Reasons for the discoloration of cyclopentadiene
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The cyclopentadiene obtained through distillation gradually turns yellow; exposure to air causes the yellow peroxides to oxidize automatically, but it still turns yellow even when under nitrogen sealing. Please experts analyze this issue :)
The yellowing of cyclopentadiene may be due to its reaction with oxygen to form peroxides or other oxidation products. Even under nitrogen protection, cyclopentadiene may still contain trace amounts of residual oxygen, or it may be affected by factors such as light and temperature, which accelerates the oxidation process. Furthermore, impurities that may be present in cyclopentadiene could also contribute to this discoloration process. .
It is possible that dicyclopentadiene was formed after prolonged storage; this dicyclopentadiene then dissolves back into cyclopentadiene, giving it a yellow color