OZ Flashcards
What is not present in the troposphere?
Do not form Cl radicals
What occurs in the stratopshere?
Cl radicals are formed to deplete ozone
What is not true about nucleophiles?
That they have a partial negative charge
What are 2 ways in which ozone is removed from the atmosphere?
O + H2O –> 2OH
O + O2 –> O3
Why does ozone depletion occur in the troposphere, and photolysis of oxygen in the stratosphere?
UV of this frequency only available in stratosphere
Ozone depletion occurs at lower frequency in troposphere
How would you describe a propagation reaction?
One radical on each side of the reaction
Which of the haloalkanes reacts fastest and why?
Iodoalkane
Equation for haloalkane + silver nitrate
C4H9X + H2O –> C4H9OH + HX
Example of heterolytic fission
C-Halogen bond is polar
Break to form negative halide ion + positive carbocation
Forms 2 substances with different charges
What type of reaction is hydrolysis of haloalkanes?
Nucleophilic substitution
OH- attacks C in C-Br
Forms dative covalent bond
C-Br bond breaks heterolytically
Alcohol + Br-
Why would a greater dipole cause a faster reaction?
Slightly + attracts water more
What follows this reaction?
NO + O3 –> NO2 + O2
NO2 + O –> NO + O2
Why is ozone important?
It absorbs HIGH ENERGY UV
Which radical is found in the stratosphere, and where is it derived from?
Cl
Breakdown of CFCs
What is initiation?
Production of free radicals
