Question

Number of chiral carbons in β–D–(+)– glucose is
(1) Six
(2) Three
(3) Four
(4) Five

Answer 1

Answer on Question #41092 – Chemistry – Organic Chemistry

Question:

Number of chiral carbons in $\beta$ -D-(+)-glucose is: (1)Six; (2)Three; (3)Four; (4)Five

Answer:

The linear form of glucose has 4 chiral atoms of carbon. On the contrary, the cyclic form (shown below) has 5 chiral atoms of carbon numbered respectively the firs (1), the second (2), the third (3), the fourth (4) and the fifth (5). (4) Five is the correct answer on the test question.

$\beta$ -D- $(+)$ -glucopyranose