1 Coordination Compounds
Select the correct order of C-O bond order in mixed phosphine carbonyl complex : 1) $$[(Ph_3P)_3Mo(CO)_3] > [(Ph_2PCl)_3Mo(CO)_3] < (PhPCl_2)_3 Mo (CO)_3]$$ 2) $$[(Ph_3P)_3Mo(CO)_3] > [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$ 3) $$[(Ph_3P)_3Mo(CO)_3] = [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$ 4) $$[(Ph_3P)_3Mo(CO)_3] < [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$
As phenyl group increases, resonance increases and bond length increases so order is $$[(Ph_3P)_3Mo(CO)_3] > [(Ph_2PCl)_3Mo(CO)_3] < (PhPCl_2)_3 Mo (CO)_3]$$
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