Alkanes

• General alkanes formula = $C_nH_{2n+2}$
• Methane (n=1)

  
• Ethane (n=2)

  
• Propane (n=3)

  
• Butane (n=4)

  
• Compounds = chloromethane / di/tri/tetrachloromethane:

  CH4+ Cl2→ (light) → HCl + CH3Cl / CH2Cl2/ CHCl3/ CCl4