Isomerism and StereochemistryhardMCQ SINGLE⭐ Must-Do

The aldohexose D-Glucose possesses exactly 4 internal chiral carbons () and its two structural termiIsomerism and Stereochemistry Chemistry Question

Question

The aldohexose D-Glucose possesses exactly 4 internal chiral carbons ($n=4$) and its two structural terminal ends ($-CHO$ and $-CH_2OH$) are completely different, rendering it utterly unsymmetrical. What is the total theoretical number of possible stereoisomers for this unsymmetrical system?

Answer: B

💡 Solution & Explanation

For completely unsymmetrical molecules, there is absolutely no possibility of internal symmetry collapsing mirror-image pairs into meso forms. Therefore, the total number of distinct stereoisomers is mathematically calculated using the simple $2^n$ exponent rule, where '$n$' is the number of stereogenic units. For glucose, $n=4$. Thus, $2^4 = 16$ total distinct stereoisomers exist.

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