Complete the exercises below. Determine if each of the following metal complexes is chiral and therefore has an optical isomer: a. square planar [Pd(en)(CN)₂].

Chirality refers to the geometric property of a molecule that makes it non-superimposable on its mirror image, much like left and right hands. A chiral molecule typically has at least one chiral center, often a carbon atom bonded to four different substituents. In coordination chemistry, chirality can arise from the arrangement of ligands around a central metal atom, leading to distinct optical isomers.

Coordination geometry describes the spatial arrangement of ligands around a central metal ion in a complex. Common geometries include octahedral, tetrahedral, and square planar. The geometry influences the symmetry of the complex, which is crucial for determining whether the complex can exist as chiral isomers.

Optical isomerism is a form of stereoisomerism where isomers differ in the way they rotate plane-polarized light. Chiral compounds can exist as two enantiomers, which are mirror images of each other and have different optical activities. The presence of optical isomers is significant in many fields, including pharmaceuticals, where different enantiomers can have different biological effects.