Typically, {HEAD ~ the molar ratio} of {TAIL ~ alkene} to feed material is less than about 3.0/1.0, preferably less than about 2.0/1.0 
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Typically , { HEAD ~ the molar ratio } of { TAIL ~ alkene } to feed material is less than about 3.0/1.0 , preferably less than about 2.0/1.0
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH