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Because of the difference in electronegativities between atoms in a molecule, the electrons in a molecule can be drawn more strongly to one part of the molecule over another. If one region of a molecule is asymmetric and accompanies this difference in electronegativity, a dipole moment results.
Examples:
1) water - H-O-H - oxygen more electronegative than hydrogen...oxygen side is more negative than hydrogen side
2) ammonia - NH3 - pyramidal structure of ammonia leaves hydrogen with one unshared pair of electrons...which makes the unpaired side more negative than the side with three hydrogen atoms
However, even with dipole moments within a molecule, symmetries can prevent a net dipole moment from forming.
An example is carbon tetrachloride (CCl4).
In this molecule, dipole moments exist between chlorine atoms (more electronegative) and the central carbon atom (less electronegative). However, because of the tetrahedral symmetry of the molecule, no net dipole moment is formed.
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∙ 11y ago
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What types of molecules have the strongest intermoleculer forces?
The strongest intermolecular forces exist between polar molecules, because the polar molecules act as tiny dipoles.
What is the nature of attractive force among molecules in liquid bromine?
London dispersion forces the attraction OS instantaneous dipoles and included dipoles so you should select both A and C
What are attractions between water molecules called?
Dipole-dipole The attraction between two dipoles.
Why dielectric constant of polyethylene is independent of temperature?
it is a polymer in which their is no induction effect and no dipoles are formed within the molecules as all the bonds are of equal strength and therefore no polymerization occurs in contrast to molecules such as pvc
Do London dispersion forces exist between polar molecules and result from temporary dipoles?
London dispersion forces derive from the interraction of instantaneous induced dipoles - the inetraction of polar molecules (having a permanent dipole )is called a Keesom force- the force between a permanent polar molecule and an induced dipole in another molecule is called a debye force--
What causes dipoles attractions?
The attraction between polar molecules.
What are dipoles?
Dipoles means "two poles". This refers to molecules or anything where the ends have different charges or fields or polarities. A dipole magnet has a north and south pole. Dipole failure in insulation is where + and - charged pieces oscillate and cause the insulation to fail. Many molecules are dipoles.
What do nonpolars have?
Nonpolar molecules have no net dipoles. The most common nonpolar molecules are hydrocarbons. These are molecules made entirely of carbon and hydrogen atoms.
What do nonpolar molecule have?
Nonpolar molecules have no net dipoles. The most common nonpolar molecules are hydrocarbons. These are molecules made entirely of carbon and hydrogen atoms.
What types of molecules have the strongest intermoleculer forces?
The strongest intermolecular forces exist between polar molecules, because the polar molecules act as tiny dipoles.
What is the nature of attractive force among molecules in liquid bromine?
London dispersion forces the attraction OS instantaneous dipoles and included dipoles so you should select both A and C
What type of inter molecular forces hold oxycontin molecules together?
Hydrogen bonding, dipoles, and London dispersion forces.
Compare the dipoles in the covalent molecules HF, HCl, HBr, and HI. Explain your answers?
CH3 CL highest colorine
What molecules has correctly labeled bond dipoles?
Gonna try and describe this the best I can +, -, + with the arrow facing up ^really hope it helps :)
What are attractions between water molecules called?
Dipole-dipole The attraction between two dipoles.
Why dielectric constant of polyethylene is independent of temperature?
it is a polymer in which their is no induction effect and no dipoles are formed within the molecules as all the bonds are of equal strength and therefore no polymerization occurs in contrast to molecules such as pvc
Do London dispersion forces exist between polar molecules and result from temporary dipoles?
London dispersion forces derive from the interraction of instantaneous induced dipoles - the inetraction of polar molecules (having a permanent dipole )is called a Keesom force- the force between a permanent polar molecule and an induced dipole in another molecule is called a debye force--
