Which of the compounds (A-D) depicted above i | vedclass

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(C) hemiacetal is a functional group characterized by a carbon atom bonded to both an $-OH$ group and an $-OR$ group (where $R$ is an alkyl or aryl gr

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Compound $C$

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(C) hemiacetal is a functional group characterized by a carbon atom bonded to both an $-OH$ group and an $-OR$ group (where $R$ is an alkyl or aryl group).In the provided structures:Compound $A$ is a disaccharide (like lactose or cellobiose) containing a hemiacetal group at the anomeric carbon of one of the sugar units.Compound $B$ is a disaccharide (like sucrose) where both anomeric carbons are involved in the glycosidic linkage,meaning it has no hemiacetal group.Compound $C$ is an alkyl glycoside,which is an acetal,not a hemiacetal.Compound $D$ is a trisaccharide containing a hemiacetal group at the reducing end.Since the question asks which is $NOT$ a hemiacetal,and both $B$ and $C$ lack a hemiacetal group,the provided options are ambiguous. However,based on standard chemistry curriculum,sucrose $(B)$ and alkyl glycosides $(C)$ are acetals. Given the options,if only one must be chosen,$C$ is a clear acetal. Re-evaluating the structures,$B$ is a non-reducing sugar (acetal),and $C$ is an acetal. Since the question implies a single answer,and $B$ and $C$ are both acetals,the question is flawed. Assuming the intended answer is $C$ as a simple acetal.

Which of the compounds $(A-D)$ depicted above is $NOT$ a hemiacetal linkage?

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