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Which of the following has highest stretching vibrational frequency for C–O bond (1) [Fe(CO)4]–2 (2) [Co(CO)4]- (3) [Ni(CO)4] (4) [Cu(CO)4]+

 
Which of the following has highest stretching
vibrational frequency for C–O bond
(1) [Fe(CO)4]–2     (2) [Co(CO)4]-                                              (3) [Ni(CO)4]     (4) [Cu(CO)4]+

Grade:12th pass

1 Answers

Avni Chauhan
askIITians Faculty 247 Points
5 years ago
The electrons from the metal are shifted in the antibonding orbitals of CO. Thus, reducing the stretching frequency. Higher is the negative charge on the metal atom, lower the frequency.
therefore, (D) is the correct answer

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