Complex Ion Chemistry: NH3 + Copper 2

AI Thread Summary
The discussion revolves around the complexities of ion chemistry, specifically the formation of copper-ammonia complexes and their associated color changes. There is confusion regarding the correct structure of the complex formed when ammonia (NH3) interacts with copper(II) ions, with some sources suggesting the formation of Cu(NH3)4 and others indicating the inclusion of two water molecules, resulting in a complex like Cu(NH3)4(H2O)2. The consensus leans towards the latter structure being accurate in an aqueous environment. Additionally, the conversation highlights the need for reliable online resources for further information on complex ion chemistry, with one user sharing a link to Chemguide as a helpful source.
scott_alexsk
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Hello,

I have been searching for sites recently on complex ion chemistry and I have found a few good hits, but sometimes it seems the authors are vague as to the actual complex formed, and which complex actually causes the color change. For example for NH3 mixed with Copper 2, one source says that Cu (NH3)4 is formed while another throws on 2 H20s. Which is correct?

-scott
 
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I believe that the structure with the two water molecules is correct, assuming that the complex was formed in an aqueous environment.
 
Thanks, for that, but do you know any good online sources. I have already found a few good sites, but I would like to familiarize myself with as much information as possible.

-scott
 
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