ABSTRACT
The field of coordination chemistry began with Alfred Werner. He noticed that there were different compounds that were only composed of cobalt (III) chloride and ammonia. He noted that it was very hard to remove the ammonia from the compound. He also noticed that adding the same amount of silver nitrate to the different compounds produced different amounts of silver chloride. This suggested that the cobalt and ammonia formed some sort of charged complex with the chloride, and different complexes had different charges. Those complexes would form bonds that were strong enough to keep the complexed chloride from forming silver chloride.
