Chemistry - Coordination Chemistry Question with Solution | TestHub
Find the number of property(ies) does not change when all the 'en' ligands in are replaced by 'gly ' ligand without changing oxidation state and co-ordination number of central metal ion.
(I) (splitting energy) (II) EAN value
(III) Number of Geometrical isomers (IV) Number of Optical isomers
(V) Number of Stereoisomers (VI) Magnetic moment
(VII ) Number of 'd' orbital participate in hybridisation
Answer:
Solution:
(II) EAN value: Both complexes have the same Effective Atomic Number of 36 () because the oxidation state and coordination number remain constant.
(VI) Magnetic moment: Both are d⁶ low-spin complexes with no unpaired electrons (), so the magnetic moment remains zero.
(VII) d-orbitals in hybridization: Both form octahedral inner-orbital complexes using two d-orbitals for d²sp³ hybridization.
The other properties change because 'en' is a symmetrical bidentate ligand (AA type), while 'gly' is unsymmetrical (AB type), which introduces geometrical isomerism (fac/mer) and changes the total count of optical and stereoisomers. Additionally, the splitting energy () changes because the donor atoms switch from N,N to N,O.