In {TAIL ~ certain embodiments}, the ω halo 1,2 alkanediol is {HEAD ~ a 3 halo 1,2 propanediol} 
In { TAIL ~ certain embodiments } , the ω halo 1,2 alkanediol is { HEAD ~ a 3 halo 1,2 propanediol }
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD