In the transition metal complex ion [Cr(C2O4)3]3−[\text{Cr}(\text{C}_2\text{O}_4)_3]^{3-}[Cr(C2O4)3]3−, which of the following options correctly identifies the donor atoms, the Lewis acid/base role of the central metal ion, and the coordination number of chromium?
The donor atoms are carbon; Cr3+\text{Cr}^{3+}Cr3+ acts as a Lewis acid; the coordination number is 3.
The donor atoms are oxygen; Cr3+\text{Cr}^{3+}Cr3+ acts as a Lewis base; the coordination number is 6.
The donor atoms are oxygen; Cr3+\text{Cr}^{3+}Cr3+ acts as a Lewis acid; the coordination number is 6.
The donor atoms are oxygen; Cr3+\text{Cr}^{3+}Cr3+ acts as a Lewis acid; the coordination number is 3.
