Inquiry of the electron density transfers in chemical Q1 Q2 reactions: a complete reaction path for the denitrogenation process of 2,3-diazabicyclo- [2.2.1]hept-2-ene derivatives
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Other documents of the author: Safont Villarreal, Vicent Sixte; González-Navarrete, Patricio; Oliva, Mónica; Andres, Juan
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Title
Inquiry of the electron density transfers in chemical Q1 Q2 reactions: a complete reaction path for the denitrogenation process of 2,3-diazabicyclo- [2.2.1]hept-2-ene derivativesAuthor (s)
Date
2015Publisher
Royal Society of ChemistryISSN
1463-9084; 1463-9076Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
A detailed study on all stages associated with the reaction mechanisms for the denitrogenation of
2,3-diazabicyclo[2.2.1]hept-2-ene derivatives (DBX, with X substituents at the methano-bridge carbon atom,
X = H and ... [+]
A detailed study on all stages associated with the reaction mechanisms for the denitrogenation of
2,3-diazabicyclo[2.2.1]hept-2-ene derivatives (DBX, with X substituents at the methano-bridge carbon atom,
X = H and OH) is presented. In particular, we have characterized the processes leading to cycloalkene
derivatives through migration-type mechanisms as well as the processes leading to cyclopentil-1,3-diradical
species along concerted or stepwise pathways. The reaction mechanisms have been further analysed within
the bonding evolution theory framework at B3LYP and M05-2X/6-311+G(2d,p) levels of theory. Analysis of
the results allows us to obtain the intimate electronic mechanism for the studied processes, providing a new
topological picture of processes underlying the correlation between the experimental measurements
obtained by few-optical-cycle visible pulse radiation and the quantum topological analysis of the electron
localization function (ELF) in terms of breaking/forming processes along this chemical rearrangement. The
evolution of the population of the disynaptic basin V(N1,N2) can be related to the experimental observation
associated with the NQN stretching mode evolution, relative to the N2 release, along the reaction process.
This result allows us to determine why the N2 release is easier for the DBH case via a concerted mechanism
compared to the stepwise mechanism found in the DBOH system. This holds the key to unprecedented
insight into the mapping of the electrons making/breaking the bonds while the bonds change. [-]
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Phys. Chem. Chem. Phys., 2015, 17, 32358Rights
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