Hey,
Can someone tell me what type of interactions are the dashed lines mean when drawing out the molecule?
Thanks!
Molecular Shape
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Re: Molecular Shape
The dashed lines means that there is an attraction between those two dipole moments. For example, if you draw multiple H2O molecules the dashed lines will be connecting oxygen and hydrogen atoms on the two different molecules because one has a positive and one has a negative dipole so they are attracted to each other.
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Re: Molecular Shape
Keep in mind that dashed lines are intermolecular interactions. Intermolecular interactions can have huge effects: consider hydrogen bonding in water that gives it surface tension. But, intermolecular interactions can also have tiny effects: van der waals forces only occur sporadically and are broken easily. Both could be represented by dashed lines.
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Re: Molecular Shape
I'm still a bit lost.. What's the difference between dotted lines and a solid line? I thought that they were both notations for interactions?
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Re: Molecular Shape
A solid line means the atoms share and intramolecular bond (and are bonded together to make up a molecule or compound). Dashed lines represent interactions/intermolecular forces between these molecules or compounds.
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Re: Molecular Shape
Hey Avery!
Both the dotted and solid lines are notations for interactions! A solid line represents a covalent bond between two elements, a type of interaction in which the elements share electrons. A dotted line, however, represents interactions between two molecules (not elements!) due to their slight charges (dipoles). In short, solid lines represent covalent bonds, a type of intramolecular interaction that keeps one molecule together (bonds elements into a molecule). A dotted line represents dipole attraction between multiple molecules (the slight negative side of one molecule is attracted to the slight positive of another).
Both the dotted and solid lines are notations for interactions! A solid line represents a covalent bond between two elements, a type of interaction in which the elements share electrons. A dotted line, however, represents interactions between two molecules (not elements!) due to their slight charges (dipoles). In short, solid lines represent covalent bonds, a type of intramolecular interaction that keeps one molecule together (bonds elements into a molecule). A dotted line represents dipole attraction between multiple molecules (the slight negative side of one molecule is attracted to the slight positive of another).
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Re: Molecular Shape
We learned about the wedge and dash model in discussion today. The wedge represents the idea that the atom is coming out at you, and the dashes represent the atom falling behind the structure. This model is just a way to interpret the shape in your head.
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