lindane extraction from aqueous solution using hexane
According to this publication, lindane has the following properties:  

Practically insoluble in water
Specific gravity = 1.85
Melting point = 113 $\mathrm{^oC}$
Solubility in acetone > 200 g/L
Solubility in n-heptane* = 10-14 g/L
* Used as surrogate for hexane solubility for this argument.   

Notes: lindane is by far the most soluble in acetone, though only a small amount could have been used in the 1:9 acetone:water solvent.  If we assume that the reaction mixture were extracted with an equal volume of hexane (conservative I think, probably used more hexane), then the solution would be about 1:10:10 acetone:water:hexane. Given the properties of lindane, I'd expect it to make for a gooey, separate, small layer between the water and hexane.

Prediction:  


  Bottom layer - Water, undissolved iron, dissolved iron chlorides.
  Middle layer - Acetone, lindane, partially reacted lindane, some iron chlorides.
  Top layer - hexane,
  Small amounts of lindane and organic byproducts.