CHEM 281 Chapter Notes - Chapter 4: Formula Vee, Fischer Projection, Atomic Number

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Chapter 4 notes part 6: isomers: the arrangement of atoms in space. Naming a compound drawn as a perspective formula. First, let"s look at how you can determine the configuration of a compound drawn as a perspective formula. We will use the enantiomers of 2-bromobutane as an example: rank the groups (or atoms) bonded to the asymmetric center in order of priority. The atomic numbers of the atoms directly attached to the asymmetric center determine the relative priorities. The higher the atomic number of the atom, the higher the priority. If there is a tie, you need to consider the atoms to which the tied atoms are attached. How to do this is explained next to the structures: if the group (or atom) with the lowest priority (4) is bonded by a hatched wedge: Draw an arrow in the direction of decreasing priority (1) to (2) to (3).

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