With ethylene, for example, a significantly higher molar ratio can be used, because {HEAD ~ the self metathesis} of {TAIL ~ ethylene} produces only ethylene again; no undesirable co product olefins are formed 
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With ethylene , for example , a significantly higher molar ratio can be used , because { HEAD ~ the self metathesis } of { TAIL ~ ethylene } produces only ethylene again ; no undesirable co product olefins are formed
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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