Question icon
Grade 12Organic Chemistry

why does Mg chose C-Br bond over C-Cl bond in the prep of grignard reagent?

Profile image of Trinadh
6 Years agoGrade 12
Answers icon

2 Answers

Profile image of Arun
6 Years ago
the formation of a Grignard reagent from a compound possessing both bromine and chlorine, magnesium preferentially inserts into the C–Br bond over the C–Cl bond
Profile image of Vikas TU
6 Years ago
Dear student 
Simply put the C-Br bond is weaker than C-Cl, so oxidative addition occurs much faster. Oxidative addition is treated in more depth in any textbook on organometallic chemistry (the usual context is transition metals but it applies equally well to Mg). 
Good Luck