This question is about cyclic hydrocarbons containing carbon-carbon double bonds.
Describe a chemical test that can be used to show that a cyclic hydrocarbon is unsaturated (contains a double carbon-carbon bond). Give the result of the test.
Test: ____________________
Result: ____________________
The table below shows the name and molecular formula of three cyclotrienes (cyclic hydrocarbons containing three carbon-carbon double bonds).
| Name | Formula |
|---|---|
| Cyclohexatriene | C6H6\text{C}_6\text{H}_6C6H6 |
| Cycloheptatriene | C7H8\text{C}_7\text{H}_8C7H8 |
| Cyclooctatriene | C8H10\text{C}_8\text{H}_{10}C8H10 |
Determine the general formula for cyclotrienes in terms of nnn.
General formula = ____________________
Figure 1 shows the displayed structural formula of cyclohexene, C6H10\text{C}_6\text{H}_{10}C6H10.
Chlorine reacts with cyclohexene to produce a chlorinated compound with the formula C6H10Cl2\text{C}_6\text{H}_{10}\text{Cl}_2C6H10Cl2.
Complete Figure 2 to show the displayed structural formula of C6H10Cl2\text{C}_6\text{H}_{10}\text{Cl}_2C6H10Cl2.
Calculate the percentage by mass of chlorine in a molecule of C6H10Cl2\text{C}_6\text{H}_{10}\text{Cl}_2C6H10Cl2.
Relative atomic masses (ArA_rAr): H=1\text{H} = 1H=1, C=12\text{C} = 12C=12, Cl=35.5\text{Cl} = 35.5Cl=35.5.
Give your answer to 3 significant figures.