Topics 6 - 10 Flashcards
1
Q
Asymmetric (chiral) centres
A
An atom which has four different atoms or groups attached.
2
Q
Optical isomers
A
Molecules which exist as non-superimposable mirror images.
3
Q
Optically active
A
A sample which rotates the plane of plane polarised light.
4
Q
Racemic mixutre
A
A 50:50 mixture of two optical isomers.
5
Q
Monoester
A
An ester which only contains one ester functional group.
6
Q
Transesterification
A
A reaction where the alkyl group of an ester is exchanged with the alkyl group of an alcohol.
7
Q
Biodiesel
A
A fuel, similar to diesel, which is made from vegetable sources, e.g. from the reaction of rape seed oil with methanol.
8
Q
Delocalisation
A
The π electrons are spread over several atoms.
