Structural Motifs of [Fe(CO 2 ) n ] − Clusters ( n = 3–7)
                        
                    - Award ID(s):
- 1734006
- PAR ID:
- 10057138
- Date Published:
- Journal Name:
- The Journal of Physical Chemistry A
- Volume:
- 121
- Issue:
- 21
- ISSN:
- 1089-5639
- Page Range / eLocation ID:
- 4132 to 4138
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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            The vibrational structure and binding motifs of vanadium cation-ethane clusters, V(+)(C2H6)n, for n = 1 – 4 are probed using infrared photodissociation spectroscopy in the C-H stretching region (2550 – 3100 cm-1). Comparison of spectra to scaled harmonic frequency spectra obtained using density functional theory suggest that ethane exhibits two primary binding motifs when interacting with the vanadium cation, an end-on 𝜂2 configuration and a side-on configuration. The lower-energy side-on configuration predominates in smaller clusters, but the end-on configuration becomes important for larger clusters as it helps to maintain a roughly square planar geometry about the central vanadium. Proximate C-H bonds exhibit elongation and large red-shifts when compared to bare ethane, particularly in the case of the side-on isomer, which are underestimated by scaled harmonic frequency calculations, demonstrating initial effects of C-H bond activation.more » « less
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