Photochemical Radical Chain Reactions

Higher Secondary Education

V1 Ignition of a chlorine hydrogen mixture 1:1 using a flash (chlorine detonation gas), detection of the formed hydrogen chloride
V2 Bromination of heptane by irradiation with a) blue and b) red light
V3 Light initiated polymerisation of acrylates

Technical Contents

Bonds in polar HCl molecules compared to non polar H₂ and Cl₂ molecules; homolytic bond cleavage, bonding energy and energy of light quanta, radical chain reactions

Scope

polar covalent bond (lower secondary education), radical substituation and polymerisation; light quanta E = h ∙ ν (higher secondary education)

References

2021: [english] Hoffmann, Heiko; Tausch, Michael W.
Diversity with Light: Photoreaction Pathways and Products of Butyrophenone
World Journal of Chemical Education, 9 (4) :163-174
November 2021
DOI: 10.12691/wjce-9-4-9; [english] Hoffmann, Heiko; Tausch, Michael W.
Intermolecular Photoredox Coupling: Alternative to Norrish Type II Reaction and Yang Cyclization in Ketones with γ-C-Bonds
European Journal of Organic Chemistry
May 2021
DOI: 10.1002/ejoc.202100434; [english] Zimmermann, Marc; Domke, Dennis; Schween, Michael
Photobromination (SR) and Corresp. SN1 Reactions – Key Reactions for the Development and the Application of the Concept of Hyperconjugation
World Journal of Chemical Education, 9 :175-184
2021
DOI: 10.12691/wjce-9-4-10
2018: [english] Hoffmann, Heiko; Tausch, Michael W.
Low-Cost Equipment for Photochemical Reactions
Journal of Chemical Education, 95 (12) :2289--2292
2018
Publisher: American Chemical Society ({ACS})
DOI: 10.1021/acs.jchemed.8b00442
2010: Tausch, Michael W.; Wachtendonk, Magdalene; Bohrmann-Linde, Claudia; Domrose, A.; Krees, S.; Krollmann, P.; Remus, L.; Wambach-Laicher, J.
CHEMIE 2000+ NRW Gesamtband Sek. I
Publisher: C.C.Buchner, Bamberg
2010
2007: Tausch, Michael W.; Wachtendonk, Magdalene; Bohrmann-Linde, Claudia; Krollmann, P.; Schmitz, W.; Wambach, J.
CHEMIE 2000+ Gesamtband mit Kompendium für das Abitur
Publisher: C.C.Buchner, Bamberg
2007
1996: Tausch, Michael W.; Wachtendonk, M.; Porth, H.-R.; Schulze, I.; Wambach, H.
STOFF-FORMEL-UMWELT, CHEMIE S I
Publisher: C. C. Buchner, Bamberg
1996
1993: Tausch, Michael W.; Wachtendonk, M.; Deissenberger, H.; Porth, H.-R.; G. Weißenhorn, R.
CHEMIE S II STOFF-FORMEL-UMWELT, Lehrbuch für Grund- und Leistungskurse, 446 Seiten
Publisher: C. C. Buchner, Bamberg
1993