Related Experiment Video
Updated: Mar 30, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
Published on: July 19, 2019
Complementarity of QTAIM and ELF Partitions: Deeper Understanding of the Anomeric Effect
David Ferro-Costas1, Ricardo A Mosquera1
1Departamento de Química Física, Universidade de Vigo, Facultade de Química , Lagoas-Marcosende s/n, 36310 Vigo, Galicia, Spain.
Abstract:
In this work, fragments with chemical significance are defined inside QTAIM basins through the use of the ELF partition. In an ideal situation, core and monosynaptic ELF basins for an atom A (CA and VA, respectively) should belong exclusively to its atomic basin (CA, VA ∈ ΩA), while disynaptic ones ought to be divided between the atoms of the corresponding bond (for an A-B bond, VA-B ∈ ΩA ∪ ΩB). Several examples here analyzed verify this situation (within 0.01 au). This combined partitioning is also applied to the analysis of the conformational preference in diverse anomeric compounds. Results lead to an alternative interpretation, independent of hyperconjugative effects.
Related Concept Videos
Reaction Quotient
E1 Reaction: Stereochemistry and Regiochemistry
¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
E2 Reaction: Stereochemistry and Regiochemistry
When a substrate with two different β hydrogens undergoes an E2 elimination, the presence of a strong base can yield two regioisomeric alkenes. The more-substituted alkene is the major...
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Woodward–Hoffmann Selection Rules and Microscopic Reversibility

