What is the systematic name of ammonium bisoxalato cuprate (II)? [closed]

What is the systematic name of ammonium bisoxalato cuprate(II)?

I already tried $\ce{(NH4)2[Cu(C2O4)2]^{2+}}$ but i am uncertain if that answer is correct.

• The systematic name of ammonium bisoxalatocuprate(II) is ammonium bisoxalatocuprate(II). Where is your question? – Jan Jun 23 '17 at 0:46

Did you mean to ask "what is the chemical formula of ammonium bisoxalatocuprate(II)", yes? If so, the compound is a salt and should be chargeless. $$\ce{(NH4)2[Cu(C2O4)]}$$ This is because oxalate is -2 charged and there are two of them making a total of -4, copper is +2 charged, and 2 ammoniums make a total of +2 charge. All of these charges cancel.