What is the Shape of Hydrogen Bonds in Urea Molecules?

[starlightx]

For one of my chemistry projects, I have to build a 3D model of urea, with 3 urea molecules bonded to each other (via hydrogen bonding). I was just wondering how you know the shape of the hydrogen bond that takes place?? Ie. for water, the hydrogen bonding makes a tetrahedron shape, what's the shape/angle made by urea molecules??

Also, if anyone can explain why Perchloroethylene (Cl2C=CCl2) is effective for dry cleaning (i.e. the polarity, bonding, etc) that would be really appreciated thanks!

 

[Borek]

For one of my chemistry projects, I have to build a 3D model of urea, with 3 urea molecules bonded to each other (via hydrogen bonding). I was just wondering how you know the shape of the hydrogen bond that takes place?? Ie. for water, the hydrogen bonding makes a tetrahedron shape, what's the shape/angle made by urea molecules??

Lone pairs.

 

[Blueshift5]

I can provide some insight into your questions about urea and Perchloroethylene.

Firstly, the shape of the hydrogen bond between urea molecules is not as well-defined as the tetrahedral shape in water. This is because the hydrogen bond in urea is weaker and more variable, depending on the surrounding molecules and conditions. However, studies have shown that the hydrogen bond between two urea molecules can form a linear or slightly bent shape, with an angle of around 160 degrees. This angle may vary slightly depending on the specific arrangement of the molecules, but it is generally in the range of 150-170 degrees.

Moving on to Perchloroethylene, its effectiveness in dry cleaning is due to its polarity and bonding. Perchloroethylene is a nonpolar molecule, meaning it has a symmetrical distribution of electrons and no net charge. This allows it to easily dissolve nonpolar substances, such as oils and greases, which are commonly found in clothing stains. Additionally, the carbon-chlorine bonds in Perchloroethylene are strong and stable, making it a good solvent for removing tough stains.

I hope this helps answer your questions and provides some understanding of these concepts in high school chemistry. If you have any further questions, please don't hesitate to ask. I am always happy to share my knowledge and help others learn more about the world of chemistry. Best of luck with your project!