When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form, is

Question

When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form, is (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The D-form of given sugar is <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/1f7257750516fbfcda7bca73161c68e6-.png" /> Configurations at the three chiral carbons (starred) can be changed maintaining D-configuration. Hence, the total number of stereoisomers of D-pyranose =23=8 Thus, the correct integer is 8 .

Q. When the following aldohexose exists in its $D$ -configuration, the total number of stereoisomers in its pyranose form, is

The $D$ -form of given sugar is

Configurations at the three chiral carbons (starred) can be changed maintaining $D$ -configuration. Hence, the total number of stereoisomers of $D$ -pyranose $= 2^{3} = 8$
Thus, the correct integer is $8$ .

Q. When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form, is

The D-form of given sugar is Configurations at the three chiral carbons (starred) can be changed maintaining D-configuration. Hence, the total number of stereoisomers of D-pyranose =23=8 Thus, the correct integer is 8 .

Q. When the following aldohexose exists in its $D$ -configuration, the total number of stereoisomers in its pyranose form, is

The $D$ -form of given sugar is

Configurations at the three chiral carbons (starred) can be changed maintaining $D$ -configuration. Hence, the total number of stereoisomers of $D$ -pyranose $= 2^{3} = 8$
Thus, the correct integer is $8$ .