Higher temperatures are less preferred because they may lead to undesirable reactions such as carbon loss through {HEAD ~ reaction} with {TAIL ~ oxygen} 
with
Higher temperatures are less preferred because they may lead to undesirable reactions such as carbon loss through { HEAD ~ reaction } with { TAIL ~ oxygen }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL