Understanding Fischer Projections

What do the horizontal lines in a Fischer projection represent?

• Wedges coming out of the page

• Dashes going into the page

• Bonds in the plane of the page

• Non-bonding electron pairs

In the visualization method, which part of the face aligns with the carboxy group in L-alanine?

• Right eye

• Forehead

• Chin

• Left eye

What happens when you rotate a Fischer projection by 90 degrees?

• It becomes a mirror image

• It remains unchanged

• It becomes a diastereomer

• It becomes an enantiomer

What is the result of rotating a Fischer projection by 180 degrees?

• It becomes identical to the original

• It becomes a diastereomer

• It becomes a new compound

• It becomes an enantiomer

In the context of Fischer projections, what does the term 'enantiomer' refer to?

• A molecule with no chiral centers

• A molecule with the same spatial arrangement

• A molecule with a different molecular formula

• A molecule with the same connectivity but different spatial arrangement

When converting 3-bromo-2-butanol to a Fischer projection, what is the first step?

• Identify the chiral centers

• Align the molecule with your forehead

• Rotate the molecule 180 degrees

• Draw the skeleton with two lines

What is the main challenge when dealing with molecules like glucose in Fischer projections?

• Finding the molecular weight

• Drawing the correct number of lines

• Ensuring all chiral centers are correctly oriented

• Identifying the correct number of chiral centers

How do you determine the correct orientation of groups in a Fischer projection?

• By aligning with the left eye only

• By using a model kit

• By guessing and checking

• By rotating the molecule 360 degrees

What is the purpose of the guess and check method in Fischer projections?

• To ensure the correct orientation of substituents

• To identify the number of chiral centers

• To randomly assign R and S configurations

• To determine the molecular weight

Which method is recommended for dealing with more than three chiral centers in Fischer projections?

• Option three: Guess and check

• Option one: Rotate all chiral centers

• Option four: Use a model kit

• Option two: Align with the forehead