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J Phys Chem A. 2016 Jun 16;120(23):4059-70. doi: 10.1021/acs.jpca.6b03787. Epub 2016 Jun 07.

Experimental and Theoretical Electron Density Determination for Two Norbornene Derivatives: Topological Analysis Provides Insights on Reactivity.

The journal of physical chemistry. A

Christopher G Gianopoulos, Bartosz Zarychta, Simone Cenedese, Vladimir V Zhurov, A Alan Pinkerton

Affiliations

  1. Department of Chemistry, School of Green Chemistry and Engineering, The University of Toledo , Toledo, Ohio 43606-3390, United States.
  2. Department of Chemistry, Opole University , ul. Oleska 48, 45-052 Opole, Poland.

PMID: 27232652 DOI: 10.1021/acs.jpca.6b03787

Abstract

The electron density distribution of two substituted norbornene derivatives (cis-5-norbornene-endo-2,3-dicarboxylic anhydride (1) and 7-oxabicylo[2.2.1]hept-5-ene-exo-2,3-dicarboxylic anhydride (2) has been determined from low-temperature (20 K) X-ray diffraction data and from DFT calculations with periodic boundary conditions. Topological analysis of the electron density is discussed with respect to exo-selective additions, the partial retro-Diels-Alder (rDA) character of the ground state, and intermolecular interaction energies.

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