Properties of haloalkanes Flashcards
1
Q
how do haloalkanes contain polar bonds?
A
the halogens are more electronegative than the C atom
2
Q
what happens to electronegativity down group 7?
A
electronegativity decreases
3
Q
why does rate of reaction increase down group 7?
A
the greater the Mr of the halogen, the lower the bond enthalpy.
Lower bond enthalpy = breaks more easilly
4
Q
what determines how fast a carbon halogen bond will break?
A
bond enthalpy
5
Q
which haloalkane will react fastest and why?
A
iodoalkanes
- C-I bonds are weakest so easiest to break
- fastest rate of hydrolysis
6
Q
how does primary, secondary or tertiary halogenoalkane status affect rate of hydrolysis?
A
- tertiary reacts fastest
- intermediate carbocation formed is most stable
7
Q
A
