Photohalogenation (Iodination,Chlorination,Bromination) ||Selective Halogenation by NBS

Photohalogenation OF Alkanes, Flourination, Chlorination, Bromination, Iodination, Reed's Reaction, Pinnacol Formation, Hunsdieker Reaction

Methods OF Preparation OF Alkane with Examples, Properties OF Alkanes (Photohalogenation - Flourination, Bromination, Iodination, Reed's Reaction, Nitration, Sulphonation, Isomerisation, Combustion, Aromatisation)

Photohalogenation || Calculation OF Mono and Di-halo Derivatives|| Polyhalogenation || Chlorination and Bromination Selectivity

Boron, Chlorine, Bromine, Fluorine

Bromination by NBS || Hunsdiecker Reaction

It we see the reaction of methane with halogen, the rate determining step for chlorination is, endothermic reaction of the chlorine atom with methane to form methyl radical and a molecule of HCl. So free radical is the intermediate of the reaction. Formation of free radical depends upon the energy required to break a bond between a hydrogen atom and a carbon atom. Chlorination of propane and Bromination of propane. when compared it is found that bromination is more selective than chlorination. The probability factor for 3^(@),2^(@),1^(@)H atom is 5.0:3.8:1.0 at 25^(@)C for chlorination. Isobutane when reacts with chlorine in presence of ultra violet radiations yield 2 products primary hydrogen substituted and 3^(@) hydrogen substituted Find their % in product mixture

Fluorine, oxygen, bromine, iodine