Select the correct order of `C-O` bond order in mixed phosphine carbony1 complex
(I) `[Mo(Ph_(3)P)_(3)(CO)_(3)]` (II) `[Mn(Ph_(2)PCI_(3))(CO)_(3)]` (III) `[Mo(PhCI_(2))_(3)(CO)_(3)]` .

If in the mixed carbonyl the other ligand is also pi acceptor it would compete with the ligand CO for gaining the metal d_(pi) electron charge The higher is the extent of back donation in CO , the lesser will be the stretching vibration frequency for C-O bond If PP_(3) is better pi-acceptor than CO then answer the following Select the correct order of C-O bond length in the following molecules . (I) [Mo(CO)_(3)(PF_(3))_(3)] (II) [Mo(CO)_(3)(PCI_(3))_(3)] (III) [Mo(CO)_(3)(P(Me)_(3)_(3)] (a) IgtIIgtIII (b) IIIgtIgtII (c) IIgtIIIgtI (d) IltIIltIII

If in the mixed carbonyl the other ligand is also pi acceptor it would compete with the ligand CO for gaining the metal d_(pi) electron charge The higher is the extent of back donation in CO , the lesser will be the stretching vibration frequency for C-O bond If PP_(3) is better pi-acceptor than CO then answer the following Select the correct order of C-O bond length in the following molecules . (I) [Mo(CO)_(3)(PF_(3))_(3)] (II) [Mo(CO)_(3)(PCI_(3))_(3)] (III) [Mo(CO)_(3)(P(Me)_(3)_(3)] (a) IgtIIgtIII (b) IIIgtIgtII (c) IIgtIIIgtI (d) IltIIltIII

If in the mixed carbonyl the other ligand is also pi acceptor it would compete with the ligand CO for gaining the metal d_(pi) electron charge The higher is the extent of back donation in CO , the lesser will be the stretching vibration frequency for C-O bond If PP_(3) is better pi-acceptor than CO then answer the following Select the correct order of C-O bond length in the following molecules . (I) [Mo(CO)_(3)(PF_(3))_(3)] (II) [Mo(CO)_(3)(PCI_(3))_(3)] (III) [Mo(CO)_(3)(P(Me)_(3))] (a) IgtIIgtIII (b) IIIgtIgtII (c) IIgtIIIgtI (d) IltIIltIII

The C-O bond order in CO_3^(2-) is

Arrange the following complex in increadsing order of stretching vibrational frequency of C-O bond : (P) [(PPh_(3))_(3)Mo(CO)_(3)]" "(Q) [(Ph_(2)PCl)_(3)Mo(CO)_(3)] (R )[(PhPCl_(2))_(3)Mo(CO)_(3)]" "(S) [(PCl_(3))_(3)Mo(CO)_(3)]

Select the correct order of C - O bond length in the following molecules I. [Mo(CO)_3 (PF_3)_3] II. [Mo(CO)_3 (PCl_3)_3] III. [Mo(CO)_3(P (Me)_3)_3]