IntermolecularForces

IntermolecularForces - Bp ~56 C Ketones are a good example...

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Ion‐Ion Ionic bonds 25 ‐ 100 kcal/mols comparable in strength to covalent bonds La<ce energy NaCl mp = 800 °C Yet these compounds Dissolve in water and other polar solvents!
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SolvaIon NaCl mp = 800 °C H 2 O Note the shape of the solvent can aFect the solubility. Water can arrange itself well around Na+ and Cl‐ but the shape on the leQ can not. δ + δ
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Dipole‐Dipole ~ 1‐15 kcal/mol (5‐50 kJ/mol) Wikipedia Interac±on between molecules with permanent dipoles H Cl δ + δ− H Cl δ + δ− O δ + δ− O δ + δ− or O δ + δ− O δ + δ−
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Unformatted text preview: Bp ~56 C Ketones are a good example but their low bp shows this is a relavely weak interacon Hydrogen bond strength Hydrogen bonds Advantages Disadvantages Highly directional Reversible Compatible with other interactions Can incorporate multiple H-bonds Weak interaction Highly solvent dependent Depends on donor (X-H) Depends on acceptor (X:) Noncovalent interacIon: Hydrogen bonds N-H O-H X X Willingness to share roughly correlated to basicity...
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This note was uploaded on 02/10/2011 for the course CHEM 333 taught by Professor Lavigne during the Fall '09 term at South Carolina.

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IntermolecularForces - Bp ~56 C Ketones are a good example...

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