Table of contents

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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4:16 minutes

Problem 11d,e

Textbook Question

Draw complete Lewis structures for the following condensed structural formulas.
(d) CH₂CHCHO
(e) (CH₃)₃CCOCHCH₂

Verified step by step guidance

Identify the functional groups and connectivity in the condensed structural formula. The formula CH2CHCHO(CH3)3CCOCHCH2 suggests the presence of alkenes, carbonyl groups, and possibly branching due to the (CH3)3 group.

Start by drawing the main carbon chain. The sequence CH2CHCHO indicates a chain of three carbon atoms with a double bond between the first and second carbon atoms (CH2=CH) and a carbonyl group (C=O) on the third carbon.

Add the branching group (CH3)3C. This indicates a tertiary butyl group, which is a central carbon atom bonded to three methyl groups. Attach this group to the appropriate carbon in the main chain, likely the carbonyl carbon based on typical structural conventions.

Incorporate the remaining part of the structure, CCOCHCH2. This suggests a continuation of the carbon chain with a carbonyl group (C=O) followed by a double bond (CH=CH2). Ensure that all carbons have four bonds, using hydrogen atoms to satisfy any remaining valencies.

Verify the structure by counting the total number of carbon, hydrogen, and oxygen atoms to ensure they match the original condensed formula. Check for any formal charges and adjust lone pairs or bonds as necessary to complete the Lewis structure.

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Key Concepts

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

Lewis Structures

Lewis structures are diagrams that represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist. They are essential for visualizing the arrangement of atoms, the distribution of electrons, and the connectivity within a molecule. Understanding how to draw Lewis structures involves knowing the valence electrons for each atom and how they share or transfer electrons to form bonds.

Condensed Structural Formulas

Condensed structural formulas are a shorthand way of representing the molecular structure of a compound. They show the arrangement of atoms in a molecule without explicitly depicting all the bonds. Interpreting these formulas requires recognizing groups of atoms and understanding how they are connected, which is crucial for converting them into full Lewis structures.

Functional Groups

Functional groups are specific groups of atoms within molecules that have characteristic properties and reactivity. Recognizing functional groups such as carbonyls (C=O) or alkenes (C=C) in a condensed formula helps in predicting the molecule's behavior and drawing accurate Lewis structures. They are key to understanding the chemical properties and reactions of organic compounds.

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