Paradigms and Paradoxes: Accidental Degeneracies, I: Suppose the 2s and 2p Orbitals Were Closer in Energy. How Would Organic Chemistry Be Different?

Structural Chemistry

Volumn 14, Issue 4, 2003, Pages 417-419

  Perks, H Mark ^a   Liebman, Joel F ^a  

^a UNIVERSITY OF MARYLAND   (United States)

Author keywords

Carbenes; Carbon allotropes; Carbon carbon quadruple bond; Ethylenedione; Orbital degeneracy; Triplet ground states

Indexed keywords

AROMATIC COMPOUND; CARBENOID; CARBON; TRANSITION ELEMENT;

ARTICLE; CHEMICAL BOND; CHEMICAL STRUCTURE; ENERGY TRANSFER; KINETICS; MATHEMATICAL ANALYSIS; ORGANIC CHEMISTRY; QUANTUM CHEMISTRY; STRUCTURE ANALYSIS;

EID: 1642578248     PISSN: 10400400     EISSN: None     Source Type: Journal    
DOI: 10.1023/A:1024410229577     Document Type: Article

References (7)

1. Moore, C. E. Ionization Potentials and Ionization Limits Derived from the Analyses of Optical Spectra; Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.): 1970; NSRDS-NBS 34.
2. While many texts point out that the energy of a hydrogen atom depends only on n and not s, p, etc. the term "accidental degeneracy" is not found. However, in a book by Atkins, P. W. (Molecular Quantum Mechanics; 2nd edn.; Oxford University Press: Oxford, 1980), this phenomenon is cited and partially explained in terms of higher symmetry.
3. Berson, J. A.; Birney, D. M.; Dailey III, W. P.; Liebman, J. F. In Modern Models of Bonding and Delocalization; Liebman, J. F.; Greenberg, A., Eds.; VCH: New York, 1988; p. 391.
4. Wiberg, K. B.; Nakaji, D.; Breneman, C. M. J. Amer. Chem. Soc. 1989, 111, 4178.
5. 2 organic substances in SI units published as J. Phys. Chem. Ref. Data 1982, 11, Suppl. 2.
6. 2 documents relative to N-N double-and triple-bond strengths.
7. Liebman, J. F. Inorg. Nucl. Chem. Lett. 1975, 11, 687.