December 24, 2024, 11:54:50 PM
Forum Rules: Read This Before Posting


Topic: Study Guide questions  (Read 2860 times)

0 Members and 1 Guest are viewing this topic.

Offline elcabin

  • New Member
  • **
  • Posts: 4
  • Mole Snacks: +0/-0
Study Guide questions
« on: December 09, 2007, 03:56:11 PM »

What is the difference between a permanent dipole and an induced dipole?

Describe at least one way in which hydrogen bonds play a vital role in stabilizing the structure of biologically important macromolecules.

Offline agrobert

  • Chemist
  • Full Member
  • *
  • Posts: 629
  • Mole Snacks: +69/-17
  • Gender: Male
  • diels alder
Re: Study Guide questions
« Reply #1 on: December 09, 2007, 04:22:26 PM »
A permanent dipole exists which an electropositive atom is bonded to a electronegative atom.  The dispersion or electron pull causes a permanent dipole from + to -.  For example, acetone and DMSO have permanent dipoles.  Permanent dipoles are described within a single molecule.  Induced dipoles occur between two molecules intermolecularly and also intramolecularly.  Check this out

http://en.wikipedia.org/wiki/Induced-dipole_attraction#London_dispersion_forces

(Induced Dipoles)

Hydrogen bonding is a special application of these properties.  Why do you think H-bonding is important?
In the realm of scientific observation, luck is only granted to those who are prepared. -Louis Pasteur

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27888
  • Mole Snacks: +1816/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Study Guide questions
« Reply #2 on: December 09, 2007, 05:27:18 PM »
Please read forum rules.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links