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Types of isomerism
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Types of isomerism Isomers are compounds with the same molecular formula but with a different structural formula. In some cases it is only the configuration of the structural formula that differs. This type of isomerism is called stereo isomerism. The types of isomerism can be summarised as below: Alkanes Physical properties 1. At room temperature and pressure: C1 - C4 are gases C5 - C15 are liquids C16 - are solids. 2. As the number of carbon atoms in a straight chain alkane increases, the boiling points rise in a uniform and predictable manner. This is because each molecule is identical in terms of types of atom and bonds present, the only difference being the regular increase in mass. 3. Compounds with branched chains always have boiling points below that of the related straight chain compound. Examples: hexane: boiling point = 69oC 2,2 dimethylbutane: boiling point = 49oC. This is because the straight chain molecules have greater areas of contact between them and hence...
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