Podcast
Questions and Answers
What happens to the Fischer convention when a molecule undergoes a 180° rotation?
What happens to the Fischer convention when a molecule undergoes a 180° rotation?
- It is broken
- It becomes ambiguous
- It remains unchanged (correct)
- It is only partially maintained
What is the effect of rotating a Fischer projection around a single bond?
What is the effect of rotating a Fischer projection around a single bond?
- It creates a new compound
- It breaks the Fischer convention
- It keeps the stereochemistry unchanged (correct)
- It changes the stereochemistry
How are priorities assigned to substituents on a chiral carbon in a Fischer projection?
How are priorities assigned to substituents on a chiral carbon in a Fischer projection?
- Randomly
- Alphabetically
- By molecular weight
- By functional group priority (correct)
What is required to assign an R or S designation to a stereocenter?
What is required to assign an R or S designation to a stereocenter?
What is the purpose of the glyceraldehyde enantiomers as stereochemical reference compounds?
What is the purpose of the glyceraldehyde enantiomers as stereochemical reference compounds?
What happens to the —H and —OH groups after a 90° rotation in a Fischer projection?
What happens to the —H and —OH groups after a 90° rotation in a Fischer projection?
What does the -ose suffix designate in a carbohydrate?
What does the -ose suffix designate in a carbohydrate?
How is a tetrahedral carbon atom represented in a Fischer projection?
How is a tetrahedral carbon atom represented in a Fischer projection?
What type of modification can occur to the amino group in a carbohydrate?
What type of modification can occur to the amino group in a carbohydrate?
What is the significance of the root (-tri-, tetr-, pent-, hex-) in a carbohydrate molecular structure?
What is the significance of the root (-tri-, tetr-, pent-, hex-) in a carbohydrate molecular structure?
How can a Fischer projection be rotated on the page?
How can a Fischer projection be rotated on the page?
What is the significance of the horizontal and vertical lines in a Fischer projection?
What is the significance of the horizontal and vertical lines in a Fischer projection?
What is the term for diastereomers differing only at the hemiacetal or acetal carbon in carbohydrate chemistry?
What is the term for diastereomers differing only at the hemiacetal or acetal carbon in carbohydrate chemistry?
What is the most stable conformation of pyranose rings?
What is the most stable conformation of pyranose rings?
What is the process by which the pure anomers of D-glucopyranose slowly convert into a 37:63 equilibrium mixture?
What is the process by which the pure anomers of D-glucopyranose slowly convert into a 37:63 equilibrium mixture?
What is the purpose of converting ⎯OH groups into esters and ethers in carbohydrate reactions?
What is the purpose of converting ⎯OH groups into esters and ethers in carbohydrate reactions?
What is the chirality center created by the formation of the cyclic hemiacetal in pyranoses?
What is the chirality center created by the formation of the cyclic hemiacetal in pyranoses?
What is the designation of the OH at the anomeric center that is on the same side of the Fischer projection structure as the hydroxyl that designates whether the structure is D or L?
What is the designation of the OH at the anomeric center that is on the same side of the Fischer projection structure as the hydroxyl that designates whether the structure is D or L?
