A Levels Chemistry

Under identical conditions, even though it proceeds by the same mechanism, reaction 1 is faster
than reaction 2.
reaction 1
CH;CHBRCH3 + NaCN → CH;CH(CN)CH3 + NaBr
reaction 2
CH;CHBRCH3 + Nal → CH3CHICH3 + NaBr
What factor will explain this result?
A The C-I bond is a stronger bond than the C- Br bond.
B The C-N bond is a stronger bond than the C-I bond.
C The cyanide ion is a stronger nucleophile than the iodide ion.
D The cyanide ion is a weaker nucleophile than the iodide ion.


Reaction Kinetics | 2005 - M/J - 9701/1 | Q24