Synergic Bonding

Number of the following statements is/are correct? (A) Greater the stability constant of a complex ion, greater is its stability (B) Greater the oxidation state of the central metal ion, greater is the stability of the complex (C ) CO stabilises complex becuase of its synergic Bonding. (D) Chelate complexes have low stability constants

Two important physical evidences supporting the synergic bonding in non-classical complexes are bond lengths and vibrational spectra. Vibrational spectra is based on the fact that the compression and extension of a bond may be analogous to the behaviour of a spring and obeys Hook's law. overline(v)=(1)/(2pic)sqrt((k)/(mu))cm^(-1) where, k=force force constant of the bond which is directly proportional to bonnd strength of CO mu= reduced mass of ligand overline(v) =stretching frequency of the CO bond c=velocity of light Q. In which of the following ligand, sigma -bond order does not change during synergic bonding in their respective complexes:

In metal carbonyls. There is synergic bonding interaction between metal and carbon monoxide . This leads to increase in strength of metal ligand bond and decrease in bond ordeer of CO in carbony1 complex as compared to band order in order in carbon monoxide. The increases in bond length in CO as compared to carbon monoxide .is due to :

Two important physical evidences supporting the synergic bonding in non-classical complexes are bond lengths and vibrational spectra. Vibrational spectra is based on the fact that the compression and extension of a bond may be analogous to the behaviour of a spring and obeys Hook's law. overline(v)=(1)/(2pic)sqrt((k)/(mu))cm^(-1) where, k=force force constant of the bond which is directly proportional to bonnd strength of CO mu= reduced mass of ligand overline(v) =stretching frequency of the CO bond c=velocity of light Q. In Mn_(2)(CO)_(10) carbonyl complex, the d-orbital of Mn-atom which can not be involved in synergic bonding betwee Mn and CO ligands: