Coordination CompoundHard
Question
Which of the following statements is correct with respect to the metal carbonyls of Ist transition series?
Options
A.As M - Cπ bonding increases, the C - O bond length increases.
B.As positive charge on the central metal atom increases, the C - O bond length increases.
C.As electron density on the central metal atom increases, the C - O bond length increases.
D.(A) and (C) both.
Solution
Order of C - O bond strength :
[Mn(CO)6]+ > [Cr(CO)6] > [V(CO)6]- > [Ti(CO)6]2- and [Ni(CO)4] > [Co(CO)4]- > [Fe(CO)4]2-.
(A) True statement.
(B) As + ve charge on the central metal atom increases, the less readily the metal can donate electron density into the π* orbitals of CO ligand to weaken the C - O bond.
(C) In the carbonylate anions, the metal has a greater electron density to be dispersed, with the result that M - Cπ bonding is enhanced and the C - O bond is diminished in strength.
[Mn(CO)6]+ > [Cr(CO)6] > [V(CO)6]- > [Ti(CO)6]2- and [Ni(CO)4] > [Co(CO)4]- > [Fe(CO)4]2-.
(A) True statement.
(B) As + ve charge on the central metal atom increases, the less readily the metal can donate electron density into the π* orbitals of CO ligand to weaken the C - O bond.
(C) In the carbonylate anions, the metal has a greater electron density to be dispersed, with the result that M - Cπ bonding is enhanced and the C - O bond is diminished in strength.
Create a free account to view solution
View Solution FreeMore Coordination Compound Questions
The two compounds [Co(SO4)(NH3)5]Br and [Co(SO4)(NH3)5 ]Cl represent:...Each of the following obey Sidgwick effective atomic number rule except...Which statement(s) about co-ordination number of a cation is/are true ?...All the metal ions contains t2g 6eg0 configurations. Which of the following complex will be paramagnetic?...Which one of the following forms, with an excess of CN- (cyanide), a complex having coordination number two ?...