Consider the following metal complexes:
[Co(NH3)6]3+
[CoCl(NH3)5]2+
[Co(CN)6]3–
[Co(NH3)5(H2O)]3+
The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is _______ B.M. (Nearest integer)
Consider the following metal complexes:
[Co(NH3)6]3+
[CoCl(NH3)5]2+
[Co(CN)6]3–
[Co(NH3)5(H2O)]3+
The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is _______ B.M. (Nearest integer)
Correct Answer: 0
Solution and Explanation
In all complexes, Co is present in the +3 oxidation state and all complexes are low spin or inner orbital complex.
The stronger the ligand, the higher the crystal field splitting.
So, the order of crystal field splitting is
[Co(CN)6]3– > [Co(NH3)6]3+> [Co(NH3)5(H2O)]3+ > [CoCl(NH3)5]2+.
The shortest wavelength is shown by the complex having maximum crystal field splitting.
spin magnetic moment=\(\sqrt{0(0+2)}\)=0 BM
Top Questions on coordination compounds
- PCl$_3$, 2KCl does not give precipitate of AgCl with AgNO$_3$ solution. Write the structural formula and IUPAC name of the complex.
- CBSE CLASS XII - 2025
- Chemistry
- coordination compounds
- The IUPAC name of complex compound [Co(NH$_3$)$_6$]Cl$_3$ is
- Bihar Board XII - 2025
- Chemistry
- coordination compounds
- Which of the following compounds can be coloured?
- Bihar Board XII - 2025
- Chemistry
- coordination compounds
- Match each complex to its geometry:
- AIIMS Paramedical - 2025
- Chemistry
- coordination compounds
- Which ligand is stronger based on the spectrochemical series?
- AIIMS Paramedical - 2025
- Chemistry
- coordination compounds
Questions Asked in JEE Main exam
- For a reaction, $$ {N}_2{O}_5(g) \rightarrow 2{NO}_2(g) + \frac{1}{2} {O}_2(g) $$ in a constant volume container, no products were present initially. The final pressure of the system when 50% of the reaction gets completed is:
- JEE Main - 2025
- Chemical Reactions
- If the image of the point $ P(1, 0, 3) $ in the line joining the points $ A(4, 7, 1) $ and $ B(3, 5, 3) $ is $ Q(\alpha, \beta, \gamma) $, then $ \alpha + \beta + \gamma $ is equal to:
- JEE Main - 2025
- 3D Geometry
Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with
\(K_4\)[Fe(CN)\(_6\)] is : \[ {Cu}^{2+}, \, {Fe}^{3+}, \, {Ba}^{2+}, \, {Ca}^{2+}, \, {NH}_4^+, \, {Mg}^{2+}, \, {Zn}^{2+} \]- JEE Main - 2025
- Qualitative Analysis
A solution of aluminium chloride is electrolyzed for 30 minutes using a current of 2A. The amount of the aluminium deposited at the cathode is _________
- JEE Main - 2025
- Electrolysis
If \( z \) is a complex number and \( k \in \mathbb{R} \), such that \( |z| = 1 \), \[ \frac{2 + k^2 z}{k + \overline{z}} = kz, \] then the maximum distance from \( k + i k^2 \) to the circle \( |z - (1 + 2i)| = 1 \) is:
- JEE Main - 2025
- Complex numbers
Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.