How does the CO vibrational frequency change in carbonyl coordination complexes?
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The CO vibrational frequency in carbonyl coordination complexes can change due to various factors. In some cases, the conformation of the donor groups can affect the carbonyl stretching frequency . The polarization of the CO bond can also lead to a downshift in the frequency . Additionally, the presence of weakly bound CO molecules in the second coordination sphere can perturb the structure of the complex and cause redshifted CO stretching frequencies . The binding mode of the carbonyl group to the metal ion can also influence the vibrational behavior. Intermolecular H-bonding or bonding to the metal ion can result in a downshift in the CO frequency . Furthermore, the presence of mixed carbonyl dihydrogen complexes can lead to a lower CO vibrational frequency compared to stable dicarbonyl complexes .
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| Papers (5) | Insight |
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28 Citations | The paper provides a new interpretation of the CO vibrational frequency in supported Rh(I) monocarbonyl complexes, but it does not discuss how the CO vibrational frequency changes in carbonyl coordination complexes in general. |
18 Nov 2009 17 Citations | The paper discusses the vibrational behavior of the carbonyl (CO) group in coumarin coordination complexes. It states that the CO frequency can downshift due to intermolecular H-bonding or binding to the metal ion. However, it does not provide specific information on how the CO vibrational frequency changes in carbonyl coordination complexes. |
| The paper discusses how the CO stretching frequencies (ν(CO)) in [Co(CO)5]+ complexes are redshifted when weakly bound CO molecules are present in the second coordination sphere. It also analyzes the influence of different environments on the CO vibrational modes. | |
| The paper discusses a correlation between the conformation of the flanking aryl-substituted oxazoline donors and the carbonyl stretching frequency in metal carbonyl complexes. It suggests that the change in frequency is due to the internal Stark effect. | |
| The CO vibrational frequency in carbonyl coordination complexes decreases due to the increased polarization of the CO bond in the complex. This weakening of the bond is similar to the stabilization of carbocations. |
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