Classify these sugars by using a name that indicates both the number of carbons and the main functional group present in each. CHO HO a) OH O- ČH2OH CH2OH HO b) Но OH ČH2OH Edit View Insert Format Tools Table

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Classifying Sugars**

To classify sugars, we use a naming system that indicates both the number of carbon atoms and the main functional group present in the molecule. Below, we illustrate this with two examples:

### Structure and Classification

**a) Structure**:
- Formula: CHO-CHOH-CHOH-CHOH-CH2OH
- This sugar has an aldehyde group at one end (CHO) and a chain of carbon atoms with hydroxyl groups (OH) attached.
- Total carbon atoms: 5

**Classification**:
- This is known as an "aldopentose" because it has five carbon atoms (pentose) and an aldehyde group (-aldose).

**b) Structure**:
- Formula: CH2OH-CO-CHOH-CHOH-CH2OH
- This sugar has a ketone group (CO) and two primary alcohol groups (CH2OH) at each end.
- Total carbon atoms: 5

**Classification**:
- This is called a "ketopentose" because it has five carbon atoms (pentose) and a ketone group (-ketose).

These diagrams help in understanding the functional groups and carbon chain length to appropriately name simple sugars.
Transcribed Image Text:**Classifying Sugars** To classify sugars, we use a naming system that indicates both the number of carbon atoms and the main functional group present in the molecule. Below, we illustrate this with two examples: ### Structure and Classification **a) Structure**: - Formula: CHO-CHOH-CHOH-CHOH-CH2OH - This sugar has an aldehyde group at one end (CHO) and a chain of carbon atoms with hydroxyl groups (OH) attached. - Total carbon atoms: 5 **Classification**: - This is known as an "aldopentose" because it has five carbon atoms (pentose) and an aldehyde group (-aldose). **b) Structure**: - Formula: CH2OH-CO-CHOH-CHOH-CH2OH - This sugar has a ketone group (CO) and two primary alcohol groups (CH2OH) at each end. - Total carbon atoms: 5 **Classification**: - This is called a "ketopentose" because it has five carbon atoms (pentose) and a ketone group (-ketose). These diagrams help in understanding the functional groups and carbon chain length to appropriately name simple sugars.
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