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Arrange the following complex in incread...

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)]`

A

`PgtQgtRgtS`

B

`P=SgtRgtQ`

C

`S=PgtQgtR`

D

`PltQltRltS`

Text Solution

Verified by Experts

The correct Answer is:
D
The `delta`-donating ability and `pi`-acceptor ability of phosphines are inversely correlated in the sense that electron-rich phosphines, such as `PMe_(3)`, are good `delta`-donors and poor `pi`-acceptors, whereas electron poor phosphines, such as `PF_(3)`, are poor `delta`-donors and good `pi`-acceptors. Thus, `pi`-accepting tendecy order :
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GRB PUBLICATION-COORDINATION COMPOUNDS-G. Organometallic Compounds, Synergic Bonding
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  2. Which has largest C-O bond length in the given, complexes ?

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  3. In metal carbonyls, metal ligand sigma bond is formed by :

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  4. Which of the following ligand is not pi-acceptor ligand ?

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  5. Which of the following molecule has lower v(c-o) (stretching vibration...

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  6. Select the correct statement for Zeise's salt :

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  7. Which of the following has lower stretching frequency for C-O bond ?

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  8. Select the correct statement :

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  9. Arrange the following complex in increadsing order of stretching vibra...

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  10. The V-C distance in V(CO)(6)" and "[V(CO)(6)]^(-) are repectively (in ...

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  11. Identify the correct order :

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  12. Tetracyanoethylene has a formal C=C double bond length of X in the fre...

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  13. Which of the following has lower viscosity?

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  14. Which of the following species show(s) synergi bonding ?

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  15. Arrange the following compoound according to d(C-C) order : (P) C(2)...

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  16. Which of the following is ann oxidizing agent?

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  17. If H(2) molecule is acting as ligand via oxidate addition : [Ir^(I)(...

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  18. Which of the following factor is responsible for the pi character in m...

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  19. Select the incorrect statement about metal carbonyl complex compounds ...

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  20. Identify the type of bond character between Ni" and "CO lidgand in [Ni...

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