Which of the following compounds forms hydrogen bonds between its molecules? 1. CH 3 CH 2 OCH 2 CH 2 OH 2. CH 3 CH 2 N(CH 3 ) 2 3. CH 3 CH 2 CH 2 CH 2 Br

All right. Hi, everyone. So for this question, let's identify the compounds which can form inter molecular hydrogen bonds and were given three of them. So before we begin discussing them individually, let's recall what hydrogen bonding entails, right. So hydrogen bonding, it's possible when you have at least one hydrogen bond except er and at least one hydrogen bond donor. So um your hydrogen bond donors are going to be strongly electro negative atoms that are connected to a hydrogen. So for example, fluoride hydrogen, oxygen, hydrogen and nitrogen hydrogen, right? So those electro negative atoms are your donors and your hydrogen bond except ear's are the electron deficient hydrogen that are connected to those electro negative atoms. So with that being said, um if we see hydrogen bond donor and a hydrogen bond, except er in any of these molecules, we know that inter molecular hydrogen bonding is possible. So let's begin with our part a here which is a two carbon chain with an O H group at the end and notice how I said, ohh, right, because O H is an example of a Cove island bond that is capable of hydrogen bonding because oxygen is your hydrogen bond donor, it's very electro negative and your hydrogen bond except er is that hydrogen that it's attached to write because it's very electron deficient. So because we see that O H group there, we know that molecule A can in fact form hydrogen wants and now we can move on to molecule B the molecule B Has a nitrogen with two method groups attached and a hydrogen. So we have an NH group and NH just like O H is another example of a Covid Lynn bond that is capable of hydrogen bonding because nitrogen of course, is your hydrogen bond donor and hydrogen is of course your hydrogen bond except so this N H N molecule B can also form. How did you get parts? So now let's look at molecule seat and molecule C is also in a mean just like molecule B but it has three methyl groups attached to nitrogen and no hydrogen. So we have no hydrogen, which means that we have no NH and therefore molecule C is incapable of forming hydrogen bonds. So the first two molecules are capable of forming hydrogen bonds, but the third one molecule C is not. So that's gonna correspond to option D in your multiple choice and that's gonna be pretty much it for this video. So thank you very much for watching and I hope you found this helpful.

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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
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13. Alcohols and Carbonyl Compounds2h 17m
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15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
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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
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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

2. Molecular Representations

Intermolecular Forces

Organic Chemistry

2. Molecular Representations

Intermolecular Forces

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3:40 minutes

Problem 33a(1,2,3)

Textbook Question

Which of the following compounds forms hydrogen bonds between its molecules?
1. CH₃CH₂OCH₂CH₂OH
2. CH₃CH₂N(CH₃)₂
3. CH₃CH₂CH₂CH₂Br

Verified step by step guidance

Step 1: Understand the concept of hydrogen bonding. Hydrogen bonds occur when a hydrogen atom is covalently bonded to a highly electronegative atom (such as oxygen, nitrogen, or fluorine) and interacts with another electronegative atom in a nearby molecule.

Step 2: Analyze compound 1 (CH3CH2OCH2CH2OH). This molecule contains an -OH group, which has a hydrogen atom bonded to oxygen, a highly electronegative atom. This allows the molecule to form hydrogen bonds with other molecules of the same type.

Step 3: Analyze compound 2 (CH3CH2N(CH3)2). This molecule contains a nitrogen atom, which is electronegative, but there is no hydrogen directly bonded to the nitrogen. Therefore, it cannot form hydrogen bonds between its molecules.

Step 4: Analyze compound 3 (CH3CH2CH2CH2Br). This molecule contains a bromine atom, which is electronegative, but bromine is not sufficiently electronegative to form hydrogen bonds, and there is no hydrogen directly bonded to bromine. Thus, it cannot form hydrogen bonds between its molecules.

Step 5: Conclude that compound 1 (CH3CH2OCH2CH2OH) is the only compound among the three that can form hydrogen bonds between its molecules due to the presence of the -OH group.

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Key Concepts

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

Hydrogen Bonding

Hydrogen bonding is a type of intermolecular force that occurs when a hydrogen atom covalently bonded to a highly electronegative atom, such as oxygen or nitrogen, experiences an attraction to another electronegative atom. This interaction is crucial for determining the physical properties of compounds, such as boiling and melting points. Compounds capable of hydrogen bonding typically have -OH or -NH groups.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In organic chemistry, common functional groups include alcohols (-OH), amines (-NH2), and halides (like -Br). Identifying functional groups helps predict the behavior of compounds, including their ability to form hydrogen bonds.

Intermolecular Forces

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (atoms, molecules, or ions). These forces include hydrogen bonds, dipole-dipole interactions, and London dispersion forces. Understanding these forces is essential for predicting the physical properties of substances, such as solubility and boiling points, and determining which compounds can form hydrogen bonds.

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Which of the following compounds forms hydrogen bonds between its molecules? 1. CH3CH2OCH2CH2OH 2. CH3CH2N(CH3)2 3. CH3CH2CH2CH2Br

Key Concepts

Hydrogen Bonding

Functional Groups

Intermolecular Forces

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Which of the following compounds forms hydrogen bonds between its molecules?
1. CH₃CH₂OCH₂CH₂OH
2. CH₃CH₂N(CH₃)₂
3. CH₃CH₂CH₂CH₂Br