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1. A hydrogen bond is the attraction between the lone pair of an electronegative atom and a hydrogen atom that is bonded to an electronegative atom, usually nitrogen, oxygen, or fluorine. The hydrogen bond is often described as a strong electrostatic dipole–dipole interaction. However, it also has some features of covalent bonding: it is directional, stronger than a van der Waals force.
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3. If the center of electron cloud is shifted by x from the proton, the dipole moment may be estimated from p = e2x () Since x is proportional to the applied electric –eld, the dipole moment is also proportional to the –eld.
4. Joseph A. Mascetta, London Forces, pg 52, Chemistry the Easy Way, Third Edition, Barron's, "London forces are about one tenth the force of most dipole interactions and are the weakest of all the electrical forces that act between atoms or molecules" [This might be an accidental inversion of Pauling's summary of London that permanent dipole.
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6. This reduces the deflecting force." The electron dipole needed a positive to negative charge separation, hence two kg subtrons were formulated by the author to exist within the electrons. Another orbits within electron model: "The Revenge of Old Classical Physics: no Space for Photons or Relativity" (4) There must be an origin of any Reviews: 5.
7. Propene contains a CH3 group, but vinyl chloride contains a Cl atom. Vinyl chloride thus has a larger electron cloud, is more polarizable, and has a larger dipole moment. Thus intermolecular attractions are stronger in vinyl chloride, which results in it having the higher boiling point. 6c.
8. The main van der Waals forces in PVC are dipole-induced dipole forces. van der Waals forces include dipole-dipole, dipole-induced dipole, and London dispersion forces. The most important forces in PVC are dipole-induced dipole attractions. PVC is a polymer of vinyl chloride. It is tempting to say that the molecules line up as in the diagram below.
9. The protons ortho and para to electron donating and electron withdrawing substituents show distinct upfield and downfield shifts. 5-HMR Chemical Shift Effects - Lone Pair Interactions When lone pairs on nitrogen or oxygen are anti to a C-H bond, the proton is shifted upfield, presumably the result of n - .