Question 36 Which of the following insecticides is formed by Diels Alder reactio

Question

Question 36

Which of the following insecticides is formed by Diels Alder reaction of hexachlorocyclopentadiene and how do you know that Briefly explain why there is such a vast number of insecticides ... 20 words can easily be enough. Pyrethrin insecticides are said to be "natural" type insecticides. Why? What structural feature is found in synthetic pyrethroids, like permethrin...? What is the class of pesticides that is causing some much trouble for bees? How did Cousteau and friends probably get exposed to PCBs? How did Gavin get exposed, probably, to PBDEs? How do Orcas get exposed to PCBs ad PBDEs? Draw an example of a PCB congener and an example of a PBDE congener.

Explanation / Answer

31. The first product sic chlorine atoms would be formed. This is because when a duels alder reaction would occur, it would give cycloadduct structure as the catalyst here would be an l-menthyl acrylate. These addicts obtained will be having opposite configurations.

32. There is a vast number of insecticides because of the vast number of insects that are present with each being specific to one type of insect.

33. Pyrethenes are said to be natural insecticides since they are obtained from Chrysanthemum cinerariifolium

The synthetic pyrethroids also contain an ester of chrysanthemic acid with a different alcohol group than natural pyrethroids.

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