comprising contacting a 3,4 dialkoxythiophene with {HEAD ~ an ω halo 1,2 alkanediol} in the presence of {TAIL ~ an acid} 
comprising contacting a 3,4 dialkoxythiophene with { HEAD ~ an ω halo 1,2 alkanediol } in the presence of { TAIL ~ an acid }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL