Revise Gamsat » Unit 27 http://www.revisegamsat.com Free Resources and tips to help you pass GAMSAT Thu, 18 Mar 2010 17:17:24 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Fischer and Haworth Projections http://www.revisegamsat.com/chemistry/fischer-and-haworth-projections-104 http://www.revisegamsat.com/chemistry/fischer-and-haworth-projections-104#comments Mon, 14 Sep 2009 16:07:31 +0000 Nicholas Johnson http://www.revisegamsat.com/?p=104 Note the following molecular diagrams are NOT equivalent.

Fischer projections

  1. Generaly represent all the atoms
  2. use lines to represent bonds

eg.

D-glucose_Fischer

see http://en.wikipedia.org/wiki/Haworth_projection for more.

Haworth Projections

  1. Visualise the molecule in three dimentions so more commonly used for ring molecules.
  2. Carbon and Hydrogen atoms are assumed and are not drawn

eg

Glucose_Haworth

See http://en.wikipedia.org/wiki/Haworth_projection for more detail.

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]]> http://www.revisegamsat.com/chemistry/fischer-and-haworth-projections-104/feed 0 Chiral Carbon http://www.revisegamsat.com/chemistry/isomers/chiral-carbon-215 http://www.revisegamsat.com/chemistry/isomers/chiral-carbon-215#comments Mon, 14 Sep 2009 18:07:52 +0000 Nicholas Johnson http://www.revisegamsat.com/?p=215 A Chiral Carbon is one which does not exhibit symmetry. For more information and a test see:

http://www2.vuw.ac.nz/staff/paul_teesdale-spittle/organic/chiral_web/main.htm

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