A Norrish reaction, named after Ronald George Wreyford Norrish, is a photochemical reaction taking place with ketones and aldehydes. Such reactions are subdivided into Norrish type I reactions and Norrish type II reactions.[1] While of limited synthetic utility these reactions are important in the photo-oxidation of polymers such as polyolefins,[2] polyesters, certain polycarbonates and polyketones.
^Named Organic Reactions, 2nd Edition, Thomas Laue and Andreas Plagens, John Wiley & Sons: Chichester, England, New York, 2005. 320 pp. ISBN 0-470-01041-X
^Grause, Guido; Chien, Mei-Fang; Inoue, Chihiro (November 2020). "Changes during the weathering of polyolefins". Polymer Degradation and Stability. 181: 109364. doi:10.1016/j.polymdegradstab.2020.109364. S2CID 225243217.
A Norrishreaction, named after Ronald George Wreyford Norrish, is a photochemical reaction taking place with ketones and aldehydes. Such reactions are...
George Wreyford Norrish FRS (9 November 1897 – 7 June 1978) was a British chemist who was awarded the Nobel Prize in Chemistry in 1967. Norrish was born in...
a reaction that proceeds via an enol (see Haloform reaction) With heavy water to give an α-deuterated ketone Fragmentation in photochemical Norrish reaction...
Norrish is a surname. Notable people with the surname include: Jason Norrish (born 1972), Australian rules footballer Merwyn Norrish (born 1926), New Zealand...
leading to his name being associated with the process. The Type II Norrishreaction is the equivalent photochemical process α-cleavage A. J. C. Nicholson...
organic reactions are electrocyclic reactions, radical reactions, photoisomerization, and Norrishreactions. Alkenes undergo many important reactions that...
surface ketone groups that can cause further gradual degradation via Norrishreactions if the polymer is exposed to light. To minimize this problem, many...
newly formed ketone group then forms another C–C bond by photochemical Norrishreaction to 19 whose alcohol group is induced to eliminate with TsOH to alkene...
acetaldehyde over the object's lifespan. This proceeds via a Type II Norrishreaction. When acetaldehyde is produced, some of it remains dissolved in the...
photo-oxidation of polyethylene terephthalate (PET), via a Type II Norrishreaction. Although the levels produced by this process are minute acetaldehyde...
It is possible to quench triplet reactions. Common organic photochemical reactions include: Norrish Type I, the Norrish Type II, the racemization of optically...
polyurethane, is exposed to the sun (aliphatic carbonyls undergo Norrishreactions, which are somewhat similar). In this case, photolysis of the ester...
Autoacceleration (gel effect, Trommsdorff–Norrish effect) is a dangerous reaction behavior that can occur in free-radical polymerization systems. It is...
technique was developed in 1949 by Manfred Eigen, Ronald George Wreyford Norrish and George Porter, who won the 1967 Nobel Prize in Chemistry for this invention...
traditionally identified as Norrish Type II reaction as their mechanism was first described by Norrish in 1935. Norrish elucidated that an incident photon...
from the original on 2023-04-20. Retrieved 2023-04-20. Bevington, J. C.; Norrish, R. G. W. (1951-03-07). "The catalyzed polymerization of gaseous formaldehyde"...
Ronald George Wreyford Norrish, the 1920 Chair of Physical Chemistry at the University of Cambridge. Disappointed by Norrish's lack of enthusiasm, she...
research at the University of Cambridge supervised by Ronald George Wreyford Norrish where he began the work that ultimately led to them becoming Nobel Laureates...
George Wreyford Norrish and George Porter, the Nobel Prize in Chemistry. They were cited for their studies of extremely fast chemical reactions induced in...
Robert Wilhelm Bunsen Rock crystal Roentgenium Ronald George Wreyford Norrish Rose quartz Roumanite Rubidium Ruby Rudolph A. Marcus Rudolph Pariser Ruthenium...
ambush". BBC News. 8 January 2010. Retrieved 8 January 2010. White, Duncan; Norrish, Mike (9 January 2010). "Togo pull out of African Nations Cup after bus...
Archived from the original on 15 December 2022. Retrieved 24 August 2017. Norrish, Mike (2 December 2008). "Manchester United's Cristiano Ronaldo wins Ballon...
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