Sketch the structure of the complex in each of the following compounds and give the full compound name: (a) $c i s-\left[\operatorname{PtBr} \mathrm{Cl}\left(\mathrm{NO}_{2}\right)_{2}\right]^{2-}$ (b) $\left[\mathrm{Mn}(\mathrm{CO})_{3}\left(\mathrm{C}_{6} \mathrm{H}_{6}\right)\right]^{+}$ (c) $\left.c i s-\left[\mathrm{Cr} \mathrm{Cl}_{4}\right)\left(\mathrm{OH}_{2}\right)_{2}\right]^{-}$ (d) trans-[Co(OH)(en) \(\left._{2} \mathrm{Cl}\right]^{+}\)

(a) The structure of cis-\([PtBrCl(NO2)_2]^{2-}\) is square planar, with Br and Cl cis to each other, and the two NO2 groups cis to each other as well. The full name is cis-dichlorodibromidoplatinum(II). (b) The structure of \([Mn(CO)_3(C_6H_6)]^{+}\) is tetrahedral, with three carbonyl ligands and one benzene ligand surrounding the manganese center. The full name is manganese(I) tricarbonylbenzene. (c) The structure of cis-\([CrCl_4(OH_2)_2]^{-}\) is octahedral, with two aqua ligands cis to each other and two of the four chlorine ligands cis to each other as well. The full name is cis-tetrachlorodihydroxochromium(III). (d) The structure of trans-\([Co(OH)(en)_2Cl]^{+}\) is octahedral, with hydroxide and chlorine ligands trans to each other. The full name is trans-chloridohydroxobis(ethylenediamine)cobalt(III).