Ionic and Hydrogen Bond Interactions

Ionic bonds form between oppositely charged ions(fully charged); strong in only water

Ionic bond interactions form between oppositely charged ions(full charges)

  • electrons are NOT shared

  • Ions remained charged(ions)

Hydrogen Bond: Interaction between partially charged hydrogen and a more electronegative atom

  • Charge-basted integration, expect with partial charges intend of full

  • This is a type of dipole-dipole interaction that is very common in biological systems

  • Use dash lines to indicate hydrogen

  • Molecules with polar covalent bonds are called ‘polar uncharged’

Water molecules form hydrogen bonds with other water molecules

  • Hydrogen bond interactions are individually weak

  • Biological systems are aqueous(lots of water!)

  • Collectively, hydrogen bonds have a strong influence on the behavior of molecules

Substances that can interact with water are more likely to be soluble in water

  • “Like dissolves like” = Hydrophilic

    • Molecules with polar covalent bonds can form hydrogen bond interactions to interact with other polar molecules

How does water interact with ions?

  • An ion-dipole interaction occurs when one atoms with a permanent partial charge interacts with a fully charged atom

  • Molecules with opposite charges(partial or full) interact

Summary

  • Molecules with fully opposite charges can interact with ionic bond forces

  • Molecules with partially charged hydrogens can interact with hydrogen bonds with electronegative atoms in other molecules

  • Ionic and hydrogen bond forces are weak interactions in aqueous solution, and form and break on short time scales

    • Interactions can occur without a chemical reaction

  • Molecules with full or partial charges interact well with water(hydrophilic )