Pseudorotation as a mechanism for intramolecular electron density transfer. Fragmentation of the octafluoronaphthalene radical anion

被引：9

作者：

Beregovaya, Irina V. ^{[1
]}

Shchegoleva, Lyudmila N. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Div, NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk 630090, Russia

来源：

JOURNAL OF FLUORINE CHEMISTRY | 2014年 / 163卷

关键词：

Quantum-chemical calculations; Avoided crossing; Pseudorotation; Reductive dehalogenation of polyfluoroarenes; Reaction mechanism; POTENTIAL-ENERGY SURFACE;

D O I：

10.1016/j.jfluchem.2014.03.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Adiabatic potential energy surface (PES) of the octafluoronaphthalene radical anion (RA) has been investigated with the B3LYP/6-31 + G* calculations for the gas phase and polar media. In spite of the low symmetry of the RA its PES has been found to be the surface of pseudorotation. The pseudorotation is a way of intramolecular electron density transfer and so played the key role in regioselectivity of the RA fragmentation through the fluoride ion elimination. Transition states for alpha and beta C-F bond cleavage in the polar solvent were located. The noticeably lower energy barrier for the beta C-F bond cleavage explains the observed regioselectivity of the octafluoronaphthalene reductive defluorination. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6