Draw a skeletal structure for each of the compounds. a. CH 3 CHO b. CH 3 OCH 3

Welcome back everyone. What are the scalable structures of CH three CH two, Cho and CH three C H2O CH three. Now, one of the easiest ways to draw skal structures is just to identify that the first structure is an aldehyde. It has an LK group B to Cho, right. So we can essentially draw an aldehyde group. What, what is it? Well, essentially we want to draw a carbona that is bonded to hydrogen right? Now, on the other hand, we have an ethyl group, it's CH three CH two. So we're simply going to draw CH two or by CH three, we have a straight LK group. Once we can check if the structure is correct. First of all, we have CH three at the vertex or specifically, in this case, at the corner, we have siege three, followed by CH two. Every implicit carbon atom must have a specific number of hydros. So for example, the first carbon atom only has one bond, meaning there must be three implicit hydros. The second carbon has two bonds. So there must be two implicit hygen because carbon has a VO and CO four. And then we have Cho carbon has four bonds. So the first structure is correct. What about the second structure? It has the form of an alkyl group bonded to oxygen bonded to another alkyl group. So it is an ether right, there is a central oxygen, oxygen forms only two bonds. On the left, we have a two membered straight chain because there are no pres so we can just draw one carbon and then the other on the other side, we have CH three. So we only want to add one carbon and we can check if the structure is correct. First of all, there is one carbon at the corner, it has one bond. So there must be three hydrogens. That's correct. But by oxygen, then we have a siege two group carbon with two bonds has two implicit hydrogens. And finally siege three, which will have three implicit hydrogens because we have one bond already visible. And therefore, we have drawn the two structures. Thank you for watching.

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1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

1. A Review of General Chemistry

Condensed Structural Formula

Organic Chemistry

1. A Review of General Chemistry

Condensed Structural Formula

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Problem 59a,b

Textbook Question

Draw a skeletal structure for each of the compounds.
a. CH₃CHO
b. CH₃OCH₃

Verified step by step guidance

Step 1: Understand the skeletal structure representation. Skeletal structures simplify organic molecules by representing carbon atoms as vertices and omitting hydrogen atoms bonded to carbons. Bonds between atoms are shown as lines.

Step 2: For compound (a) CH3CHO, identify the functional groups. CH3 represents a methyl group, and CHO represents an aldehyde group. The aldehyde group contains a carbon atom double-bonded to an oxygen atom and single-bonded to a hydrogen atom.

Step 3: Draw the skeletal structure for CH3CHO. Start with the methyl group (CH3) as a vertex, then connect it to a carbon atom that is part of the aldehyde group. Represent the aldehyde group with a double bond to oxygen and a single bond to hydrogen.

Step 4: For compound (b) CH3OCH3, identify the functional groups. CH3 represents methyl groups, and O represents an oxygen atom. This compound is an ether, where oxygen is bonded to two methyl groups.

Step 5: Draw the skeletal structure for CH3OCH3. Represent the oxygen atom as a vertex, and connect it to two methyl groups (CH3) on either side. Ensure the bonds are clearly shown to indicate the ether functional group.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Skeletal Structures

Skeletal structures are simplified representations of organic molecules that depict the arrangement of atoms and bonds without showing all the hydrogen atoms explicitly. In these diagrams, carbon atoms are represented by vertices or ends of lines, while functional groups and heteroatoms (like oxygen) are shown as symbols. This method allows chemists to visualize complex molecules more easily and focus on the connectivity of the atoms.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. For example, in the compound CH3CHO (acetaldehyde), the carbonyl group (C=O) is the functional group that defines its reactivity. Recognizing functional groups is essential for predicting the behavior of organic compounds in chemical reactions.

Molecular Formulas

Molecular formulas provide a way to represent the composition of a compound by indicating the number and type of atoms present. For instance, CH3CHO indicates that the molecule contains two carbon atoms, four hydrogen atoms, and one oxygen atom. Understanding molecular formulas is crucial for constructing skeletal structures, as they inform the arrangement and connectivity of atoms in the molecule.

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