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A theoretical study of the aromatic character of polyphosphaphospholes. Is the pyramidality the only factor to take into consideration?
E. M. Cabaleiro- Lago
1 ,
J. Rodríguez-Otero
2 ,
A. Peña-Gallego
* 2 ,
D. Josa
2
1  Departamento de Química Física, Facultade de Ciencias, Universidade de Santiago de Compostela, Campus de Lugo, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
2  Departamento de Química Física, Facultade de Química, Universidade de Santiago de Compostela, Avda. das Ciencias s/n. 15782, Santiago de Compostela, Spain
Published: 01 November 2009 by MDPI in The 13th International Electronic Conference on Synthetic Organic Chemistry session Computational Chemistry
https://doi.org/10.3390/ecsoc-13-00248
Abstract: A comprehensive MP2/6-311+G(d,p) and B3LYP/6-311+G(d,p) study of the aromatic character of phospholes, Pn(CH)4-nPH with n = 0-4 was conducted. For this purpose, the structures for these compounds were optimized at both theoretical levels and different magnetic properties (magnetic susceptibility, χ, magnetic susceptibility anisotropy, χanis, and the nucleus-independent chemical shifts, NICS) were evaluated. For comparison, these magnetic properties were also calculated in the optimized structures with planarity constraints. We have also applied the ACID (anisotropy of the current-induced density) method in this analysis. The main conclusions are the aromatic character of these compounds, the relationship between aromaticity and planarity and the importance of other factors in this aromaticity.
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