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Updated: Jun 26, 2026

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
Published on: May 26, 2019
Multiple bonding in the chromium dimer supported by two diazadiene ligands
1Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA. d.dupre@louisville.edu
Abstract:
Analysis of the topology and delocalization of the electron density with the quantum theory of atoms in molecules (QTAIM) shows that the Cr(2) dimer when supported by two diazadiene ligands has a degree of bonding of 3.6--slightly less than that of a formal quadruple bond. The metal-ligand complex is held together by relatively weak dative bonds. Out-of-plane lone-pair-like charge concentrations on the nitrogen atoms are oriented so as to maximally avoid areas of charge concentration in the distorted inner-valence shell of the chromium atoms.
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