Explain the term kararch effect

Question

Explain the term kararch effect?

Answer 1

In the addition of hydrogen, halide to unsaturated alkenes in the existence of peroxides the halide adds up to the carbon atom joined to more number of hydrogen atoms and hydrogen adds to the carbon atom joined to lesser number of hydrogen atoms. This is termed as Peroxide effect or kararch effect.

CH₃-CH₂-CH₂BR and CH₃-CH=CH₂+HBr-
N Prophyl bromide