Typically, {HEAD ~ the molar ratio} of alkene to {TAIL ~ unsaturated feed material} is greater than about 0.8/1.0, preferably greater than about 0.9/1.0 
Typically , { HEAD ~ the molar ratio } of alkene to { TAIL ~ unsaturated feed material } is greater than about 0.8/1.0 , preferably greater than about 0.9/1.0
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH