Comment on "The Nature of the Fourth Bond in the Ground State of C2: The Quadruple Bond Conundrum".
Is it time to reconsider the whole concept of quadruple bonding? Contrary to the conclusion of Shaik and co-workers in Chem. Eur. J.­ 2014, 20, 6220–6232, there is no “deviation of C2 from the Badger Rule”.
Technische Universität Braunschweig, Institut für Organische Chemie, Hagenring 30, 38106 Braunschweig (Germany). joerg.Grunenberg@tu-bs.de.
Jörg
J
Grunenberg
C2; bond order; bonding; force constants; valence bond