This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Citral, a compound found in lemons and limes, is a mixture of two isomeric alkenes, cis- and ... (Read 61 times)

ENagel

  • Hero Member
  • *****
  • Posts: 540
on: Aug 23, 2018
Citral, a compound found in lemons and limes, is a mixture of two isomeric alkenes, cis- and trans-3,7-dimethyl-2,6-octadienal. Would you expect to see two spots, one for each isomeric alkene, when you analyzed this sample by thin layer chromatography? Explain.

Question 2

One of the known compounds you analyzed, 3,7-dimethyl-1,6-octadien-3-ol, is only available as a racemic mixture. Why did you not see two spots, one for each enantiomer, when you analyzed this sample?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

FergA

  • Sr. Member
  • ****
  • Posts: 352
Reply #1 on: Aug 23, 2018
Answer to Question 1



The two isomers of citral are diastereomers and therefore can potentially be separated because diastereomers can have different physical properties.

Answer to Question 2

Enantiomers are identical in all respects except for how they rotate plane-polarized light and how they interact with another chiral molecule. Therefore, because neither the stationary or mobile phase is chiral, there is no means of separating the two enantiomers and they show up as a single spot.


ENagel

  • Member
  • Posts: 540
Reply 2 on: Aug 23, 2018
Great answer, keep it coming :)

mjenn52

  • Member
  • Posts: 351
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

A jawbone found in the mainland Jenolan Caves A jawbone found in the mainland Jenolan Caves
The yellow-winged darter, Sympetrum flaveolum, is a dragonfly found in Europe and mid and Northern C The yellow-winged darter, Sympetrum flaveolum, is a dragonfly found in Europe and mid and Northern C
) Ornithine and citrulline, which are not found in proteins ) Ornithine and citrulline, which are not found in proteins
Lemurs are found only in Madagascar. Lemurs are found only in Madagascar.
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ... Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
When the air–fuel mixture rapidly changes such as during a rapid acceleration, look for a rapid ... When the air–fuel mixture rapidly changes such as during a rapid acceleration, look for a rapid ...
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library