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Ch.23 - Organic and Biological Chemistry
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Capitolo 23, Problema 73

Write the open-chain structure of a four-carbon deoxy sugar.

Guida verificata passo dopo passo
1
Step 1: Understand that a deoxy sugar is a sugar molecule where one of the hydroxyl groups (-OH) is replaced by a hydrogen atom (H).
Step 2: Recognize that a four-carbon sugar is known as a tetrose. The simplest form of a tetrose is an aldotetrose, which has an aldehyde group at one end.
Step 3: Draw the basic structure of an aldotetrose, which includes four carbon atoms in a chain with an aldehyde group (CHO) at the first carbon and hydroxyl groups on the other carbons.
Step 4: Replace one of the hydroxyl groups (-OH) on the carbon chain with a hydrogen atom (H) to create the deoxy sugar. This can be done at any carbon except the one with the aldehyde group.
Step 5: Ensure the structure maintains the correct number of hydrogen atoms and bonds, resulting in a four-carbon deoxy sugar with the general formula C4H8O3.

Concetti chiave

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Deoxy Sugars

Deoxy sugars are carbohydrates that have lost one or more hydroxyl (-OH) groups, typically at the 2-position. In the case of a four-carbon deoxy sugar, this means that the sugar will have four carbon atoms and one less oxygen than its corresponding sugar. An example is 2-deoxy-D-ribose, which is a crucial component of RNA.
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Open-Chain Structure

The open-chain structure of a sugar refers to its linear form, as opposed to its cyclic form. In this structure, the carbon atoms are connected in a straight chain, with functional groups such as aldehydes or ketones at one end. For a four-carbon deoxy sugar, the open-chain structure will consist of four carbon atoms linked by single bonds, with the appropriate hydrogen and oxygen atoms attached.
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Structural Representation

Structural representation in chemistry involves depicting the arrangement of atoms within a molecule. For sugars, this includes showing the carbon backbone and the positions of functional groups. In drawing the open-chain structure of a four-carbon deoxy sugar, it is essential to accurately represent the carbon atoms, the absence of the hydroxyl group, and the placement of hydrogen atoms to reflect the correct molecular formula.
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