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https://repositorio.ufba.br/handle/ri/6424
metadata.dc.type: | Artigo de Periódico |
Title: | Lewis Acid-Base Interactions in Weakly Bound Formaldehyde Complexes with CO2, HCN, and FCN: Considerations on the Cooperative H-Bonding Effects |
Other Titles: | Journal of Physical Chemistry A |
Authors: | Rivelino, Roberto |
metadata.dc.creator: | Rivelino, Roberto |
Abstract: | Ab initio quantum chemistry calculations reveal that HCN and mainly FCN can form Lewis acid−base complexes with formaldehyde associated with cooperative H bonds, as first noticed by Wallen et al. (Blatchford, M. A.; Raveendran, P.; Wallen, S. L. J. Am. Chem. Soc. 2002, 124, 14818−14819) for CO2-philic materials under supercritical conditions. The present results, obtained with MP2(Full)/aug-cc-pVDZ calculations, show that the degeneracy of the ν2 mode in free HCN or FCN is removed upon complexation in the same fashion as that of CO2. The splitting of these bands along with the electron structure analysis provides substantial evidence of the interaction of electron lone pairs of the carbonyl oxygen with the electron-deficient carbon atom of the cyanides. Also, this work investigates the role of H bonds acting as additional stabilizing interactions in the complexes by performing the energetic and geometric characterization. |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/6424 |
Issue Date: | 2008 |
Appears in Collections: | Artigo Publicado em Periódico (FIS) |
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C__Documents and Settings_rep...t.default_Cache_D_B9_B20F8d01.pdf Restricted Access | 240,94 kB | Adobe PDF | View/Open Request a copy |
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