Question 35 Which of the following insecticides is formed by Diels Alder reactio

Question

Question 35

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

Ans 31. The first comound is formed as an insecticide in diels alder reaction of hexachlorocyclopentadiene ,

The reaction involves the hslogrn containing alkenes as dienophiles that have atleast one hydrogen atom attached to the double bond .

The reaction of hexachlorocyclopentadiene yields [2+4] cyclo adducts with thiones , as seen in 1st compound.

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