Name the type of isomerism exhibited and draw isomers:
(I) [Co(NH3)6][Cr(CN)6]
(II) [Co(en)3]3+
(III) [Co(NH3)3(NO2)3]
Name the type of isomerism exhibited and draw isomers:
(I) [Co(NH3)6][Cr(CN)6]
Solution: This shows ionization isomerism.
Isomer: [Co(CN)6][Cr(NH3)6]
(II) [Co(en)3]3+
Solution: This shows optical isomerism due to chirality from en ligands.
Isomers: d- and l- forms (non-superimposable mirror images).
(III) [Co(NH3)3(NO2)3]
Solution: This compound exhibits geometrical isomerism, as the arrangement of ligands around the metal ion can vary. The two possible isomers are cis- and trans- configurations.
The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.
What is crystal field splitting energy?
The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.
On the basis of CFT, explain why [Ti(H$_2$O)$_6$]Cl$_3$ complex is coloured? What happens on heating the complex [Ti(H$_2$O)$_6$]Cl$_3$? Give reason.
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