Year 13 Chemistry exam revision, AS90698 L3 organic 2011

Tackle the 2011 organic paper then check with assessment schedule . Make sure that you see me about any problems with the paper. Make an appointment for extra help if required.  

2011 90698 organic paper 90698-exm-2011

2011 90698 organic paper assessment schedule 90698-ass-2011

Youtube videos to help with revision

optical isomers

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Organic Chemistry Tutorial: Structural geometrical and optical isomerism

Many Biological molecules are optically active. Optically active organic molecules rotate plane polarised light. To be optically active they must have at least one asymetric carbon in their structure. Most optically active biological molecules rotate light to the left. Optical isomers are called enantiomers and they are non superimposable mirror images of each other. Enantiomers are identical, the only difference between them being the direction in which they rotate light. Special proceedures are used to separate them.

In nature only one enantiomer is biological active.

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