Archive for category Unit 27

Fischer and Haworth Projections

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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Chiral Carbon

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