Which of the following coordination compounds would exhibit optical is...
The optical isomers are pair of molecules which are non super imposable mirror images of each other
The two optically active isomers are collectivity called enantiomers.
View all questions of this test
Which of the following coordination compounds would exhibit optical is...
Explanation:
Optical isomerism:
Optical isomerism is a type of stereoisomerism where two compounds have the same molecular formula and connectivity but differ in the spatial arrangement of their atoms. Optical isomers, also known as enantiomers, are non-superimposable mirror images of each other and rotate the plane of polarized light in opposite directions.
Coordination compounds:
Coordination compounds are molecules that consist of a central metal ion or atom coordinated to one or more ligands. Ligands are molecules or ions that donate a pair of electrons to the metal ion to form coordination bonds.
Pentamminenitrocobalt(III) iodide:
- This compound has the formula [Co(NH3)5(NO2)]I3.
- It contains a cobalt(III) ion coordinated to five ammonia ligands and one nitro ligand.
- The compound does not have any chiral centers and therefore cannot exhibit optical isomerism.
Diamminedichloroplatinum(II):
- This compound has the formula [Pt(NH3)2Cl2].
- It contains a platinum(II) ion coordinated to two ammonia ligands and two chloride ligands.
- The compound does not have any chiral centers and therefore cannot exhibit optical isomerism.
Trans-dicyanobis(ethylenediamine)chromium(III) chloride:
- This compound has the formula [Cr(NH2CH2CH2NH2)2(CN)2]Cl.
- It contains a chromium(III) ion coordinated to two ethylenediamine (en) ligands, two cyanide (CN-) ligands, and one chloride ligand.
- The compound does not have any chiral centers and therefore cannot exhibit optical isomerism.
Tris(ethylenediamine)cobalt(III)bromide:
- This compound has the formula [Co(NH2CH2CH2NH2)3]Br3.
- It contains a cobalt(III) ion coordinated to three ethylenediamine (en) ligands.
- The compound has one chiral center at the cobalt atom, giving rise to two possible configurations: Δ and Λ.
- These configurations are non-superimposable mirror images of each other, making the compound optically active and capable of exhibiting optical isomerism.
Conclusion:
Out of the given coordination compounds, only tris(ethylenediamine)cobalt(III)bromide exhibits optical isomerism due to the presence of a chiral center at the cobalt atom.