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 52 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
Excellent

kjohnson

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

An example of polymorphism: the two colour variations found in the orchid Dactylorhiza sambucina. An example of polymorphism: the two colour variations found in the orchid Dactylorhiza sambucina.
The Indian palm squirrel is the most common type of squirrel found in India. The Indian palm squirrel is the most common type of squirrel found in India.
A spider from the genus Selenops, which have been found to be able to glide thro A spider from the genus Selenops, which have been found to be able to glide thro
Types of kidney stones found in an adult. Types of kidney stones found in an adult.
A compound microscope. A compound microscope.
Reaction 6: Generation of the First Energy-Rich Compound Reaction 6: Generation of the First Energy-Rich Compound
Video: Major Elements in Biological Molecules: Proteins

For a complete list of videos, visit our video library