Why doesn't iodine react with alkene?

I am not certain why you think it does not. Certainly, it reacts more slowly than Chlorine or Bromine, but it certainly does react to typically form the dihalide. read more

Certainly, it reacts more slowly than Chlorine or Bromine, but it certainly does react to typically form the dihalide. I have not checked for any equilibrium constants, but, I expect they are going to be reactant favored. read more

Iodine does not react with ethane because iodine is low power than ethane. Iodine gives anion & ethane gives cation. iodine is gives negative charge & ethane gives positive charge. Hence iodine does not react with ethane. Iodine is soluble in water. Ethane is not soluble in water. Iodine is useful in the preparation of salt. ethane is alcohol. read more

With alkanes, a free-radical halogenation (substitution) is observed. I was told that there will be no reaction in a similar situation with ethene and ethyne — and I am having trouble understanding why. read more