ONeill
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Synthesis of tantalum nitrate
Hey folks!
I´m searching for a synthesis of tantalum nitrate (Ta(NO3)x). I think x=5 is the most common version, but any other
oxidationsstate would be good, too. Any hints would be helpful, thank you in advance.
Cheers ONeill
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woelen
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In general it is not possible to make pure oxoanion salts of elements in high oxidation states. Borderline behavior is obtained for oxidation state
+3, e.g. Cr(NO3)3 and Bi(NO3)3, but there already is a tendency to formation of basic salts and mixed oxides/other anion, e.g. (BiO)NO3 or
Bi(OH)2(NO3).
For oxidation state +5 you really can forget about making pure salts, e.g. Ta(NO3)5 certainly cannot be prepared. Maybe it is possible to make
(TaO)(NO3)3 or (TaO2)(NO3), but I even doubt the existence of these.
Chlorides to exist, e.g. TaCl5 and TaOCl3, but these are purely covalent compounds and these immediately hydrolyse in water, giving Ta2O5 and HCl.
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ONeill
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Hello woelen,
thank you very much for you detailled answer.
Cheers Chris
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