Final answer:
The IUPAC name of the compound Pt(en)₂Cl₂ is diaminedichloridoplatinum(II). The compound exhibits geometric isomerism with cis and trans configurations. Both isomers are optically inactive.
Step-by-step explanation:
The IUPAC name of the compound Pt(en)₂Cl₂ is diaminedichloridoplatinum(II).
To draw the structures of geometrical isomers, we need to determine the possible arrangements of the ligands around the central platinum atom. In this case, the two ligands are the bidentate ligand ethylenediamine (en) and the chloride ion (Cl⁻).
The compound Pt(en)₂Cl₂ exhibits geometric isomerism due to the presence of two different ligands, which can arrange themselves in cis or trans configurations. The cis isomer has the same ligands on the same side of the square planar complex, while the trans isomer has the ligands on opposite sides.
The cis isomer of Pt(en)₂Cl₂ can be represented as [Pt(en)₂Cl₂]cis, and the trans isomer as [Pt(en)₂Cl₂]trans.
In terms of optical activity, both cis and trans isomers of Pt(en)₂Cl₂ are optically inactive because they lack a chiral center and do not exhibit the ability to rotate plane-polarized light.