an example would be an O2 that meets water. The electrons in the O2 molecule all move to the opposite side of each atom, away from the negatively charged Oxygen in H2O, thus leaving a slightly negative charge on the side away from the H2O molecule and a slightly positive charge towards the H2O molecule. The positive attract the negative electrons in the water.
Yes, KBr dissociates into K+ and Br- ions in water due to ion-dipole interactions. Water molecules surround the ions, stabilizing them through electrostatic attractions, making KBr an example of ion-dipole attraction.
Ion-dipole, Dipole-dipole, and Dipole-induced dipole.
Symmetric molecules have no dipole moment. An example is carbon tetrachloride, CCl4 , which has no dipole moment yet the C-Cl bonds are polar, (chlorine is more electronegative than carbon). The chlorine atoms each have a small negative charge but because the molecule is tetrahedral there is no dipole and therefore no dipole moment
An example of dipole-induced dipole forces is the interaction between a polar molecule, such as water, and a nonpolar molecule, such as nitrogen. The polar molecule induces a temporary dipole in the nonpolar molecule, creating an attractive force between the two molecules. This type of interaction helps explain why some substances can dissolve in water even if they are nonpolar.
Examples of dipole-dipole interactions include interactions between polar molecules like HCl, where the positive end of one molecule is attracted to the negative end of another molecule, causing them to align with each other. This type of interaction is stronger than London dispersion forces but weaker than hydrogen bonding.
Absorption of energy from IR radiation can only occur when the wavelength of radiation and the wavelength of the bond vibration match. If a molecule has symmetry...for example no dipole, we say it is IR inactive. CO2 has no dipole....this would be an IR inactive gas...Cl2 as well. A gas that has a dipole would be IR active. Propene would be a nice example of an IR active gas.It possesses a dipole. One would see a signal around 1650.A:CO2 has no permanent dipole. However, when CO2 undergoes a bending vibration, its dipole moment changes from zero to some non-zero value. This vibration produces a change in dipole moment and is therefore IR active.
Absorption of energy from IR radiation can only occur when the wavelength of radiation and the wavelength of the bond vibration match. If a molecule has symmetry...for example no dipole, we say it is IR inactive. CO2 has no dipole....this would be an IR inactive gas...Cl2 as well. A gas that has a dipole would be IR active. Propene would be a nice example of an IR active gas.It possesses a dipole. One would see a signal around 1650.A:CO2 has no permanent dipole. However, when CO2 undergoes a bending vibration, its dipole moment changes from zero to some non-zero value. This vibration produces a change in dipole moment and is therefore IR active.
Dipole-dipole interactions are of electrostatic nature.
The dipole moment tells us that there is net dipole on the molecule which indicates that any dipoles due to polarity of the covalent bonds do not cancel each other out. For example H2O has a dipole moment which rules out a linear structure where the bond dipoles would cancel each other out.
Dipole-dipole is between two polar molecules, that would be polar anyway. Dipole-induced dipole is between a polar molecule and a non-polar molecule that is now polar due to the proximity of a polar molecule.
When the range of electronegativity between the atoms are really high. For example, hydrogen has 2.20 elctronegativity and fluorine has 3.98 and the range between them is 1.78. Compared to like nitrogen (3.04) and oxygen (3.44), whose range is 0.4, the hydrogen and fluorine will have a strong dipole-dipole force.
When molecules have permanent dipole moments