An electronic properties investigation to interpret the substituent constants of monosubstituted benzene derivatives.

Clicks: 197
ID: 13531
2019
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Abstract
In the present work, the π and π-electronic nature of substitution constants (σ) of the twenty-two monosubstituted benzene derivatives (MSBDs) are estimated in terms of the para-delocalization index (PDI) and total non-Lewis structure (TNLS), respectively. Since these compounds are aromatic, the other descriptors of aromaticity such as nuclear independent chemical shifts and aromatic stabilization energy have been examined. Because of no considerable variation for the π and π-electron delocalization in the ring systems, a very weak correlation has been demonstrated between all aromaticity indices. Also, none of these descriptors has a linear correlation with the values of σ for both electron-donating groups (EDGs) and electron-withdrawing groups (EWGs) in a simultaneous relationship. We now propose the usage of the dipole moments values of molecules, considering their directions, by multiplying the PDI and TNLS values as probes to interpret σ values for benzene and MSBDs since the dipole moment can affect the π and π-electron delocalization. It is interesting to note that there is a remarkable linear correlation between our suggested probes, ±μPDI and ±μTNLS, and σ, σ, and σ/σ for EDGs and EWGs in simultaneous linear relationships. Also, these probes have a relative relationship with Kirkwood and Westheimer equation. Additionally, the regression coefficient between ±μPDI and ±μTNLS is 0.989.
Reference Key
manassir2019anjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Manassir, Mohammad;Pakiari, Ali H;
Journal journal of molecular graphics & modelling
Year 2019
DOI
S1093-3263(19)30365-1
URL
Keywords Keywords not found

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