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σ, π (sigma, pi)σ-adduct
σ → σ* transition
An electronic transition described approximately as promotion of an electron from a 'bonding' σ orbital to an 'antibonding' σ orbital designated as Math - text. Such transitions generally involve high transition energies, and appear close to or mixed with Rydberg transitions.
Source:
PAC, 1996, 68, 2223 (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2279
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Cite as: IUPAC Compendium of Chemical Terminology, Electronic version, http://goldbook.iupac.org/S05435.html.
Transformed and rewritten from PDF version (entry http://www.iupac.org/goldbook/S05435.pdf)
by: Miloslav Nic, Jiri Jirat, Bedrich Kosata, ICT Prague, Czech Republic
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