer than other nickel solutions.



Silver(I): Silver forms a colorless ammine complex when silver chloride, oxide, carbonate, or nitrate is dissolved in ammonia. Upon standing, it can precipitate dangerously explosive silver nitride. It was used in the past to make silver mirrors by reacting with KOH and glucose.


Zinc: Zinc forms a colorless ammine complex when zinc hydroxide reacts with excess ammonia.

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Andy 05/31/2015 23:54

@Sachin Well, I don't know any method either, but why not try it via a known compound?
There are three I know of...
- Tetraamminezinc sulphate [Zn(NH3)4][SO4]
- Tetraamminezinc dinitrate [Zn(NH3)4][NO3]2
- Tetraamminezinc bis-tetrafluoroborate [Zn(NH3)4][BF4]2

Sachin 04/30/2015 08:52

May I please know whether there is any method or process to extract zinc ammine complex formed in excess ammonia solution?