In a study of the formation of the insect thorax a chemical...

Name: in a study of the formation of the insect thorax a chemical is found that is at a high concentration at the posterior end of the thorax region of a larva and a low concentration at the anter 39542
Uploaded: 2020-07-13T04:08:10-08:00
Duration: 2 min 57 s
Channel: Madeline Currie
Description: in a study of the formation of the insect thorax a chemical is found that is at a high concentration at the posterior end of the thorax region of a larva and a low concentration at the anter 39542

In a study of the formation of the insect thorax, a chemical is found that is at a high concentration at the posterior end of the thorax region of a larva and a low concentration at the anterior end of the thorax. The concentration does not change when the larva molts. What type of chemical is this and how does it work?

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Transcript

00:04 This problem tells us that this molecule on the left can be converted into the molecule on the right by an enzyme found in caterpillar saliva and discusses some of the implications of that for the caterpillar.

00:18 But all it's really asking us to do is to name both of these compounds using the aupac system.

00:25 So these are both esters, and we know that because they have a carbonyl group with an oxygen next to it.

00:32 So with an ester, the name for this chain coming off the o goes out in front of the name as its own word.

00:40 So here we have a one, two, three, four, five, six carbon chain.

00:46 So that is hex.

00:49 And then because we have this double bond in here, that makes it hexene.

00:54 And because it is a substituent and not apparent chain, it is hexine all.

01:00 We also have to indicate where that double bond is in the chain, so it is on carbon 1, 2, 3.

01:06 So we have 3 hexenol.

01:09 And then we also have to indicate the stereochemistry of that chain.

01:12 So double bonds can be either e or z.

01:17 E comes from the german word and gagan, which means away.