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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: polexia on November 19, 2014, 06:44:07 AM

Title: The stability of transition metal complexes
Post by: polexia on November 19, 2014, 06:44:07 AM

Hey there... I have a couple of queries about stability of transition metal complexes. I've been scouring the textbook and the internet but I'm not getting any closer to finding the answers, I'm not sure if I'm missing something really simple...

- Compare the stability of NH₃ and ethylenediamine (en) complex ion of Ni²⁺ and with Co²⁺
-- for this I currently can only suggest that en will be a more stable complex with both metals because it's bidentate, it's also a stronger ligand on the spectrochemical series...

--Compare the stability of NH₃ and en complex ion of Co³⁺ and Co²⁺
--Larger electrostatic attration with Co³⁺? .. although both ligands are neutral

--Which of the following complex ions is most stable?
Cu(NH₃)₄²⁺ or Co(NH³)₆²⁺

Cu(tar)₃^4- or Co(tar)₃^4-

Any help would be greatly appreciated, thanks!