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Karam Kasturi Sophia Hydrogen Bonding “I came, I saw, I conquered……chemistry”-Muhammad Awan

Karam Kasturi Sophia Hydrogen Bonding “I came, I saw, I conquered……chemistry”-Muhammad Awan. Content.

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Karam Kasturi Sophia Hydrogen Bonding “I came, I saw, I conquered……chemistry”-Muhammad Awan

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  1. KaramKasturiSophiaHydrogen Bonding“I came, I saw, I conquered……chemistry”-Muhammad Awan

  2. Content • Hydrogen Bonding is a special type of intermolecular attraction between the hydrogen atom in a polar bond (particularly H-F, H-O, and H-N) and non-bonding electron pair on a nearby small electronegative ion or atom usually F, O, OR N (in another molecule). • Hydrogen bonds are weaker than covalent bonds • E.g. a hydrogen bond exists between the H atom in an HF molecule and the F atom of an adjacent HF molecule. • Hydrogen bonds can be considered a type of dipole-dipole attraction.

  3. What is dipole-dipole and how does it work in hydrogen bonding? • Dipole-dipole attractions are formed due to presence of a permanent dipole moment in polar molecule. • These forces originate from electrostatic attractions between the partially positive end of one molecule and partially negative end of a neighboring molecule. • Molecules have to be extremely close for dipole-dipole to work. • These bonds an be called dipole-dipole attraction. Why? Because… • N, O, and F are so electronegative, a bond between Hydrogen and any of these elements is quite polar, with hydrogen at the positive end and N, O, or F at the negative ends.

  4. Visual http://programs.northlandcollege.edu/biology/biology1111/animations/hydrogenbonds.html

  5. Quiz 1) To what attractions can hydrogen bonding be linked to? • dispersion forces • Ion-dipole forces • Dipole-dipole forces • Covalent bonding 2) In what bonds does hydrogen bonding work? • Only in Covalent bonds • Only in Polar covalent bonds • Only Polar covalent bonds formed between H and 0, N, or F. • Only in Ionic bonds

  6. Quiz 3) Hydrogen Bonds are weaker than? • Covalent bonds • Ionic bonds • Both of these. 4) what element in the following diagram holds the negative charge?

  7. Questions • If you have any questions feel free to keep them to yourself. • Any questions? #conquerchemistry

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