Number of complexes which will exhibit synergic bonding amongst, \([Cr(CO)_6]\), \([Mn(CO)_5]\) and \([Mn_2(CO)_{10}]\) is ________.
Correct Answer: 3
Solution and Explanation
In the given complexes:
- \([Cr(CO)_6]\) - Chromium hexacarbonyl
- \([Mn(CO)_5]\) - Manganese pentacarbonyl
- \([Mn_2(CO)_{10}]\) - Dimanganese decacarbonyl
Let's analyze each complex:
\([Cr(CO)_6]:\) Chromium is in the +2 oxidation state, and it has d6 electron configuration. It can exhibit synergic bonding due to back-bonding.
\([Mn(CO)_5]:\) Manganese is in the +1 oxidation state, and it has d7 electron configuration. It can exhibit synergic bonding due to back-bonding.
\([Mn_2(CO)_{10}]:\) Manganese is in the +1 oxidation state here as well. The molecule contains a manganese-manganese bond, and each manganese can exhibit synergic bonding with the surrounding CO ligands.
All three complexes are likely to exhibit synergic bonding. CO ligand shows synergic bonding, so all complexes can show synergic bonding.
Therefore, the number of complexes that will exhibit synergic bonding is 3.
Top Questions on Bonding in Metal Carbonyls
In the following species, how many species have the same magnetic moment?
(i) Cr\(^{2+}\)
(ii) Mn\(^{3+}\)
(iii) Ni\(^{2+}\)
(iv) Sc\(^{2+}\)
(v) Zn\(^{2+}\)
(vi) V\(^{3+}\)
(vii) Ti\(^{4+}\)
- BITSAT - 2024
- Chemistry
- Bonding in Metal Carbonyls
- Which one of the following is an important component of chlorophyll?
- COMEDK UGET - 2023
- Chemistry
- Bonding in Metal Carbonyls
- A volatile compound is formed by carbon monoxide and
- COMEDK UGET - 2023
- Chemistry
- Bonding in Metal Carbonyls
- Bonds present in Nitrogen molecule are
- AP POLYCET - 2023
- Chemistry
- Bonding in Metal Carbonyls
- Which of the following molecules has a triple bond?
- TS POLYCET - 2023
- Chemistry
- Bonding in Metal Carbonyls
Questions Asked in JEE Main exam
- A force of 49 N acts tangentially at the highest point of a sphere (solid of mass 20 kg) kept on a rough horizontal plane. If the sphere rolls without slipping, then the acceleration of the center of the sphere is:
- JEE Main - 2025
- Quantum Mechanics
Let \( A = \{-3, -2, -1, 0, 1, 2, 3\} \). A relation \( R \) is defined such that \( xRy \) if \( y = \max(x, 1) \). The number of elements required to make it reflexive is \( l \), the number of elements required to make it symmetric is \( m \), and the number of elements in the relation \( R \) is \( n \). Then the value of \( l + m + n \) is equal to:
- JEE Main - 2025
- Sets and Relations
For hydrogen-like species, which of the following graphs provides the most appropriate representation of \( E \) vs \( Z \) plot for a constant \( n \)?
[E : Energy of the stationary state, Z : atomic number, n = principal quantum number]- JEE Main - 2025
- Hydrogen
- Concentrated nitric acid is labelled as 75%by mass. The volume in mL of the solution which contains 30 g of nitric acid is: Given: Density of nitric acid solution is 1.25 g/mL.
- JEE Main - 2025
- Solutions
The number of 6-letter words, with or without meaning, that can be formed using the letters of the word MATHS such that any letter that appears in the word must appear at least twice, is $ 4 \_\_\_\_\_$.
- JEE Main - 2025
- permutations and combinations
JEE Main Notification
Concepts Used:
Bonding in Metal Carbonyls
The metal-carbon bond possesses both the σ and π character in a metal carbonyl. The synergic effect produced by the metal-ligand bond strengthens the bond between the carbonyl molecule and the metal. The types of bonding that exist in metal carbonyls are as follows:
Structure of Metal Carbonyls:
- Due to the donation of electrons by the carbonyl molecules to the vacant orbitals of the metal, a metal-carbon σ bond is formed.
- Due to the donation of a pair of electrons from a filled d orbital metal into the vacant anti bonding π orbital of carbonyl ligand, a metal-carbon π bond is formed.
Stability of Coordination Compounds:
They are found to dissociate in various solutions. The stability of a coordination compound in a solution mainly depends on the degree of association between the two species involved in the state of equilibrium. For the formation of the compound quantitatively the stability of any complex is given by the magnitude of the equilibrium constant. For instance,
A + 4B→ AB4