COMEDK2023Evening ShiftChemistryCoordination CompoundsActual
Which one of the following is an incorrect statement pertaining to the properties of Coordination compounds?
Options
- AOut of cis- [ CrCl ₂( ox )₂ ]³⁻ and trans- [ CrCl ₂( ox )₂ ]³⁻ , the trans isomer is optically inactive.
- B[ Co ( NH ₃ )₅ NO ₂ ] Cl 2 exists in 2 forms, the red form and the yellow form which are linkage isomers.
- C[ Fe ( CN )₆ ]³⁻ is called a Low spin complex.
- DA square planar complex of the type Mabcd, where a, b, c and d are unidentate ligands, exhibits geometrical is
Correct answer
D. A square planar complex of the type Mabcd, where a, b, c and d are unidentate ligands, exhibits geometrical is
Step-by-step solution
(1) Correct: Trans- [CrCl₂(ox)₂]³⁻ has a plane of symmetry optically inactive. (2) Correct: [Co(NH₃)₅NO₂]Cl₂ shows linkage isomerism as NO₂^- is an ambidentate ligand (coordinates through N or O). (3) Correct: [Fe(CN)₆]³⁻ has Fe³⁺ ( d^5 ) with strong field ligand CN^- electrons pair up low spin complex. (4) Incorrect: For a square planar complex of type Mabcd, the number of geometrical isomers is 3 (not one cis and two trans forms). The classification into cis/trans is not straightforward for Mabcd type; the total