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