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D/L Nomenclature

The enantiome...

Question

The enantiomer of $α - D - (+) -$ glucose is ?

A

$β - D - (+) - g l u c o s e$

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B

$α - D - (-) - g l u c o s e$

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C

$α - L - (-) - g l u c o s e$

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D

$β - L - (-) - g l u c o s e$

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Solution

The correct option is C
$α - L - (-) - g l u c o s e$

In the D family the more dextrorotatory anomer is named $α - D - (+)$ and in the L family, the more laevorotatory anomer is named $α L - (-)$ .

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Similar questions

Q. Match the following:

List - I	List - II
A) Aldopentose	i) D-Glucose and L-Glucose
B) Anomers	ii) Ribose
C) Enantiomers	iii) $α$ -D-Glucose and $β$ -D-Glucose
D) Functional isomers	iv) Glucose and Fructose

Q. Match the following.

List-I	List-II (Monomer)
A) Sucrose	i) $β$ -D-Galactose and $β$ -D-Glucose
B) Cellulose	ii) $α$ -D-Glucose and $β$ -D-Fructose
C) Starch	iii) $β$ -D-Glucose
D) Lactose	iv) $α$ -D-Glucose

Q. Match List - I with List -II

List-I	List-II
a. Sucrose	i. $β$ -D-Galactose and $β$ -D-Glucose
b. Lactose	ii. $α$ -D-Glucose and $β$ -D-Fructose
c. Maltose	iii. $α$ -D- Glucose and $α$ -D-Glucose

Choose the correct answer from the options given below:

α - D - g l u c o s e

is dissolved in water and kept for a few hours, the major constituent(s) present in the solution is (are)

Q. The enthalpy changes of some process are given below :

α - D - g l u c o s e_{(s)} + H_{2} O ⟶ α - D - g l u c o s e_{(a q)}; Δ H_{d i s s o l u t i o n} = 10.84 k J

.

β - D - g l u c o s e_{(s)} + H_{2} O ⟶ β - D - g l u c o s e_{(a q)}; Δ H_{d i s s o l u t i o n} = 4.68 k J

.

α - D - g l u c o s e_{(a q)} ⟶ β - D - g l u c o s e_{(a q)}; Δ H_{m u t a r o t a t i o n} = - 1.16 k J

Δ H^{\circ}

α - D - g l u c o s e ⟶ β - D - g l u c o s e

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