In an example of interesting nomenclature, adding 90 to the numbers given to each of these compounds will give one the exact 
In an example of interesting nomenclature, adding 90 to the numbers given to each of these compounds will give one the exact number of atoms of each of its constituent elements.  They can be produced using a pentavalent antimony salt, a reaction discovered by Frederic (*) Swarts and revised by McNary and Henne.  An important theory about them was proposed by Rowland and Molina after James Lovelock used an electron capture detector to identify the presence of two of them in the atmosphere.  After that theory about a potentially dangerous radical reaction was verified, the Montreal Protocol was signed to prevent further production of them.  For 10 points, name these compounds, the best known of which is Freon, which wreak havoc in the mesosphere by destroying ozone.
In an example of interesting nomenclature, adding 90 to the numbers given to each of these compounds will give one the exact number of atoms of each of its constituent elements.  
{chlorofluorocarbon}s [accept {CFC}s] (2) [DW]