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Norrish reaction
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<p>A Norrish reaction, named after <a href="/facts/Ronald_George_Wreyford_Norrish/V6VpwAdR">Ronald George Wreyford Norrish</a>, is a <a href="/facts/Photochemical_reaction/kDTt7nrT">photochemical reaction</a> taking place with <a href="/facts/Ketone/BqQXpLo4">ketones</a> and <a href="/facts/Aldehydes/xSIRkW03">aldehydes</a>. Such reactions are subdivided into Norrish type I reactions and Norrish type II reactions. While of limited synthetic utility these reactions are important in the <a href="/facts/Photo-oxidation_of_polymers/JD3bkFtL">photo-oxidation of polymers</a> such as <a href="/facts/Polyolefin/hWl2j3r0">polyolefins</a>, <a href="/facts/Polyesters/Ivp9CHpl">polyesters</a>, certain <a href="/facts/Polycarbonates/QU8sH1c6">polycarbonates</a> and <a href="/facts/Polyketone/Q38zTVdM">polyketones</a>. </p>