Question

Which one of the following complexes exhibit chirality?

• A. $\left[Cr\right(ox{)}_3{]}^3$
• B. $cis-\left[PtC{l}_2\right(en\left)\right]$
• C. $cis-\left[RhC{l}_2\right(N{H}_3{)}_4{]}^{+}$
• D. $mer-\left[Co\right(N{O}_2{)}_3\left(dien\right)]$

Answer 1

Answer: (A)

$\left[Cr\right(ox{)}_3{]}^3$

The complex $\left[Cr\right(ox{)}_3{]}^3$ contains no symmetry element and is chiral. It can be resolved into d and l form.
The complexes $cis-\left[PtC{l}_2\right(en\left)\right],cis-\left[RhC{l}_2\right(N{H}_3{)}_4{]}^{+}andmer-\left[Co\right(N{O}_2{)}_3\left(dien\right)]$ contain symmetry elements and are achiral.