# Question #7520f

1. The silver ammine complex is linear, and cannot support isomerism. 2. 4. Likewise ${\left[C o {\left(N {H}_{3}\right)}_{5} N {O}_{2}\right]}^{2 +}$, and ${\left[C o {\left(N {H}_{3}\right)}_{5} C l\right]}^{2 +}$, are octahedral ($\left[M {L}_{5} X\right]$) with no isomerism possible. 3. A square planar platinum(II) complex, i.e. $M {L}_{2} {X}_{2}$, would normally support $c i s$$/$$t r a n s$ isomerism, however, here the ligand is ethylenediamine, a chelating ligand that must coordinate in a $c i s$ fashion, so only the $c i s$ isomer is possible.
Would ${\left[C o {\left(N {H}_{3}\right)}_{4} C {l}_{2}\right]}^{+}$ support isomerism? Why or why not?
Edited to add, ${\left[C o {\left(N {H}_{3}\right)}_{5} N {O}_{2}\right]}^{2 +}$, could possibly support linkage isomerism, should the nitro ligand coordinate through the $N$ OR the $O$ donor. This is an undergraduate treatment, and unsuitable for A level.